Crosby_ReliefValve_JOS_JBS_JLT_cat_D495
Crosby Styles JOS, JBS and JLT
®
®
Flanged, Full Nozzle
Pressure Relief Valves
Table of Contents
Crosby® Styles JOS, JBS and JLT Pressure Relief Valves
for Gas, Vapor and Liquid Service
Features and Benefits
Full Compliance with ASME Code Requirements
Crosby Styles JOS, JBS and JLT valves are manufactured in accordance with ASME Boiler
and Pressure Vessel Code, Section VIII.
National Board Certified Capacities
Relieving capacities are certified by the National Board of Boiler and Pressure Vessel
Inspectors. Certification includes air, steam and water.
Positive Operating Characteristics
Crosby Styles JOS, JBS and JLT pressure relief valves have been designed with single nozzle ring
control which allows the user to adjust the valve to the process system.
Excellent Seat Tightness
Precision lapped flat metal-to-metal or soft seats provide reliable seat tightness for a broad
variety of applications.
Easy Interchangeability, Flexibility and Versatility
Fully interchangeable from conventional to bellows to liquid trim constructions, from metal
to soft seats, and from closed to open bonnets with minimum parts changes.
Maximum Corrosion Resistance
Nozzle, disc insert and most internal parts are 316 stainless steel. All 316 stainless steel,
Monel *, Hastelloy ** and NACE optional constructions are available.
Reduced Installation Costs
Crosby Styles JLT-JOS and JLT-JBS provide high efficiency at 10% overpressure permitting
selection of smaller valves and associated piping.
Economical to Maintain
Stable, chatter-free valve operation prolongs valve life and reduces frequency of
seat maintenance.
Reduced Down Time
Crosby pressure relief valves are fully backed by a worldwide manufacturing and sales
organization, including spare parts inventories and repair services.
*Monel is a registered trademark of the International Nickel Company, Inc.
**Hastelloy is a registered trademark of Haynes International, Inc.
Features and Benefits
Introduction/Description
Style Variations Descriptions
Style Designation Chart
O-Ring Soft Seats
Valve Materials of Construction
Caps and Lifting Levers
Specifications
Capacity Tables (U.S.C.S.)
2
Page
Pages
Pages
Page
Page
Pages
Pages
Pages
Pages
Table of Contents
2
3-5
6-7
8
9
10-11
12-13
14-43
44-50
Please refer to Warranty and Warnings on page 63.
Equivalents and Conversion Factors Page 51
Capacity Tables (Metric)
Pages 52-57
Crosby Critical Application Valves
Page 58
JBS-BP/JLT-JBS-BP Balancing Piston
Page
59
Flange Information
Page 59
NACE MR0175 Sour Gas Service
Pages 60-61
Seat Tightness Standard
Page 62
Ordering Information/Warranty
Page 63
Crosby Products, Services and
Back Cover
Crosby® Styles JOS, JBS and JLT Pressure Relief Valves
cover process plant overpressure protection applications
and complement our other extensive lines
to satisfy your diversified requirements
Style JOS and JBS
Style JLT-JOS and JLT-JBS
Style JOS-H
(With Open Bonnet)
INTRODUCTION
Crosby Styles JOS/JBS/JLT and JOS-H pressure relief valves
are backed by over 120 years of pioneering research and
development. Designed to provide high quality standardized
overpressure protection to the process and power industries,
the JOS/JBS/JLT unified line of pressure relief valves provides
overpressure protection for air, gas, steam, vapor and liquid
applications.
Standard sizes are 1" D 2" to 8" T2 10" with inlet flange
ratings of ANSI Cl 150, 300, 600, 900, 1500 and 2500.
Standard outlet flanges are ANSI Cl 150 or Cl 300 depending
on valve size and rating. Optional materials of construction
are available for special applications such as cryogenic
service or conditions involving corrosive fluids. In addition,
materials are available conforming to NACE MR0175.
Codes and Standards
JOS/JBS/JLT and JOS-H full nozzle top guided pressure
relief valves are manufactured in accordance with
requirements of ASME Code, Section VIII and capacities are
certified by the National Board of Boiler and Pressure Vessel
Inspectors.
They also comply with the recommended standards of the
U.S. Coast Guard (U.S.C.G.) and conform to API Standards
526 and 527.
Sizing
For information pertaining to sizing and selection, refer to the
CROSBY-SIZE Computer Sizing Program and the Crosby
Pressure Relief Valve Engineering Handbook.
Seat Design
Styles JOS/JBS/JLT pressure relief valves are available with
flat metal-to-metal seats or soft seats for optimum tightness
and minimal maintenance. Details on O-ring materials and
pressure/temperature limitations are on page 9. All O-rings
are standard commercial sizes.
Caps/Lifting Lever Top Constructions
Both Type J screwed cap and Type L bolted cap are offered
with or without test rods. Also available are Type C regular
lifting lever, Type D packed lifting lever and Type E packed
lifting lever with test rod. See pages 12 and 13.
Optional Steam Jackets
For applications where the valve must remain hot to prevent
service fluid from solidifying, optional steam jackets are
available. Contact the factory.
Sizes:
Orifices:
1" D 2" to 8" T2 10"*
D (0.110 sq.in.) to T2 (27.872 sq.in.)*
D (71 sq.mm) to T2 (17981 sq.mm)*
Inlet Ratings:
ANSI Cl 150, 300, 600, 900, 1500 and 2500
Temperature Range: -450F to +1000F (-268C to +538C)
Pressure Range:
JOS and JLT-JOS: 15 to 6000 psig (1.03 to 413.79 barg)**
JBS and JLT-JBS: 25 to 6000 psig (1.72 to 413.79 barg)**
*Larger sizes are available on application. ** Consult Factory for lower set pressures.
See Catalog No. 307 for details.
Please refer to Warranty and Warnings on page 63.
3
Crosby® Styles JOS, JBS, and JLT Pressure Relief Valves
handle process fluids in hostile environments;
provide seat tightness and reliable performance you need
Spindle construction
on smaller valves
thru K orifice
All internal parts shown in color are
stainless steel as standard.
Ball joints above and below guide assure a tight seal and proper alignment,
prevent valve seat damage due to seat
rotation during set pressure adjustment.
Balanced bellows protects Style
JBS valve and environment
against effects of corrosive and
toxic fluids; assures top performance under conditions of
superimposed and built-up variable back pressure in the discharge line.
4
Please refer to Warranty and Warnings on page 63.
D-N Orifice
Construction
Standard Style JOS
Standard Trim with metal-to-metal seat
P-T Orifice
Construction
Optional Style JLT Liquid Trim with
metal-to-metal seat (Standard)
Rugged construction/high performance
High coefficient of discharge
Exceptionally rugged, standardized construction is provided
in a design that can be easily converted from conventional to
balanced bellows type.The disc holder is centered and aligned
in a hard, corrosion-resistant, stainless steel guide for durability
and high performance. The two-piece disc holder/disc insert
construction provides thermal balancing assuring maximum
seat tightness. Stainless steel internal parts allow standard
Style JOS/JBS/JLT valves to be used "off-the-shelf" for most
process overpressure protection applications.
Crosby Style JLT pressure relief valves for liquid service offer
a significant increase in capacity at 10% overpressure. This
high capacity, in many cases, results in economic use of a
smaller valve with an associated reduction in piping costs.
Single nozzle ring control permits shop or field adjustment to
ensure relieving at full capacity flow within allowable 10%
overpressure at all possible ring positions.
Commercial metal-to-metal seat tightness
Corrosion resistant materials
To accommodate severe conditions or corrosive fluid, Crosby
Styles JOS/JBS/JLT pressure relief valves are available in a
number of special material combinations such as Monel,
Hastelloy and stainless steel. For pressure relief valves
meeting the material requirements of NACE Standard MR0175
for sour gas service, see pages 60 and 61.
Selection of corrosion resistant materials requires complete
knowledge of the process fluid. The special materials detailed
in this catalog cover the majority of requirements. Where
specific applications require materials of construction not
shown in this catalog, consult Crosby or your local Crosby
sales representative.
Stable operation
Crosby's smooth, stable operation over a wide range of
system conditions significantly reduces noise and vibration.
This results in lower maintenance and repair costs.
Styles JOS/JBS/JLT valves are engineered to provide the
tightest possible shutoff in a metal-to-metal seat. The finely
lapped and thermally balanced two-piece disc assembly is
protected by ball joints above and below the guide and at the
spring washers. These ball joints prevent rotational damage
to the free floating disc insert during set pressure adjustments,
and assure proper alignment, performance and easy-tomaintain seat tightness. Refer to pages 4 and 62.
Exceptional soft seat tightness
For exceptional tightness, Crosby offers an O-ring soft seat
design capable of handling pressures to 1480 psig (102 barg).
Standard O-ring materials include Viton*, Buna N, EPR, TFE,
silicone rubber and Kalrez**. Temperature and pressure
limits of each material are shown on page 9. Other soft seat
materials may be available on application. Consult Crosby.
Extreme temperature service
For applications involving unusually high and low temperatures,
Crosby offers five different combinations of valve materials
which incorporate the recommendations of American
Petroleum Institute Standard 526 or an upgrade thereof.
Materials of construction are available for temperatures
ranging from -450F to +1000F (-268C to +538C). See pages
10 and 11. For applications above +1000F (+538C) contact
Crosby.
* Reg. U.S.Pat.Office for Du Pont's fluoroelastomer.
** Reg. U.S.Pat.Office for Du Pont's perfluoroelastomer parts.
Please refer to Warranty and Warnings on page 63.
5
Style Variations
Style JOS
Style JBS
Crosby Conventional Style JOS
Crosby Balanced Bellows Style JBS
Crosby Style JOS is the basic conventional pressure
relief valve most frequently used in process
applications. This valve has a closed bonnet that
contains the process fluid within the valve preventing
any release to the atmosphere. Style JOS closed
bonnet valves may be specified with a screwed or
bolted cap, or with a regular or packed lifting lever.
The bonnet vent is always plugged. For steam service,
the JOS valve may also be supplied with an open
bonnet and a regular lifting lever (Style JOS-H).
Crosby Style JBS incorporates a balanced bellows to
provide satisfactory valve performance when the
developed back pressure becomes excessive. The
balanced bellows design will assure that valve
characteristics such as lift and relieving capacity,
opening and closing pressure, and stability are not
unduly influenced by static pressure in the discharge
manifold.
Conventional pressure relief valves are installed when
the discharge is either into a short tailpipe that vents
directly to the atmosphere or when the discharge is
into a low pressure exhaust system designed to
contain the fluid.
Balanced pressure relief valves must be installed
when the built up back pressure in the exhaust
system is allowed to exceed 10% of the valve set
pressure. Style JBS valves must also be installed
when the back pressure is superimposed and variable.
A more detailed explanation on back pressure is
available in the Crosby Engineering Handbook.
The bonnet is vented to monitor bellows integrity.
Aside from balancing, the bellows in Style JBS may
be used to isolate the spring and guiding surfaces in
the valve from corrosive and dirty fluids and shield the
spring from high temperature service.
6
Please refer to Warranty and Warnings on page 63.
Crosby Liquid Service Valves
Styles JLT-JOS and JLT-JBS
Crosby Style JLT pressure relief valve for
liquid service has been designed with a unique
patented internal trim that provides stable
non-chattering valve performance on incompressible fluid applications. This superior
high performance valve for liquid service has
increased capacity at 10% overpressure that
often permits the use of a smaller valve with
an associated reduction in piping costs. The
blowdown is adjustable and an O-ring soft
seat design is also available when exceptional seat tightness is required.
Crosby Style JLT valves have been capacity
certified on water at 10% overpressure and
meet all the requirements of ASME Code
Section VIII.
Style JLT-JOS
Style JLT-JBS
Crosby Style JOS-H
Style JOS-H with open bonnet and Type C
regular lifting lever is available for ASME Code
Section VIII steam applications. Only the bonnet need be changed to convert a Style JOS
Type C to Style JOS-H. With the open bonnet
feature, carbon steel spring material can be
used to +650F (+343C).
Style JOS-H
Please refer to Warranty and Warnings on page 63.
7
JOS, JBS and JLT Style Designations
Size
Inlet x
Orifice x
Outlet
1" D 2"
thru
8" T2 10"
(5)
Pressure/Temperature
Inlet Flange Range Ratings
Style
JOS-Conventional
JBS- With bellows
JLT-JOS-Conventional
with liquid trim(1)
JLT-JBS-Bellows with
liquid trim(1)
JBS-BP-Bellows with
back pressure
balancing piston
JLT-JBS-BP - Bellows
with liquid trim and
back pressure
balancing piston(1)
JOS-H - Conventional
JOS with open
bonnet for ASME
Code Section VIII
steam service to
+650F(+343C)(2)
Material Variations
(3)
(4)
2 - -450F to -76F
(-268C to -60C)
4 - -75F to -21F
(-59C to -30C)
5*- -20F to +450F
(-29C to +232C)
6 - +451F to +800F
(+233C to +427C)
*Except "T" and "T2" 7 - +801F to +1000F
orifice is Cl 300
(+428C to +538C)
flange
None - Standard Materials
S - All 316 St.St.
S4 - All 316 St.St.
except body, bonnet,
cap and spring
M - All Monel with Monel
or Inconel spring
M1 - Monel nozzle and
disc insert
M4 - All Monel except
body, bonnet, cap,
spring and washers
M5 - All Monel except
spring and washers
H - All Hastelloy C
H1 - Hastelloy C nozzle
and disc insert
H4 - All Hastelloy C except
body, bonnet, cap,
spring and washers
H5 - All Hastelloy C except
spring and washers
1 - Cl 150 Flange
2 - Cl 300 Flange
3 - Cl 300 Flange
4*- Cl 600 Flange
5 - Cl 900 Flange
6 - Cl 1500 Flange
7 - Cl 2500 Flange
*Except for Style JOS-H
with open bonnet,
carbon steel spring may
be used to
+650F(+343C)
When ordering soft seats,
specify material.
Caps and
Lifting Levers
(Type)
Type J - (Standard)
screwed cap
Type K - Screwed cap
with test rod
Type C- Regular lifting
lever(6)
Type D- Packed lifting
lever(6)
Type E- Packed lifting
lever with
test rod(6)
Type L- Bolted cap
Type M- Bolted cap
with test rod
Special top constructions
are also available such as
Type F - Air Operated
Lifting Device
Optional Caps for
Height Restricted
Applications
Type A- Screwed cap
Type B- Screwed cap
with test rod
Type G- Bolted cap
Type H- Bolted cap
with test rod
Available Options:
O-ring soft seats
Flange facings such as ring type joint
Sour gas service materials and certifications
Special Cl 300 outlets (where not standard)
Special Teflon (FEP) bellows coating
Special spring coatings or plating
Block bodies
Bonnet and cap inside painting
or plastic coating
Bug screens
Special materials not cataloged
Flanges to international standards
Special flanges
Stellited nozzle and disc insert
Special casting or machined
surface tests
Special cleaning
Special painting or coatings
Special Testing
Steam jacketed bodies
Supplementary loading
CAUTION!
Refer to pages 14 through 43 to verify that the
JOS/JBS/JLT model number specified is available in the size, style and pressure/temperature
rating combination selected.
How to Order
Examples:
(1) To specify a G orifice (0.503 sq.in.) (325 sq.mm) Style JOS conventional valve
with standard materials for liquid service at 700 psig (48.2 barg) and at +700F
(+371C) with a packed lifting lever, the following designation applies:
1-1/2 G 2-1/2 JLT-JOS-46 - D
(2) To specify an M orifice (3.60 sq.in.)(2323 sq.mm) Style JBS bellows valve with
back pressure balancing piston, Monel nozzle and disc insert, and Kalrez O-ring
soft seats for gas service at 200 psig (13.7 barg) and +400F (+204C) with
screwed cap and test rod, the following designation applies:
4M6 JBS-BP-25-M1 - K with Kalrez
(3) To specify a K orifice (1.838 sq.in.)(1186 sq.mm) Style JOS conventional valve
with open bonnet and standard materials for ASME Code Section VIII steam
service at 600 psig (41.3 barg) and +600F (+316C) with a regular lifting lever,
the following designation applies:
3K4 JOS-H-45-C
8
Please refer to Warranty and Warnings on page 63.
Notes:
(1) Style designations "JLT-JOS," "JLT-JBS," or
"JLT-JBS-BP" signify Styles JOS, JBS or JBS-BP
with liquid trim for liquid service.
(2) Upper temperature limit is +650F (+343C) for
Style JOS-H open bonnet valve for ASME Code
Section VIII steam service.
(3) See pages 14-43 for appropriate maximum set
pressures and temperatures.
(4) See pages 10-13 for complete listings of materials
of construction.
(5) Larger sizes are available. Ask for Catalog No. 307.
(6) ASME Code Section VIII rules require that pressure
relief valves for water service over +140F (+60C),
steam and air shall have a lifting device.
O-Ring Soft Seat Materials and Pressure/Temperature Limits
SET PRESSURE barg
1.03
500
6.90
34.5
69.0
Kalrez (90)
TFE
102
TFE
400
204
Kalrez (80)
Silicone (80)
Viton (75)
TFE
300
200
Kalrez (90)
Viton (90)
TFE
93
Buna N(70)
EPR (80)
Kalrez (80)
Silicone (70)
Viton (75)
TFE
100
50
Buna N (90)
EPR (90)
Kalrez (90)
Viton (90)
TFE
Buna N (60)
EPR (70)
Silicone (50)
0
-50
-150
15
260
100
Buna N (70)
EPR (70)
Silicone (70)
TFE
Buna N(90)
EPR (90)
Silicone (80)
TFE
TFE
TFE
200
300
400
500
600
700
800
900
1000
-17
-45
1200
1400
-101
SET PRESSURE psig
EPR = Ethylene Propylene Rubber
Note: Other soft seat materials are available on request.
For O-ring seats below -150F (-101C) consult Crosby.
For steam service, metal-to-metal seats are recommended; consult Crosby if soft seats are required.
MAXIMUM SET
PRESSURE LIMITS
ORIFICE
JLT O-Ring
Soft Seat
JOS/JBS O-Ring
Soft Seat
D
E
F
G
H
J
K
L
M
N
P
Q
R
T
T2
MAXIMUM SET
PRESSURE
psig
1480
1480
1480
1480
1480
1480
1480
1000
1100
1000
1000
600
300
300
300
Please refer to Warranty and Warnings on page 63.
barg
102
102
102
102
102
102
102
68.9
75.8
68.9
68.9
41.3
20.6
20.6
20.6
9
JOS/JBS/JLT Valve Materials
Standard Materials - Body/Bonnet/Spring Materials per API Standard 526(5)
Ref.
No.
JOS/JBS ( )5
-20F to +450F
(-29C to +232C)
JOS/JBS ( )6
+451F to +800F
(+233C to +427C)
JOS/JBS ( )7
+801F to +1000F
(+428C to +538C)
JOS/JBS ( )4
-75F to -21F
(-59C to -30C)
JOS/JBS ( )2
-450F to -76F
(-268C to -60C)
Body
Carbon Steel
SA-216 Gr. WCB
Carbon Steel
SA-216 Gr. WCB
Chrome Moly Steel
SA-217 Gr. WC6
316 St.St.
SA-351 Gr. CF8M
316 St. St.
SA-351 Gr. CF8M
Nozzle
Nozzle Ring
Set Screw
Disc Holder
Disc Holder
Bellows Top Flange(12)
Bellows
Disc Insert
Retainer Screw(s)
O-Ring Retainer
O-Ring (7)
Guide
Spindle
Spindle Cotter Pins
316 St.St.
316 St.St.
416 St.St.
316L St.St.
316L St.St.
316L St.St.
316L St.St.
316 St.St. (6)
316 St.St.
316 St.St.
Specify
St.St. (1)
416 St.St. (2)
Stainless Steel
316 St.St.
316 St.St.
416 St.St.
316L St.St.
316L St.St.
316L St.St.
316L St.St.
316 St.St.(6)
316 St.St.
316 St.St.
Specify
St.St. (1)
416 St.St. (2)
Stainless Steel
316 St.St.
316 St.St.
416 St.St.
316L St.St.
316L St.St.
316L St.St.
316L St.St.
316 St.St. (6)
316 St.St.
316 St.St.
Specify
St.St. (1)
416 St.St. (2)
Stainless Steel
316 St.St.
316 St.St.
416 St.St.
316L St.St.
316L St.St.
316L St.St.
316L St.St.
316 St.St.
316 St.St.
316 St.St.
Specify
St.St. (1)
416 St.St.
Stainless Steel
316 St.St.
316 St.St.
316 St.St.
316L St.St.
316L St.St.
316L St.St.
316L St.St.
316 St.St.
316 St.St.
316 St.St.
Specify
St.St. (1)
316 St.St.
Stainless Steel
Carbon St. (3)
Alloy St. (3)(8)
Alloy St. (3)(8)
Part Name
1
2
3
4
+ 5
+• 5A
+• 5B
+• 5C
+6, +6A
+ 6B
+ 6C
+ 7
8
9
9A
10
Spring
11
Spring Washer(s)
12
Bonnet
13
14
15
16
17
+ 20
+ 21
22
Bonnet Stud
Bonnet Nut
Adjusting Bolt
Adj. Bolt Nut
Pipe Plug (Bonnet)
Set Screw Gasket
Guide Gasket
Seal & Wire
23
24
+ 25
Seal Clip
Type J Cap
Cap Gasket
Carbon St.
(3)
316 St.St.
Steel
Steel
Steel
Steel
316 St.St.
Carbon St.
SA-216 Gr. WCB
Carbon St.
SA-216 Gr. WCB
Chrome Moly St.
SA-217 Gr. WC6
316 St.St.
SA-351 Gr. CF8M
316 St.St.
SA-351 Gr. CF8M
Alloy St.(4)
Steel
416 St.St.
Steel
Steel
Alloy St. (4)
Steel
416 St.St.
Steel
Steel
Alloy St. (4)
Steel
416 St.St.
Steel
Steel
304 St.St.
304 St.St.
416 St.St.
316 St.St.
316 St.St.
304 St.St.
304 St.St.
316 St.St.
316 St.St.
316 St.St.
*
*
*
*
*
*
*
*
*
*
Lead &
St.St.
St.St.
Carbon St.
Lead &
St.St.
St.St.
Carbon St.
Lead &
St.St.
St.St.
Carbon St.
Lead &
St.St.
St. St.
316 St.St.
Lead &
St.St.
St. St.
316 St.St.
*
*
*
*
*
6C
24
23 22 25
15
6A
7
16
11
12
10
Note: This vent
must remain
open on JBS
construction
17 (JOS only)
9
13
21
14
21
6B
2
Style JLT
O-Ring Soft Seat
21
8
5B
6
20
5
4
3
9A
5C
5A
22
1
2
Style JOS
10
Cotter pins used in L
orifice and above only.
Please refer to Warranty and Warnings on page 63.
Style JBS
(with bellows)
Variations From Standard Materials
Monel
316 Stainless Steel
( )( ) S4
( )( ) S
( )( ) M1
Carbon Steel
SA-216
Gr. WCB
316 St.St.
SA-351
Gr. CF8M
Carbon Steel
SA-216
Gr. WCB
316 St.St.
316 St.St.
316 St.St.
316L St.St.
316L St.St.
316L St.St.
316L St.St.
316 St.St.(6)
316 St.St.
316 St.St.
Specify
St.St.(1)
316 St.St.
Stainless
Steel
Carbon St.(3)
or Alloy
Steel (3)(8)
316 St.St.
316 St.St.
316 St.St.
316 St.St.
316L St.St.
316L St.St.
316L St.St.
316L St.St.
316 St.St. (6)
316 St.St.
316 St.St.
Specify
St.St. (1)
316 St.St.
Stainless
Steel
316 St.St.
or Inconel
X750 (10)
316 St.St.
( )( ) M4
Hastelloy
( )( ) M5
( )( ) M
Carbon St.
Monel
Monel
SA-216 ASTM A 494 ASTM A 494
Gr. WCB Gr. M35-1(11) Gr. M35-1(11)
Monel
Monel
Monel
316 St.St.
Monel
Monel
416 St.St.
Monel
Monel
316L St.St.
Monel
Monel
316L St.St.
Monel
Monel
316L St.St.
Monel
Monel
316L St.St.
Monel
Monel
Monel
Monel
Monel
Monel
Monel
Monel
Monel
Monel
Monel
Specify
Specify
Specify
St.St. (1)
Monel
Monel
416 St.St.(2)
Monel
Monel
Stainless
Monel
Monel
Steel
Carbon St.(3) Carbon St. Carbon St.
or
Nickel
Nickel
Alloy St.(3)(8) Plated (9)
Plated (9)
Steel
316 St.St. 316 St.St.
Monel
Monel
Monel
Monel
Monel
Monel
Monel
Monel
Monel
Monel
Specify
Monel
Monel
Monel
Monel
or Inconel
X750
Monel
( )( ) H1
Carbon St.
SA-216
Gr. WCB
Hast. C
316 St.St.
416 St.St.
316L St.St.
316L St.St.
316L St.St.
316L St.St.
Hast. C
Hast. C
Hast. C
Specify
St.St. (1)
416 St.St.(2)
Stainless
Steel
Carbon St. (3)
or
Alloy St.(3)(8)
Steel
( )( ) H4
( )( ) H5
( )( ) H
Ref.
No.
Carbon St.
Hast. C
Hast. C
SA-216
SA-494
SA-494
Gr. WCB Gr. CW-12MW
Gr.
CW-12MW
Hast. C
Hast. C
Monel
Hast. C
Hast. C
Hast. C
Hast. C
Hast. C
Hast. C
Hast. C
Specify
Hast. C
Monel
Monel
Hast. C
Hast. C
Hast. C
Hast. C
Hast. C
Hast. C
Hast. C
Hast. C
Hast. C
Hast. C
Specify
Hast. C
Hast. C
Hastelloy
or Monel
Carbon St. Carbon St.
Nickel
Nickel
Plated (9)
Plated (9)
316 St.St. 316 St.St.
1
Hast. C
2
Hast. C
3
Hast. C
4
Hast. C +
5
Hast. C + • 5A
Hast. C + • 5B
Hast. C + • 5C
Hast. C +6,+6A
Hast. C + 6B
Hast. C + 6C
Specify +
7
Hast. C
8
Hast. C
9
Hastelloy
9A
or Monel
Hast. C
10
Hast.C
11
Carbon St.
SA-216
Gr. WCB
316 St. St.
SA-351
Gr. CF8M
Carbon St.
SA-216
Gr. WCB
Carbon St.
Monel
Monel
SA-216 ASTM A 494 ASTM A 494
Gr. WCB Gr. M35-1(11) Gr. M35-1 (11)
Carbon St.
SA-216
Gr. WCB
Carbon St.
Hast. C
Hast. C
SA-216
SA-494
SA-494
Gr. WCB Gr. CW-12MW
Gr.
CW-12MW
12
Alloy St.(4)
Steel
316 St.St.
316 St.St.
Steel
304
304
316
316
316
Alloy St.(4)
Steel
416 St. St.
Steel
Steel
Alloy St. (4) 304 St.St.
Steel
304 St.St.
Monel
Monel
Monel
Monel
Steel
Monel
304 St.St.
304 St.St.
Monel
Monel
Monel
Alloy St. (4)
Steel
416 St.St.
Steel
Steel
Alloy St. (4)
Steel
Monel
Monel
Steel
Hast. C
Hast. C
Hast. C
Hast. C
Hastelloy
Hast. C
Hast. C
Hast. C
Hast. C
Hastelloy
13
14
15
16
17
20
21
22
St.St.
St.St.
St.St.
St.St.
St.St.
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
Lead &
St.St.
St.St.
Carbon St.
Lead &
St.St.
St.St.
316 St.St.
Lead &
St.St.
St.St.
Carbon St.
Lead &
St.St.
St.St.
Carbon St.
Lead &
St.St.
St.St.
Monel
Lead &
St.St.
St. St.
Monel
Lead &
St.St.
St.St.
Carbon St.
Lead &
St.St.
St.St.
Carbon St.
Lead &
St.St.
St.St.
Hast. C
Lead &
St.St.
St.St.
Hast. C
*
*
*
*
*
*
*
*
*
*
+
+
+
23
24
25
Subassembly
+ Recommended spare parts
* Organic fiber non-asbestos
(1) Corrosion resistant stainless steel ASTM A 297 Gr. HE
(2) 17-4PH Spindle Point on D and E orifice Style JBS ( )5, 6 and 7 valves only.
(3) Corrosion resistant coating.
(4) ASME SA 193 Gr. B7
(5) Crosby may upgrade to an alternative material.
(6) 17-4PH stainless steel for steam service above 450 psig (31.03 barg).
(7) See page 9 for O-ring soft seat materials and pressure/temperature limits.
(8) Crosby may upgrade to Inconel X750.
(9) For temperatures above +450F (+232C), Crosby will supply either alloy steel nickel plated or Inconel X750 springs.
(10) Temperature limit for 316 stainless steel spring is +450F (+232C).
(11) Permitted by ASME Code Case 1750-10
(12) Top flange on D and E orifice bellows is 316 stainless steel.
Note: Cotter pins used to lock spindle into disc holder are in L orifice and above only.
Please refer to Warranty and Warnings on page 63.
11
Caps and Lifting Levers
DOG SHAFT
LEVER NUT
LEVER NUT
LOCKWASHER
PACKING GLAND
SLEEVE
PACKING GLAND
NUT
CAP
LEVER
PACKING GLAND
PACKING
CAP
DOG SHAFT
GASKET
SPINDLE
SEAL & WIRE
CAP PLUG
CAP GASKET
CAP
PLUG
GASKET
Screwed Cap
Type A
Type J
(Standard)
TEST ROD
Packed Lifting Lever
Type D
(Top View of Packing Gland
construction used for
special materials)
CAP OR
CAP TOP
SPINDLE
CAP
Type
Type
Type
Type
Type
CAP
SPINDLE
B
E
H
K
M
LEVER NUT
Cap and Test Rod
- Screwed Cap
- Packed Lifting Lever
- Bolted Cap
- Screwed Cap (Standard)
- Bolted Cap (Standard)
LEVER
LOCKWASHER
DOG SHAFT
BEARING
DOG
SHAFT
GASKET
O-RING
CAP STUD
NUT
CAP STUD
CAP
SEAL &
WIRE
DOG
VALVE
SPINDLE
Bolted Cap
Type G
Type L
(Standard)
Packed Lifting Lever
Type D
Top View
CAP
CAP TOP
SPINDLE NUT
COTTER PIN
FORKED
LEVER
COTTER
PIN
CAP TOP
GASKET
SPINDLE
NUT
COTTER
PIN
DOG
PIN
CAP
DOG
SHAFT
▲
CAP STUD
SPINDLE
PIN
CAP
STUD
NUT
ADJUSTING
BOLT
ADJ. BOLT
NUT
CAP SET SCREW
LEVER
Regular Lifting Lever
Type C
12
Please refer to Warranty and Warnings on page 63.
CAP GASKET
Packed Lifting Lever
Type D
SEAL &
WIRE
Styles JOS/JBS/JLT pressure relief valves are regularly furnished
with closed bonnet and screwed cap over the adjusting bolt. The
following types of top construction are available except where
otherwise indicated.
Screwed Cap (Type J Standard) - Where no lifting lever is
required.
TEST RODS:
Types K, E or M - Valves with screwed caps, packed lifting levers or
bolted caps can be fitted to accommodate test rods which will hold the
valve closed when the equipment on which they are installed is
hydrostatically tested.
Type J screwed cap changes to Type K with test rod.
Bolted Cap (Type L) - Where no lifting lever is required. Available
on special order.
Type D packed lifting lever changes to Type E with test rod.
LIFTING LEVERS:
Type L bolted cap changes to Type M with test rod.
Regular (Type C) - for steam and air service where the valve cap
is not required to be tight on the discharge side and where
conditions are such that periodic testing is desirable. Regular lifting
levers may be furnished with a supplementary gagging device on
special order.
Packed (Type D) - For services where tightness on the discharge
side is necessary and where conditions are such that periodic
testing is desirable. Also recommended for hot water services.
Caps and Lifting Lever Materials
STANDARD
MATERIAL
Ref.
No.
Part Name
HEIGHT RESTRICTED APPLICATIONS:
For applications where there are height restrictions, cap types A,B,G
and H are available.
CAUTION: Test rods should never be tightened more than
fingertight. Overtightening may damage internal parts. Moreover, a test rod should never be kept on the valve during
operation of the equipment. During normal operation the
test rod is replaced with cap plug and gasket to maintain
tightness on the discharge side.
VARIATIONS FROM STANDARD MATERIALS
JOS/JBS-( )5,6,7
JOS/JBS-( )4
JOS/JBS-( )2
-20F to +1000F
-75F to -21F
-450F to -76F
(-29C to +538C)
(-59C to -30C)
(-268C to -60C)
( )( )S
( )( )S4
( )( )M &
( )( )M5†
( )( )M4 &
( )( )H4†
( )( )H &
( )H5†
24
Cap(J,K,D,
Carbon
316 St.St.
316 St.St. 316 St.St.
Carbon
Monel
Carbon
Hastelloy C
E,L and M)
Steel
Steel
Steel
Cap (C)
Malleable Iron Malleable Iron 316 St.St. 316 St.St. Malleable Iron
Monel
Malleable Iron Hastelloy C
36
Cap Top(D,E)
Steel
316 St.St.
316 St.St. 316 St.St.
Steel
Monel
Steel
Hastelloy C
31 Cap Set Screw(C)
St.St.
St.St.
St.St.
St.St.
St.St.
St.St.
St.St.
Hastelloy C
40
Cap Stud
Alloy Steel
304 St.St.
304 St.St. 304 St.St. Alloy Steel
304 St.St.
Alloy Steel Hastelloy C
41
Cap Stud Nut
Steel
304 St.St.
304 St.St. 304 St.St.
Steel
304 St.St.
Steel
Hastelloy C
48
Lever (D & E)
Steel
Steel
316 St.St. 316 St.St.
Steel
316 St.St.
Steel
316 St.St.
32,
Lever(C),
Malleable Iron Malleable Iron 316 St.St. 316 St.St. Malleable Iron 316 St.St. Malleable Iron 316 St.St.
35 Forked Lever (C)
33
Pin(Lever,
Steel
Steel
St.St.
St.St.
Steel
316 St.St.
Steel
St.St.
Forked Lever)
34
Cotter Pins
Steel
Steel
St.St.
St.St.
Steel
St.St.
Steel
St.St.
49
Lever Nut
Steel
Steel
316 St.St. 316 St.St.
316 St.St.
St.St.
316 St.St.
316 St.St.
(D&E)
50
Lever Nut
Steel
Steel
St.St.
St.St.
Steel
St.St.
Steel
St.St.
Lockwasher
30
Spindle Nut
Steel
Steel
316 St.St. 316 St.St.
316 St.St.
Monel
Monel
Hastelloy C
38
Dog
Steel
Steel
316 St.St. 316 St.St.
316 St.St.
Monel
Monel
Hastelloy C
39
Dog Shaft
416 St.St.
416 St.St.
316 St.St. 316 St.St.
316 St.St.
Monel
Monel
Hastelloy C
46
Dog Shaft
416 St.St.
416 St.St.
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Bearing
45
Dog Shaft
Viton
Viton
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Bearing O-Ring
57
Packing Gland
Note 1
Note 1
316 St.St. 316 St.St.
316 St.St.
Monel
Monel
Monel
58
Packing
Note 1
Note 1
316 St.St. 316 St.St.
416 St.St.
Monel
416 St.St.
Monel
Gland Sleeve
59
Packing
Note 1
Note 1
316 St.St. 316 St.St.
Steel
Monel
Steel
Monel
Gland Nut
56
Packing
Note 1
Note 1
Teflon
Teflon
Teflon
Teflon
Teflon
Teflon
27 Test Rod (K,E,M) 416 St.St.
416 St.St.
416 St.St. 416 St.St.
416 St.St.
416 St.St.
416 St.St.
416 St.St.
28 Cap Plug (K,E,M) 416 St.St.
416 St.St.
316 St.St. 316 St.St.
416 St.St.
Monel
416 St.St. Hastelloy C
25,29
Gaskets
37,47
*
*
*
*
*
*
*
*
†Special material valves ( )( )M1 and ( )( )H1 use caps and lifting gear of standard materials.
Organic Fiber Non-Asbestos
*Note
1: Packing gland construction is standard for special material valves.
Please refer to Warranty and Warnings on page 63.
13
Specifications - Crosby Styles JOS, JBS, JLT and JOS-H
D Orifice
0.110 sq. in.
(71 sq. mm)
Effective Area
Valve Size
Inlet
x
Orifice
x
Outlet
Valve
Style
JOSJBSJLT*JOS-H-
Back Press.
Limit @100F
psig
Maximum Set Pressure - psig
Standard
Connections
ANSIFlanges
RaisedFace
Inlet
Inlet Outlet
-450F
to
-76F
-75F -20F
to
to
-21F +100F
*
+450F +800F +1000F
153
255
413
)
600
600
740
600
600
600
16
26
36
46
150
300
300
600
150
150
150
150
185
285
615
1235
80
285
410
825
285
285
285
285
230
230
230
230
56 11/2D2
900
66 11/2D2 1500
76 11/2D21/2 2500
300
300
300
1845 1235
3080 2060
5135 3430
600
600
740
600
600
600
37
47
300
600
150
150
510
1015
225
445
285
285
230
230
JOSJBSJLT-
57 11/2D2
900
67 11/2D2 1500
77 11/2D21/2 2500
300
300
300
1525 670
2540 1115
4230 1860
600
600
740
600
600
600
JOSJBSJLT-
14
24
34
44
1D2
1D2
1D2
1D2
150
300
300
600
150
150
150
150
275
275
275
275
230
230
230
230
JOSJBSJLT-
12
22
32
42
1D2
1D2
1D2
1D2
150
300
300
600
150 275
150 275
150 720
150 1440
275
275
275
275
230
230
230
230
1D2
1D2
275
275
720
1440
-29C
*
to +232C +427C +538C
+38C
19.6
19.6
51.0
102
2220) 1845
3705) 3080
6000) 5135
JOSJBSJLTJOS-H-
-59C
to
-30C
230
230
230
230
300
300
300
JOSJBSJLT-
-268C
to
-60C
285
285
285
285
55 11/2D2
900
65 11/2D2 1500
1
1
75 1 /2D2 /2 2500
1D2
1D2
1D2
1D2
Inlet
JBS
†
285) 185
285) 285
740) 615
1480) 1235
)
Maximum Set Pressure - barg
JOS
†
150
150
150
150
JOSJBSJLTJOS-H-
1D2
1D2
1D2
1D2
Sizes and Pressure/Temperature Limits
(See also Set Pressure Chart Opposite)
150
300
300
600
JOSJBSJLT-
15
25
35
45
Low Set Pressure Limits:
JOS = 10 psig (0.68 barg)
JBS = 25 psig (1.72 barg)
JLT-JOS = 15 psig (1.03 barg)
JLT-JBS = 25 psig (1.72 barg)
12.7
19.6
42.4
85.1
127
212
354
12.7
19.6
42.4
85.1
127
212
354
Back Press.
Limit@38C
barg
JOS
†
JBS
†
19.6
19.6
19.6
19.6
15.8
15.8
15.8
15.8
41.3 41.3
41.3 41.3
51.0 41.3
5.51
19.6
28.2
56.8
85.1
142
236
19.6
19.6
19.6
19.6
15.8
15.8
15.8
15.8
41.3 41.3
41.3 41.3
51.0 41.3
35.1 15.5 19.6 15.8
69.9 )30.6 19.6 15.8
105
175
291
18.9
18.9
49.6
99.2
)
18.9
18.9
)
49.6
99.2
46.1 41.3 41.3
76.8 41.3 41.3
128
51.0 41.3
18.9
18.9
18.9
18.9
15.8
15.8
15.8
15.8
18.9
18.9
18.9
18.9
15.8
15.8
15.8
15.8
*Upper temperature limit of JOS-H-15, 25, 35 and 45 valves is +650F (+343C).
†Outlet pressure for temperatures above +100F (+38C) should not exceed the ANSI flange rating.
Valves set below 15 psig (1.03 barg) cannot be stamped with the ASME Code Symbol. Only metal seated valves may be set below 15 psig.
Dimensions and Weights
Valve
Style
JOSJBSJLTJOS-H-
JOSJBSJLT-
14
12,14,15,16,
22,24,25,26
32,34,35,36,37
42,44,45,46,47
55,56,57,65,66,67
75,76,77
D Orifice
Valve Dimensions - in. (mm)
Center to Face
Use To
Approximate Height
Inlet
Outlet
Find Bolt
Length
Valve (Cap) Type
E
F
X
J&L
C
D
4-1/8
(105)
4-1/8
(105)
4-1/8
(105)
4-1/8
(105)
5-1/2
(140)
4-1/2
(114)
4-1/2
(114)
4-1/2
(114)
5-1/2
(140)
6-1/2
(165)
1-9/16
(40)
1-9/16
(40)
1-9/16
(40)
2
(51)
2-1/2
(64)
19-3/4
(502)
19-3/4
(502)
19-3/4
(502)
20-1/2
(521)
21-3/4
(552)
Please refer to Warranty and Warnings on page 63.
19
(483)
19
(483)
19
(483)
19-3/4
(502)
21
(533)
19-1/2
(495)
19-1/2
(495)
19-1/2
(495)
20-1/4
(514)
21-1/2
(546)
Approx.
Weight
lbs(kg)
Type
J
36
(16)
36
(16)
36
(16)
65
(29)
75
(34)
TYPE J (SCREWED CAP)
TYPE C (REGULAR LIFTING LEVER)
(also JOS-H)
TYPE D (PACKED LIFTING LEVER)
TYPE L (BOLTED CAP)
Pressure-Temperature Limit Chart - To ANSI Cl 600
SET PRESSURE - barg
1000
500
900
D Orifice
0.110 sq. in.
(71 sq.mm)
Effective Area
800
400
700
600
300
500
400
200
300
100
200
100
0
0
•
-100
-100
-200
-300
-200
-400
-450
SET PRESSURE - psig
Pressure-Temperature Limit Chart - ANSI Cl 900, Cl 1500, Cl 2500
SET PRESSURE - barg
SET PRESSURE - psig
Please refer to Warranty and Warnings on page 63.
15
Specifications - Crosby Styles JOS, JBS, JLT and JOS-H
E Orifice
0.196 sq. in.
(126 sq. mm)
Effective Area
ValveSize
Inlet
x
Orifice
x
Outlet
Valve
Style
JOSJBSJLT*JOS-HJOSJBSJLTJOSJBSJLTJOS-HJOSJBSJLTJOSJBSJLTJOS-H-
15
25
35
45
1E2
1E2
1E2
1E2
Sizes and Pressure/Temperature Limits
(See also Set Pressure Chart Opposite)
Standard
Connections
ANSIFlanges
Raised Face
Inlet Outlet
150
300
300
600
1E2
1E2
1E2
1E2
150
300
300
600
Inlet
-450F
to
-76F
-75F -20F
to
to
-21F +100F
150
150
150
150
285)
285)
740)
1480)
150
150
150
150
56 11/ 2E2 900 300
66 11/ 2E2 1500 300
76 11/2E21/2 2500 300
37
47
1E2
1E2
Back Press.
Limit@100F
psig
Maximum Set Pressure - psig
55 11/ 2E2 900 300
65 11/ 2E2 1500 300
75 11/2E21/2 2500 300
16
26
36
46
Low Set Pressure Limits:
JOS = 8 psig (0.55 barg)
JBS = 25 psig (1.72 barg)
JLT-JOS = 15 psig (1.03 barg)
JLT-JBS = 25 psig (1.72 barg)
300 150
600 150
JOSJBSJLT-
57 11/ 2E2 900 300
67 11/ 2E2 1500 300
77 11/2E21/2 2500 300
JOSJBSJLT-
14
24
34
44
1E2
1E2
1E2
1E2
150
300
300
600
150
150
150
150
JOSJBSJLT-
12
22
32
42
1E2
1E2
1E2
1E2
150
300
300
600
150 275
150 275
150 720
150 1440
*
Inlet
-268C
to
-60C
-59C
to
-30C
-29C
*
to +232C +427C +538C
+38C
+450F +800F +1000F JOS
†
JBS
†
185
285
615
1235
285
285
285
285
230
230
230
230
19.6
19.6
51.0
102
153
255
413
)
2220) 1845
3705) 3080
6000) 5135
)
600
600
740
600
600
600
185
285
615
1235
80
285
410
825
285
285
285
285
230
230
230
230
1845 1235
3080 2060
5135 3430
600
600
740
600
600
600
510
1015
225 285
445 285
230
230
1525 670 600
2540 1115 600
4230 1860 740
600
600
600
275
275
275
275
230
230
230
230
275
275
275
275
230
230
230
230
275
275
720
1440
Back Press.
Limit @38C
barg
Maximum Set Pressure - barg
12.7
19.6
42.4
85.1
127
212
354
JBS
†
19.6
19.6
19.6
19.6
15.8
15.8
15.8
15.8
41.3 41.3
41.3 41.3
51.0 41.3
12.7
19.6
42.4
85.1
127
212
354
5.51
19.6
28.2
56.8
)
18.9
)
18.9
49.6
99.2
19.6
19.6
19.6
19.6
15.8
15.8
15.8
15.8
85.1
142
236
41.3 41.3
41.3 41.3
51.0 41.3
35.1
69.9
15.5 19.6 15.8
30.6
19.6 15.8
)
105
175
291
18.9
18.9
49.6
99.2
JOS
†
46.1 41.3 41.3
76.8 41.3 41.3
128
51.0 41.3
18.9
18.9
18.9
18.9
15.8
15.8
15.8
15.8
18.9
18.9
18.9
18.9
15.8
15.8
15.8
15.8
*Upper temperature limit of JOS-H-15, 25, 35 and 45 valves is +650F (+343C).
†Outlet pressure for temperatures above +100F (+38C) should not exceed the ANSI flange rating.
Valves set below 15 psig (1.03 barg) cannot be stamped with the ASME Code Symbol. Only metal seated valves may be set below 15 psig.
Dimensions and Weights
Valve
Style
12,14,15,16,
22,24,25,26
32,34,35,36,37
JOSJBSJLTJOS-H- 42,44,45,46,47
JOSJBSJLT-
16
55,56,57,65,66,67
75,76,77
Valve Dimensions - in. (mm)
Center to Face
Use To
Approximate Height
Inlet
Outlet Find Bolt
Length
Valve (Cap) Type
E
F
X
J&L
C
D
4-1/8
4-1/2
1-9/16
19-3/4
19
19-1/2
(105)
(114)
(40)
(502)
(483)
(495)
4-1/8
4-1/2
1-9/16
19-3/4
19
19-1/2
(105)
(114)
(40)
(502)
(483)
(495)
4-1/8
4-1/2
1-9/16
19-3/4
19
19-1/2
(105)
(114)
(40)
(502)
(483)
(495)
4-1/8
5-1/2
2
20-1/2
19 3/4 20-1/4
(105)
(140)
(51)
(521)
(502)
(514)
5-1/2
6-1/2
2-1/2
21-3/4
21
21-1/2
(140)
(165)
(64)
(532)
(533)
(546)
Please refer to Warranty and Warnings on page 63.
E Orifice
Approx.
Weight
lbs(kg)
Type
J
36
(16)
36
(16)
36
(16)
65
(29)
75
(34)
TYPE J (SCREWED CAP)
TYPE C (REGULAR LIFTING LEVER)
(also JOS-H)
TYPE D (PACKED LIFTING LEVER)
TYPE L (BOLTED CAP)
Pressure-Temperature Limit Chart - To ANSI Cl 600
E Orifice
0.196 sq. in.
(126 sq.mm)
Effective Area
SET PRESSURE - barg
1000
500
900
800
400
700
600
300
500
400
200
300
100
200
100
0
0
•
-100
-100
-200
-300
-200
-400
-450
SET PRESSURE - psig
Pressure-Temperature Limit Chart - ANSI Cl 900, Cl 1500, Cl 2500
SET PRESSURE - barg
SET PRESSURE - psig
Please refer to Warranty and Warnings on page 63.
17
Specifications - Crosby Styles JOS, JBS, JLT and JOS-H
F Orifice
0.307 sq. in.
(198 sq. mm)
Effective Area
Valve
Style
JOSJBSJLT*JOS-HJOSJBSJLTJOSJBSJLTJOS-HJOSJBSJLTJOSJBSJLTJOS-H-
15
25
35
45
Sizes and Pressure/Temperature Limits
(See also Set Pressure Chart Opposite)
ValveSize
Inlet
x
Orifice
x
Outlet
Standard
Connections
ANSIFlanges
RaisedFace
11/2F2
11/2F2
11/2F2
11/2F2
150
300
300
600
Inlet
Inlet Outlet
-450F
to
-76F
-75F -20F
to
to
-21F +100F
*
+450F +800F +1000F
285) 185
285) 285
740) 615
1480) 1235
55 1 /2F2 /2 900 300
65 11/2F21/2 1500 300
75 11/2F21/2 2500 300
2220) 1845
3705) 3080
5000) 5000
)
185
285
615
1235
80
285
410
825
16
26
36
46
1
11/2F2
11/2F2
11/2F2
11/2F2
150
300
300
600
150
150
150
150
56 11/2F21/2 900 300
66 11/2F21/2 1500 300
76 11/2F21/2 2500 300
37
47
11/2F2
11/2F2
57 11/2F21/2 900 300
67 11/2F21/2 1500 300
77 11/2F21/2 2500 300
JOSJBSJLT-
14
24
34
44
12
22
32
42
11/2F2
11/2F2
11/2F2
11/2F2
1
1 /2F2
11/2F2
11/2F2
11/2F2
150
300
300
600
150
150
150
150
150
300
300
600
150 275
150 275
150 720
150 1440
)
510
1015
JOS
†
JBS
†
285
285
285
285
230
230
230
230
285
285
285
285
Inlet
-268C
to
-60C
-59C
to
-30C
-29C
*
to +232C +427C +538C
+38C
19.6
19.6
51.0
102
153
255
344
1525 670
2540 1115
4230 1860
740 500
740 500
740 500
275
275
720
1440
275
275
275
275
230
230
230
230
275
275
275
275
230
230
230
230
JBS
†
19.6
19.6
19.6
19.6
15.8
15.8
15.8
15.8
51.0
51.0
51.0
34.4
34.4
34.4
5.5
19.6
28.2
56.8
19.6
19.6
19.6
19.6
15.8
15.8
15.8
15.8
85.1
142
236
51.0
51.0
51.0
34.4
34.4
34.4
35.1
69.9
15.5 19.6
30.6
)
19.6
15.8
15.8
46.1 51.0
76.8 51.0
128
51.0
34.4
34.4
34.4
18.9
18.9
18.9
18.9
15.8
15.8
15.8
15.8
18.9
18.9
18.9
18.9
15.8
15.8
15.8
15.8
12.7
19.6
42.4
85.1
12.7
19.6
42.4
85.1
740 500
740 500
740 500
285 230
285 230
JOS
†
127
212
344
230
230
230
230
225
445
Back Press.
Limit @38C
barg
Maximum Set Pressure - barg
740 500
740 500
740 500
1845 1235
3080 2060
5000 3430
300 150
600 150
JOSJBSJLT-
JOSJBSJLT-
Back Press.
Limit@100F
psig
Maximum Set Pressure - psig
150
150
150
150
1
Low Set Pressure Limits:
JOS = 5 psig (0.34 barg)
JBS = 10 psig (0.68 barg)
JLT-JOS = 15 psig (1.03 barg)
JLT-JBS = 25 psig (1.72 barg)
127
212
344
105
175
291
18.9
18.9
49.6
99.2
)
18.9
18.9)
49.6
99.2
*Upper temperature limit of JOS-H-15, 25, 35 and 45 valves is +650F (+343C).
†Outlet pressure for temperatures above +100F (+38C) should not exceed the ANSI flange rating.
Valves set below 15 psig (1.03 barg) cannot be stamped with the ASME Code Symbol. Only metal seated valves may be set below 15 psig.
Dimensions and Weights
Valve
Style
12,14,15,16
22,24,25,26
32,34,35,36,37
JOSJBSJLTJOS-H-
42,44,45,46,47
55,56,57,65,66,67
75,76,77
18
F Orifice
Valve Dimensions - in. (mm)
Center to Face Use To
Approximate Height
Inlet
Outlet Find Bolt
Length
Valve (Cap) Type
E
F
X
J&L
C
D
4-7/8
(124)
4-7/8
(124)
4-7/8
(124)
4-7/8
(124)
5-1/2
(140)
4-3/4
(121)
6
(152)
6
(152)
6
(152)
6-1/2
(165)
1-3/4
(44)
1-3/4
(44)
1-3/4
(44)
2
(51)
2-1/2
(64)
23-1/4
(591)
23-1/4
(591)
23-1/4
(591)
23
(584)
26-3/4
(679)
Please refer to Warranty and Warnings on page 63.
22-1/2
(572)
22-1/2
(572)
22-1/2
(572)
21-1/4
(540)
26
(660)
23-1/4
(597)
23-1/4
(591)
23-1/4
(591)
21-3/4
(552)
26-3/4
(679)
Approx.
Weight
lbs(kg)
Type
J
50
(23)
50
(23)
50
(23)
65
(29)
85
(39)
TYPE J (SCREWED CAP)
TYPE C (REGULAR LIFTING LEVER)
(also JOS-H)
TYPE D (PACKED LIFTING LEVER)
TYPE L (BOLTED CAP)
Pressure-Temperature Limit Chart - To ANSI Cl 600
F Orifice
0.307 sq. in.
(198 sq.mm)
Effective Area
SET PRESSURE - barg
1000
500
900
800
400
700
600
300
500
400
200
300
100
200
100
0
0
•
-100
-100
-200
-300
-200
-400
-450
SET PRESSURE - psig
Pressure-Temperature Limit Chart - ANSI Cl 900, Cl 1500, Cl 2500
SET PRESSURE - barg
SET PRESSURE - psig
Please refer to Warranty and Warnings on page 63.
19
Specifications - Crosby Styles JOS, JBS, JLT and JOS-H
G Orifice
0.503 sq. in.
(325 sq. mm)
Effective Area
JOSJBSJLT*JOS-HJOSJBSJLTJOSJBSJLTJOS-HJOSJBSJLTJOSJBSJLTJOS-H-
Sizes and Pressure/Temperature Limits
(See also Set Pressure Chart Opposite)
ValveSize
Inlet
x
Orifice
x
Outlet
Valve
Style
15
25
35
45
11/2G21/2
11/2G21/2
11/2G21/2
11/2G21/2
Standard
Connections
ANSIFlanges
RaisedFace
Inlet Outlet
-450F
to
-76F
-75F -20F
to
to
-21F +100F
*
+450F +800F +1000F
55 1 /2G2 /2 900 300
65
2G3 1500 300
75
2G3 2500 300
2220) 1845
3705) 3080
3705) 3705
)
185
285
615
1235
80
285
410
825
1
11/2G21/2
11/2G21/2
11/2G21/2
11/2G21/2
150
300
300
600
150
150
150
150
56 11/2G21/2 900 300
66
2G3 1500 300
76
2G3 2500 300
37 11/2G21/2
47 11/2G21/2
57 11/2G21/2 900 300
67
2G3 1500 300
77
2G3 2500 300
JOSJBSJLT-
14
24
34
44
12
22
32
42
11/2G21/2
11/2G21/2
11/2G21/2
11/2G21/2
1
1
1 /2G2 /2
11/2G21/2
11/2G21/2
11/2G21/2
150
300
300
600
150
150
150
150
150
300
300
600
150 275
150 275
150 720
150 1440
)
510
1015
JOS
†
JBS
†
285
285
285
285
230
230
230
230
Maximum Set Pressure - barg
-268C -59C
to
to
-60C -30C
285
285
285
285
Inlet
-29C
*
to +232C +427C +538C
+38C
19.6
19.6
51.0
102
740 470
740 470
740 470
1845 1235
3080 2060
3705 3430
300 150
600 150
JOSJBSJLT-
JOSJBSJLT-
Inlet
285) 185
285) 285
740) 615
1480) 1235
16
26
36
46
150
300
300
600
Back Press.
Limit@100F
psig
Maximum Set Pressure - psig
150
150
150
150
1
Low Set Pressure Limits:
JOS = 5 psig (0.34 barg)
JBS = 15 psig (1.03 barg)
JLT-JOS = 15 psig (1.03 barg)
JLT-JBS = 25 psig (1.72 barg)
153
255
255
127
212
255
230
230
230
230
12.7
19.6
42.4
85.1
740 470
740 470
740 470
225
445
285 230
285 230
1525 670
2540 1115
3705 1860
740 470
740 470
740 470
275)
275)
720)
1440)
12.7
19.6
42.4
85.1
275
275
275
275
230
230
230
230
275
275
275
275
230
230
230
230
127
212
255
)
18.9
18.9)
49.6
99.2
JOS
†
JBS
†
19.6
19.6
19.6
19.6
15.8
15.8
15.8
15.8
51.0 32.4
51.0 32.4
51.0 32.4
5.51
19.6
28.2
56.8
19.6
19.6
19.6
19.6
15.8
15.8
15.8
15.8
85.1
142
236
51.0 32.4
51.0 32.4
51.0 32.4
35.1
69.9
15.5 19.6 15.8
30.6
) 19.6 15.8
105
175
255
18.9
18.9
49.6
99.2
Back Press.
Limit @38C
barg
46.1 51.0 32.4
76.8 51.0 32.4
128 51.0 32.4
18.9
18.9
18.9
18.9
15.8
15.8
15.8
15.8
18.9
18.9
18.9
18.9
15.8
15.8
15.8
15.8
*Upper temperature limit of JOS-H-15, 25, 35 and 45 valves is +650F (+343C).
†Outlet pressure for temperatures above +100F (+38C) should not exceed the ANSI flange rating.
Valves set below 15 psig (1.03 barg) cannot be stamped with the ASME Code Symbol. Only metal seated valves may be set below 15 psig.
Dimensions and Weights
Valve
Style
12,14,15,16
22,24,25,26
32,34,35,36
37,47
42,44,45,46
JOSJBSJLTJOS-H- 55,56,57
65,66,67,75,76,77
20
Valve Dimensions - in. (mm)
Center to Face Use To
Approximate Height
Inlet
Outlet Find Bolt
Length
Valve (Cap) Type
E
F
X
J&L
C
D
4-7/8
4-3/4
1-3/4
23-1/4
22-1/2
23-1/4
(124)
(121)
(44)
(591)
(572)
(591)
4-7/8
6
1-3/4
23-1/4
22-1/2
23-1/4
(124)
(152)
(44)
(591)
(572)
(591)
4-7/8
6
1-3/4
23-1/4
22-1/2
23-1/4
(124)
(152)
(44)
(591)
(572)
(591)
4-7/8
6
2
26
25-1/4
26
(124)
(152)
(51)
(660)
(641)
(660)
6-1/8
6-3/4
2-3/4
27
26-1/4
27
(156)
(171)
(70)
(686)
(667)
(686)
Please refer to Warranty and Warnings on page 63.
G Orifice
Approx.
Weight
lbs(kg)
Type
J
50
(23)
50
(23)
50
(23)
70
(32)
90
(41)
TYPE J (SCREWED CAP)
TYPE C (REGULAR LIFTING LEVER)
(also JOS-H)
TYPE D (PACKED LIFTING LEVER)
TYPE L (BOLTED CAP)
Pressure-Temperature Limit Chart - To ANSI Cl 600
G Orifice
0.503 sq. in.
(325 sq.mm)
Effective Area
SET PRESSURE - barg
1000
500
900
800
400
700
600
300
500
400
200
300
100
200
100
0
0
•
-100
-100
-200
-300
-200
-400
-450
SET PRESSURE - psig
Pressure-Temperature Limit Chart - ANSI Cl 900, Cl 1500, Cl 2500
SET PRESSURE - barg
SET PRESSURE - psig
Please refer to Warranty and Warnings on page 63.
21
Specifications - Crosby Styles JOS, JBS, JLT and JOS-H
H Orifice
.785 sq. in.
(506 sq. mm)
Effective Area
Valve
Style
Sizes and Pressure/Temperature Limits
(See also Set Pressure Chart Opposite)
ValveSize
Inlet
x
Orifice
x
Outlet
Inlet
Outlet
150
300
300
600
150
150
150
150
285 185
285 285
740 615
1480 1235
900 150
1500 300
2220 1845
2750 2750
)
185
285
615
1235
80
285
410
825
Standard
Connections
ANSIFlanges
RaisedFace
Inlet
-450F
to
-76F
-75F -20F
to
to
-21F +100F
*
+450F +800F +1000F
15
25
35
45
11/2H3
11/2H3
2H3
2H3
JOSJBSJLT-
55
65
2H3
2H3
JOSJBSJLTJOS-H-
16
26
36
46
11/2H3
11/2H3
2H3
2H3
JOSJBSJLT-
56
66
2H3
2H3
900 150
1500 300
1845 1235
2750 2060
JOSJBSJLTJOS-H-
37
47
2H3
2H3
300 150
600 150
510
815
JOSJBSJLT-
57
67
2H3
2H3
900 150
1500 300
JOSJBSJLT-
14
24
34
44
11/2H3
11/2H3
2H3
2H3
JOSJBSJLT-
12
22
32
42
1 /2H3
11/2H3
2H3
2H3
150
300
300
600
Back Press.
Limit@100F
psig
Maximum Set Pressure - psig
JOSJBSJLT*JOS-H-
1
Low Set Pressure Limits:
JOS = 5 psig (0.34 barg)
JBS = 10 psig (0.68 barg)
JLT-JOS = 15 psig (1.03 barg)
JLT-JBS = 25 psig (1.72 barg)
150
150
150
150
150
300
300
600
150
150
150
150
150
300
300
600
150 275
150 275
150 720
150 1440
)
JOS
†
JBS
†
285
285
285
285
230
230
230
230
Inlet
-268C -59C
to
to
-60C -30C
-29C
*
to +232C +427C +538C
+38C
19.6
19.6
51.0
102
285 230
740 415
285
285
285
285
Back Press.
Limit @38C
barg
Maximum Set Pressure - barg
153
189
12.7
19.6
42.4
85.1
127
189
230
230
230
230
12.7
19.6
42.4
85.1
285 230
740 415
127
189
JOS
†
JBS
†
19.6
19.6
19.6
19.6
15.8
15.8
15.8
15.8
19.6 15.8
51.0 28.6
5.51
19.6
28.2
56.8
19.6
19.6
19.6
19.6
15.8
15.8
15.8
15.8
85.1
142
19.6 15.8
51.0 28.6
225
445
285 230
285 230
35.1
56.2
15.5 19.6 15.8
)
30.6
19.6 15.8
1225 670
2040 1115
285 230
740 415
84.4
140
46.1 19.6 15.8
76.8 51.0 28.6
275
275
720
1440
275
275
275
275
230
230
230
230
275
275
275
275
230
230
230
230
18.9
18.9
49.6
99.2
)
18.9
)
18.9
49.6
99.2
18.9
18.9
18.9
18.9
15.8
15.8
15.8
15.8
18.9
18.9
18.9
18.9
15.8
15.8
15.8
15.8
*Upper temperature limit of JOS-H-15, 25, 35 and 45 valves is +650F (+343C).
†Outlet pressure for temperatures above +100F (+38C) should not exceed the ANSI flange rating.
Valves set below 15 psig (1.03 barg) cannot be stamped with the ASME Code Symbol. Only metal seated valves may be set below 15 psig.
Dimensions and Weights
Valve
Style
12,14,15,16
22,24,25,26
32,34,35,36
37,47
42,44,45,46
55,56,57,65,66,67
22
H Orifice
Valve Dimensions - in. (mm)
Center to Face
Use To
Approximate Height
Inlet
Outlet Find Bolt
Length
Valve (Cap) Type
E
F
X
J&L
C
D
5-1/8
(130)
5-1/8
(130)
6-1/16
(154)
6-1/16
(154)
4-7/8
(124)
4-7/8
(124)
6-3/8
(162)
6-3/8
(162)
1-11/16
(43)
1-13/16
(46)
1-13/16
(46)
2-5/16
(59)
23-1/2
(597)
23-1/2
(597)
26-3/4
(679)
28-1/4
(718)
Please refer to Warranty and Warnings on page 63.
22-3/4
(578)
22-3/4
(578)
26
(660)
27-1/2
(699)
23-1/4
(591)
23-1/4
(591)
26-3/4
(679)
28-1/4
(718)
Approx.
Weight
lbs(kg)
Type
J
55
(25)
60
(27)
75
(34)
110
(50)
TYPE J (SCREWED CAP)
TYPE C (REGULAR LIFTING LEVER)
(also JOS-H)
TYPE D (PACKED LIFTING LEVER)
TYPE L (BOLTED CAP)
Pressure-Temperature Limit Chart - To ANSI Cl 600
H Orifice
.785 sq. in.
(506 sq.mm)
Effective Area
SET PRESSURE - barg
1000
500
900
800
400
700
600
300
500
400
200
300
100
200
100
0
0
-100
-100
-200
-300
-200
-400
-450
SET PRESSURE - psig
Pressure-Temperature Limit Chart - ANSI Cl 900, Cl 1500
SET PRESSURE - barg
SET PRESSURE - psig
Please refer to Warranty and Warnings on page 63.
23
Specifications - Crosby Styles JOS, JBS, JLT and JOS-H
J Orifice
1.287 sq. in.
(830 sq. mm)
Effective Area
Valve
Style
Low Set Pressure Limits:
JOS = 5 psig (0.34 barg)
JBS = 9 psig (0.62 barg)
JLT-JOS = 15 psig (1.03 barg)
JLT-JBS = 25 psig (1.72 barg)
Sizes and Pressure/Temperature Limits
(See also Set Pressure Chart Opposite)
ValveSize
Inlet
x
Orifice
x
Outlet
Inlet
Outlet
150
300
300
600
150
150
150
150
Standard
Connections
ANSIFlanges
Raised Face
Inlet
-450F
to
-76F
-75F -20F
*
to
to
+450F +800F +1000F
-21F +100F
JOSJBSJLT*JOS-H-
15
25
35
45
2J3
2J3
21/2J4
21/2J4
JOSJBSJLT-
55
65
3J4
3J4
285)
285)
740)
1480)
JOSJBSJLTJOS-H-
16
26
36
46
2J3
2J3
21/2J4
21/2J4
JOSJBSJLT-
56
66
3J4
3J4
900 150
1500 300
1845 1235
2700 2060
JOSJBSJLTJOS-H-
37
47
21/2J4
21/2J4
300 150
600 150
510
815
JOSJBSJLT-
57
67
21/2J4
3J4
900 150
1500 300
JOSJBSJLT-
14
24
34
44
2J3
2J3
21/2J4
21/2J4
150
300
300
600
150
150
150
150
JOSJBSJLT-
12
22
32
42
2J3
2J3
21/2J4
21/2J4
150
300
300
600
150
150
150
150
900 150
1500 300
150
300
300
600
Back Press.
Limit@100F
psig
Maximum Set Pressure - psig
150
150
150
150
185
285
615
1235
)
2220) 1845
2700) 2700
)
185
285
615
1235
80
285
410
825
JOS
†
JBS
†
285
285
285
285
230
230
230
230
Inlet
-268C -59C
to
to
-60C -30C
-29C
*
to +232C +427C +538C
+38C
19.6
19.6
51.0
102
285 230
600 230
285
285
285
285
Back Press.
Limit @38C
barg
Maximum Set Pressure - barg
153
186
12.7
19.6
42.4
85.1
127
186
230
230
230
230
12.7
19.6
42.4
85.1
285 230
600 230
127
186
JOS
†
JBS
†
19.6
19.6
19.6
19.6
15.8
15.8
15.8
15.8
19.6 15.8
41.3 15.8
5.51
19.6
28.2
56.8
19.6
19.6
19.6
19.6
85.1
142
15.8
15.8
15.8
15.8
19.6 15.8
41.3 15.8
225
445
285 230
285 230
35.1
56.1
15.5
30.6
)
19.6 15.8
19.6 15.8
1225 670
2040 1115
285 230
600 230
84.4
140
46.1
76.8
19.6 15.8
41.3 15.8
275)
275)
720)
1440)
275
275
500
625
275
275
275
275
230
230
230
230
275
275
275
275
230
230
230
230
18.9
18.9
49.6
99.2
)
18.9
18.9)
34.4
43.0
18.9
18.9
18.9
18.9
15.8
15.8
15.8
15.8
18.9
18.9
18.9
18.9
15.8
15.8
15.8
15.8
*Upper temperature limit of JOS-H-15, 25, 35 and 45 valves is +650F (+343C).
†Outlet pressure for temperatures above +100F (+38C) should not exceed the ANSI flange rating.
Valves set below 15 psig (1.03 barg) cannot be stamped with the ASME Code Symbol. Only metal seated valves may be set below 15 psig.
Dimensions and Weights
Valve
Style
12,14,15,16
22,24,25,26
32,34,35,36,37,47
JOSJBSJLTJOS-H-
42,44,45,46
57
55,56,65,66,67
24
J Orifice
Valve Dimensions - in. (mm)
Approx.
Center to Face
Use To
Approximate Height
Weight
Inlet
Outlet Find Bolt
lbs(kg)
Length
Valve (Cap) Type
Type
E
F
X
J&L
C
D
J
5-3/8
4-7/8
1-11/16 23-3/4
23-1/4
23-3/4
66
(137)
(124)
(43)
(603)
(591)
(603)
(30)
5-3/8
5-5/8
2-1/16
26-3/4
26
26-3/4
89
(137)
(143)
(52)
(679)
(660)
(679)
(40)
6-1/8
6-3/4
2-1/8
29-1/2
28-3/4
29-1/2
115
(156)
(171)
(54)
(749)
(730)
(749)
(52)
6-1/8
6-3/4
2-7/16
29-1/2
28-3/4
29-1/2
140
(156)
(171)
(62)
(749)
(730)
(749)
(64)
7-1/4
7-1/8
2-11/16 32-1/2
31-3/4
32-1/2
155
(184)
(181)
(68)
(826)
(806)
(826)
(70)
Please refer to Warranty and Warnings on page 63.
TYPE J (SCREWED CAP)
TYPE C (REGULAR LIFTING LEVER)
(also JOS-H)
TYPE D (PACKED LIFTING LEVER)
TYPE L (BOLTED CAP)
Pressure-Temperature Limit Chart - To ANSI Cl 600
J Orifice
1.287 sq. in.
(830 sq.mm)
Effective Area
SET PRESSURE - barg
1000
500
900
800
400
700
600
300
500
400
200
300
100
200
100
0
0
•
-100
-100
-200
-300
-200
-400
-450
SET PRESSURE - psig
Pressure-Temperature Limit Chart - ANSI Cl 900, Cl 1500
SET PRESSURE - barg
SET PRESSURE - psig
Please refer to Warranty and Warnings on page 63.
25
Specifications - Crosby Styles JOS, JBS, JLT and JOS-H
K Orifice
1.838 sq. in.
(1186 sq. mm)
Effective Area
ValveSize
Inlet
x
Orifice
x
Outlet
Valve
Style
Low Set Pressure Limits:
JOS = 5 psig (0.34 barg)
JBS = 9 psig (0.62 barg)
JLT-JOS = 15 psig (1.03 barg)
JLT-JBS = 25 psig (1.72 barg)
Sizes and Pressure/Temperature Limits
(See also Set Pressure Chart Opposite)
Standard
Connections
ANSIFlanges
RaisedFace
Inlet
-450F
to
-76F
-75F -20F
to
to
-21F +100F
*
+450F +800F +1000F
Inlet
Outlet
150
300
300
600
150
150
150
150
285) 185
285) 285
740) 615
1480) 1235
900 150
1500 300
2220) 1845
2220) 2220
)
185
285
615
1235
80
285
410
825
JOSJBSJLT*JOS-H-
15
25
35
45
3K4
3K4
3K4
3K4
JOSJBSJLT-
55
65
3K6
3K6
JOSJBSJLTJOS-H-
16
26
36
46
3K4
3K4
3K4
3K4
JOSJBSJLT-
56
66
3K6
3K6
900 150
1500 300
1845 1235
2220 2060
JOSJBSJLTJOS-H-
37
47
3K4
3K4
300 150
600 150
510
815
JOSJBSJLT-
57
67
3K4
3K6
900 150
1500 300
JOSJBSJLT-
14
24
34
44
3K4
3K4
3K4
3K4
150
300
300
600
150
150
150
150
JOSJBSJLT-
12
22
32
42
3K4
3K4
3K4
3K4
150
300
300
600
150
150
150
150
150
300
300
600
Back Press.
Limit@100F
psig
Maximum Set Pressure - psig
150
150
150
150
)
JOS
†
JBS
†
285
285
285
285
150
150
150
200
Maximum Set Pressure - barg
Inlet
-268C -59C
to
to
-60C -30C
19.6
19.6
51.0
102
285 200
600 200
285
285
285
285
-29C
*
to +232C +427C +538C
+38C
153
153
JOS
†
JBS
†
19.6
19.6
19.6
19.6
10.3
10.3
10.3
13.7
19.6
41.3
13.7
13.7
5.51
19.6
28.2
56.8
19.6
19.6
19.6
19.6
10.3
10.3
10.3
13.7
85.1
142
19.6
41.3
13.7
13.7
12.7
19.6
42.4
85.1
127
153
150
150
150
200
12.7
19.6
42.4
85.1
285 200
600 200
127
153
Back Press.
Limit@38C
barg
225
445
285 150
285 200
35.1 15.5
56.1 30.6)
19.6
19.6
10.3
13.7
1225 670
2040 1115
285 200
600 200
84.4 46.1
140 76.8
19.6
41.3
13.7
13.7
18.9
18.9
18.9
18.9
10.3
10.3
10.3
13.7
18.9
18.9
18.9
18.9
10.3
10.3
10.3
13.7
275)
275)
720)
1440)
275
275
525
600
275
275
275
275
150
150
150
200
275
275
275
275
150
150
150
200
18.9
18.9
49.6
99.2
)
18.9
18.9
)
36.1
41.3
*Upper temperature limit of JOS-H-15, 25, 35 and 45 valves is +650F (+343C).
†Outlet pressure for temperatures above +100F (+38C) should not exceed the ANSI flange rating.
Valves set below 15 psig (1.03 barg) cannot be stamped with the ASME Code Symbol. Only metal seated valves may be set below 15 psig.
Dimensions and Weights
Valve
Style
12,14,15,16
22,24,25,26
32,34,35,36,
37,47
42,44,45,46
JOSJBS57
JLTJOS-H55,56
65,66,67
26
Valve Dimensions - in. (mm)
Center to Face
Use To
Approximate Height
Inlet
Outlet Find Bolt
Length
Valve (Cap) Type
E
F
X
J&L
C
D
6-1/8
6-3/8
2-1/8
29-3/4
29
29-3/4
(156)
(162)
(54)
(756)
(737)
(756)
6-1/8
6-3/8
2-1/8
29-3/4
29
29-3/4
(156)
(162)
(54)
(756)
(737)
(756)
7-1/4
7-1/8
2-1/8
33
32-1/2
33-1/4
(184)
(181)
(54)
(838)
(826)
(845)
7-1/4
7-1/8
2-5/16
33
32-1/2
33-1/4
(184)
(181)
(59)
(838)
(826)
(845)
7-13/16
8-1/2
2-11/16
39
38
38-3/4
(198)
(216)
(68)
(991)
(965)
(984)
7-3/4
8-1/2
2-11/16
39
38
38-3/4
(197)
(216)
(68)
(991)
(965)
(984)
Please refer to Warranty and Warnings on page 63.
K Orifice
Approx.
Weight
lbs(kg)
Type
J
116
(52)
117
(53)
160
(73)
175
(79)
185
(84)
195
(88)
TYPE J (SCREWED CAP)
TYPE C (REGULAR LIFTING LEVER)
(also JOS-H)
TYPE D (PACKED LIFTING LEVER)
TYPE L (BOLTED CAP)
Pressure-Temperature Limit Chart - To ANSI Cl 600
SET PRESSURE - barg
1000
500
K Orifice
1.838 sq. in.
(1186 sq.mm)
Effective Area
900
800
400
700
600
300
500
200
400
300
100
200
100
0
0
-100
•
-100
-200
-300
-200
-400
-450
SET PRESSURE - psig
Pressure-Temperature Limit Chart - ANSI Cl 900, Cl 1500
SET PRESSURE - barg
SET PRESSURE - psig
Please refer to Warranty and Warnings on page 63.
27
Specifications - Crosby Styles JOS, JBS, JLT and JOS-H
L Orifice
2.853 sq. in.
(1841 sq. mm)
Effective Area
Valve
Style
Low Set Pressure Limits:
JOS = 6 psig (0.41 barg)
JBS = 8 psig (0.55 barg)
JLT-JOS = 15 psig (1.03 barg)
JLT-JBS = 25 psig (1.72 barg)
Sizes and Pressure/Temperature Limits
(See also Set Pressure Chart Opposite)
ValveSize
Inlet
x
Orifice
x
Outlet
Inlet
Outlet
Standard
Connections
ANSIFlanges
RaisedFace
Back Press.
Limit@100F
psig
Maximum Set Pressure - psig
Inlet
-450F
to
-76F
-75F -20F
*
to
to
+450F +800F +1000F
-21F +100F
JOS
†
JBS
†
100
100
170
170
JOSJBSJLT*JOS-H-
15
25
35
45
3L4
3L4
4L6
4L6
150
300
300
600
150
150
150
150
285) 185
285) 285
740) 615
1000) 1000
)
285
285
285
285
JOSJBSJLT-
55
4L6
900
150
1500) 1500
)
285 170
JOSJBSJLTJOS-H-
16
26
36
46
3L4
3L4
4L6
4L6
150
300
300
600
150
150
150
150
185
285
615
1000
80
285
410
825
JOSJBSJLT-
56
66
4L6
4L6
900
1500
150
150
1500 1235
1500 1500
JOSJBSJLTJOS-H-
37
47
4L6
4L6
300
600
150
150
510
1000
225
445
285 170
285 170
JOSJBSJLT-
57
67
4L6
4L6
900
1500
150
150
1500 670
1500 1115
285 170
285 170
JOSJBSJLT-
14
24
34
44
3L4
3L4
4L6
4L6
150
300
300
600
150
150
150
150
JOSJBSJLT-
12
22
32
42
3L4
3L4
4L6
4L6
150
300
300
600
150
150
150
150
285
285
285
285
Inlet
-268C -59C
to
to
-60C -30C
-29C
*
to +232C +427C +538C
+38C
19.6
19.6
51.0
68.9
103
275
275
535
535
100
100
170
170
275
275
275
275
100
100
170
170
JBS
†
19.6
19.6
19.6
19.6
6.89
6.89
11.7
11.7
19.6
11.7
5.51
19.6
28.2
56.8
19.6
19.6
19.6
19.6
6.89
6.89
11.7
11.7
85.1
103
19.6
19.6
11.7
11.7
35.1
68.9
15.5 19.6
30.6
) 19.6
11.7
11.7
46.1 19.6
76.8 19.6
11.7
11.7
18.9
18.9
18.9
18.9
6.89
6.89
11.7
11.7
18.9
18.9
18.9
18.9
6.89
6.89
11.7
11.7
103
12.7
19.6
42.4
68.9
100
100
170
170
275
275
275
275
JOS
†
12.7
19.6
42.4
68.9
103
103
285 170
285 170
275)
275)
720)
1000)
Back Press.
Limit @38C
barg
Maximum Set Pressure - barg
103
103
18.9
18.9
49.6
68.9
)
18.9
18.9)
36.8
36.8
*Upper temperature limit of JOS-H-15, 25, 35 and 45 valves is +650F (+343C).
†Outlet pressure for temperatures above +100F (+38C) should not exceed the ANSI flange rating.
Valves set below 15 psig (1.03 barg) cannot be stamped with the ASME Code Symbol. Only metal seated valves may be set below 15 psig.
Dimensions and Weights
Valve
Style
12,14,15,16,
22,24,25,26
32,34,35,36,37
JOSJBSJLT- 42,44,45,46,47
JOS-H55,56,57,66,67
28
Valve Dimensions - in. (mm)
Center to Face
Use To
Approximate Height
Inlet
Outlet Find Bolt
Length
Valve (Cap) Type
E
F
X
J&L
C
D
6-1/8
6-1/2
2
34
33-1/4 34
(156)
(165)
(51)
(864)
(845)
(864)
7-1/16
7-1/8
2-1/8
34
34-1/4 34-1/4
(179)
(181)
(54)
(864)
(870)
(870)
7-1/16
8
2-3/8
35-1/4 34-3/4 35-1/4
(179)
(203)
(60)
(895)
(883)
(895)
7-3/4
8-3/4
2-15/16
39-3/4 38-3/4 39-1/2
(197)
(222)
(75)
(1010) (984)
(1003)
Please refer to Warranty and Warnings on page 63.
L Orifice
Approx.
Weight
lbs(kg)
Type
J
152
(69)
192
(87)
226
(103)
270
(122)
TYPE J (SCREWED CAP)
TYPE C (REGULAR LIFTING LEVER)
(also JOS-H)
TYPE D (PACKED LIFTING LEVER)
TYPE L (BOLTED CAP)
Pressure-Temperature Limit Chart
L Orifice
2.853 sq. in.
(1841 sq.mm)
Effective Area
SET PRESSURE - barg
1000
500
900
800
400
700
600
300
500
400
200
300
100
200
100
0
0
•
-100
-100
-200
-300
-200
-400
-450
SET PRESSURE - psig
Please refer to Warranty and Warnings on page 63.
29
Specifications - Crosby Styles JOS, JBS, JLT and JOS-H
M Orifice
3.60 sq. in.
(2323 sq. mm)
Effective Area
ValveSize
Inlet
x
Orifice
x
Outlet
Valve
Style
Low Set Pressure Limits:
JOS = 8 psig (0.55 barg)
JBS = 10 psig (0.68 barg)
JLT-JOS = 15 psig (1.03 barg)
JLT-JBS = 25 psig (1.72 barg)
Sizes and Pressure/Temperature Limits
(See also Set Pressure Chart Opposite)
Standard
Connections
ANSIFlanges
RaisedFace
Inlet
Outlet
JOSJBSJLT*JOS-H-
15
25
35
45
4M6
4M6
4M6
4M6
150
300
300
600
150
150
150
150
JOSJBSJLTJOS-H-
16
26
36
46
4M6
4M6
4M6
4M6
150
300
300
600
150
150
150
150
JOSJBSJLT-
56
4M6
JOSJBSJLTJOS-H-
37
47
4M6
4M6
JOSJBSJLT-
57
4M6
900 150
JOSJBSJLT-
14
24
34
44
4M6
4M6
4M6
4M6
150
300
300
600
150
150
150
150
JOSJBSJLT-
12
22
32
42
4M6
4M6
4M6
4M6
150
300
300
600
150
150
150
150
Back Press.
Limit@100F
psig
Maximum Set Pressure - psig
Inlet
-450F
to
-76F
-75F -20F
*
to
to +450F +800F +1000F
-21F +100F
285)
285)
740)
1100)
JOS
†
JBS
†
80
80
160
160
Maximum Set Pressure - barg
-268C -59C
to
to
-60C -30C
Inlet
-29C
*
to +232C +427C +538C
+38C
19.6
19.6
51.0
75.8
12.7
19.6
42.4
75.8
Back Press.
Limit@38C
barg
JOS
†
JBS
†
19.6
19.6
19.6
19.6
5.51
5.51
11.0
11.0
185
285
615
1100
)
285
285
285
285
185
285
615
1100
80
285
410
825
285
285
285
285
80
80
160
160
12.7
19.6
42.4
75.8
5.51
19.6
28.2
56.8
19.6
19.6
19.6
19.6
5.51
5.51
11.0
11.0
900 150
1100 1100
285
160
75.8
75.8
19.6
11.0
300 150
600 150
510
1015
225
445
285
285
160
160
35.1
69.9
15.5
30.6
19.6
19.6
11.0
11.0
1100
670
285
160
75.8
46.1
19.6
11.0
275
275
275
275
80
80
160
160
18.9
18.9
18.9
18.9
5.51
5.51
11.0
11.0
275
275
275
275
80
80
160
160
18.9
18.9
18.9
18.9
5.51
5.51
11.0
11.0
)
275)
275)
720)
1100)
275
275
525
600
18.9
18.9
49.6
75.8
)
18.9
18.9
)
36.1
41.3
*Upper temperature limit of JOS-H-15, 25, 35 and 45 valves is +650F (+343C).
†Outlet pressure for temperatures above +100F (+38C) should not exceed the ANSI flange rating.
Valves set below 15 psig (1.03 barg) cannot be stamped with the ASME Code Symbol. Only metal seated valves may be set below 15 psig.
Dimensions and Weights
Valve
Style
12,14,15,16,
22,24,25,26
32,34,35,36,37
JOSJBS42,44,45,46,47
JLTJOS-H56,57
30
M Orifice
Valve Dimensions - in. (mm)
Approx.
Center to Face
Use To
Approximate Height
Weight
Inlet
Outlet Find Bolt
lbs(kg)
Length
Valve (Cap) Type
Type
E
F
X
J&L
C
D
J
7
7-1/4
2-1/8
33-1/2
33
33-3/4
201
(178)
(184)
(54)
(851)
(838)
(857)
(91)
7
7-1/4
2-1/8
36
35-1/2
36
222
(178)
(184)
(54)
(914)
(902)
(914)
(101)
7
8
2-7/16
42
41
41-3/4
265
(178)
(203)
(62)
(1067)
(1041)
(1060)
(120)
7 3/4
8-3/4
2-9/16
42-3/4
41-3/4
42-1/2
290
(197)
(222)
(65)
(1086)
(1060)
(1080)
(132)
Please refer to Warranty and Warnings on page 63.
TYPE J (SCREWED CAP)
TYPE C (REGULAR LIFTING LEVER)
(also JOS-H)
TYPE D (PACKED LIFTING LEVER)
TYPE L (BOLTED CAP)
Pressure-Temperature Limit Chart
M Orifice
3.60 sq. in.
(2323 sq.mm)
Effective Area
SET PRESSURE - barg
1000
500
900
800
400
700
600
300
500
200
400
300
100
200
100
0
0
-100
-100
-200
-300
-200
-400
-450
SET PRESSURE - psig
Please refer to Warranty and Warnings on page 63.
31
Specifications - Crosby Styles JOS, JBS, JLT and JOS-H
N Orifice
4.34 sq. in.
(2800 sq. mm)
Effective Area
ValveSize
Inlet
x
Orifice
x
Outlet
Valve
Style
Sizes and Pressure/Temperature Limits
(See also Set Pressure Chart Opposite)
Inlet
Inlet
Outlet
-450F -75F -20F
to
to
to
-76F -21F +100F
285)
285)
740)
1000)
15
25
35
45
4N6
4N6
4N6
4N6
150
300
300
600
150
150
150
150
JOSJBSJLTJOS-H-
16
26
36
46
4N6
4N6
4N6
4N6
150
300
300
600
150
150
150
150
JOSJBSJLTJOS-H-
37
47
4N6
4N6
300
600
150
150
JOSJBSJLT-
14
24
34
44
4N6
4N6
4N6
4N6
150
300
300
600
150
150
150
150
12
22
32
42
4N6
4N6
4N6
4N6
150
300
300
600
Back Press.
Limit@100F
psig
Maximum Set Pressure - psig
Standard
Connections
ANSIFlanges
RaisedFace
JOSJBSJLT*JOS-H-
JOSJBSJLT-
Low Set Pressure Limits:
JOS = 8 psig (0.55 barg)
JBS = 10 psig (0.68 barg)
JLT-JOS = 15 psig (1.03 barg)
JLT-JBS = 25 psig (1.72 barg)
150
150
150
150
*
+450F +800F +1000F
JOS
†
JBS
†
80
80
160
160
185
285
615
1000
)
285
285
285
285
185
285
615
1000
80
285
410
825
285
285
285
285
80
80
160
160
285
285
160
160
275
275
275
275
80
80
160
160
510
1000
225
445
275)
275)
720)
1000)
275
275
450
500
275
275
275
275
80
80
160
160
Back Press.
Limit@38C
barg
Maximum Set Pressure - barg
Inlet
-268C
to
-60C
-59C
to
-30C
-29C
to
+38C
+232C
19.6
19.6
51.0
68.9
12.7
19.6
42.4
68.9
*
+427C
12.7
19.6
42.4
68.9
5.51
19.6
28.2
56.8
35.1
68.9
18.9
18.9
49.6
68.9
+538C
)
18.9
18.9)
31.0
34.4
15.5
30.6
)
JOS
†
JBS
†
19.6
19.6
19.6
19.6
5.51
5.51
11.0
11.0
19.6
19.6
19.6
19.6
5.51
5.51
11.0
11.0
19.6
19.6
11.0
11.0
18.9
18.9
18.9
18.9
5.51
5.51
11.0
11.0
18.9
18.9
18.9
18.9
5.51
5.51
11.0
11.0
*Upper temperature limit of JOS-H-15, 25, 35 and 45 valves is +650F (+343C).
†Outlet pressure for temperatures above +100F (+38C) should not exceed the ANSI flange rating.
Valves set below 15 psig (1.03 barg) cannot be stamped with the ASME Code Symbol. Only metal seated valves may be set below 15 psig.
Dimensions and Weights
Valve
Style
JOS12,14,15,16,
JBS22,24,25,26
JLT32,34,35,36,37
JOS-H42,44,45,46,47
32
N Orifice
Valve Dimensions - in. (mm)
Center to Face
Use To
Approximate Height
Inlet
Outlet Find Bolt
Length
Valve (Cap) Type
E
F
X
J&L
C
D
7-3/4
8-1/4
2-1/8
43-1/4
42-1/4
43
(197)
(210)
(54)
(1099)
(1073)
(1092)
7-3/4
8-1/4
2-1/8
43-1/4
42-1/4
43
(197)
(210)
(54)
(1099)
(1073)
(1092)
7-3/4
8-3/4
2-3/8
43-1/4
42-1/4
43
(197)
(222)
(60)
(1099)
(1073)
(1092)
Please refer to Warranty and Warnings on page 63.
Approx.
Weight
lbs(kg)
Type
J
260
(118)
280
(127)
297
(135)
TYPE J (SCREWED CAP)
TYPE C (REGULAR LIFTING LEVER)
(also JOS-H)
TYPE D (PACKED LIFTING LEVER)
TYPE L (BOLTED CAP)
Pressure-Temperature Limit Chart
N Orifice
4.34 sq. in.
(2800 sq.mm)
Effective Area
SET PRESSURE - barg
1000
500
900
800
400
700
600
300
500
400
200
300
100
200
100
0
0
-100
-100
-200
-300
-200
-400
-450
SET PRESSURE - psig
Please refer to Warranty and Warnings on page 63.
33
Specifications - Crosby Styles JOS, JBS, JLT and JOS-H
P Orifice
6.38 sq. in.
(4116 sq. mm)
Effective Area
ValveSize
Inlet
x
Orifice
x
Outlet
Valve
Style
Low Set Pressure Limits:
JOS = 7 psig (0.48 barg)
JBS = 8 psig (0.55 barg)
JLT-JOS = 15 psig (1.03 barg)
JLT-JBS = 25 psig (1.72 barg)
Sizes and Pressure/Temperature Limits
(See also Set Pressure Chart Opposite)
Standard
Connections
ANSIFlanges
RaisedFace
Inlet Outlet
Maximum Set Pressure - psig
-450F
to
-76F
Inlet
-75F -20F
*
to
to
+450F +800F +1000F
-21F +100F
Back Press.
Limit@100F
psig
JOS
†
JBS
†
80
80
150
150
JOSJBSJLT*JOS-H-
15
25
35
45
4P6
4P6
4P6
4P6
150
300
300
600
150
150
150
150
285) 185
285) 285
525) 525
1000) 1000
)
285
285
285
285
JOSJBSJLTJOS-H-
16
26
36
46
4P6
4P6
4P6
4P6
150
300
300
600
150
150
150
150
185
285
525
1000
80
285
410
825
285
285
285
285
80
80
150
150
JOSJBSJLTJOS-H-
37
47
4P6
4P6
300
600
150
150
285
285
150
150
JOSJBSJLT-
14
24
34
44
4P6
4P6
4P6
4P6
150
300
300
600
150
150
150
150
275
275
275
275
80
80
150
150
JOSJBSJLT-
12
22
32
42
4P6
4P6
4P6
4P6
150
300
300
600
150
150
150
150
275
275
275
275
80
80
150
150
510
1000
225
445
275)
275)
525)
1000)
175
175
300
480
Maximum Set Pressure - barg
-268C -59C
to
to
-60C -30C
Back Press.
Limit@38C
barg
Inlet
-29C
*
to +232C +427C +538C
+38C
JOS
†
JBS
†
19.6
19.6
36.1
68.9
19.6
19.6
19.6
19.6
5.51
5.51
10.3
10.3
19.6
19.6
19.6
19.6
5.51
5.51
10.3
10.3
12.7
19.6
36.1
68.9
12.7
19.6
36.1
68.9
5.51
19.6
28.1
56.8
35.1
68.9
18.9
18.9
36.1
68.9
)
12.0
)
12.0
20.6
33.0
15.5
)
30.6
19.6 10.3
19.6 10.3
18.9
18.9
18.9
18.9
5.51
5.51
10.3
10.3
18.9
18.9
18.9
18.9
5.51
5.51
10.3
10.3
*Upper temperature limit of JOS-H-15, 25, 35 and 45 valves is +650F (+343C).
†Outlet pressure for temperatures above +100F (+38C) should not exceed the ANSI flange rating.
Valves set below 15 psig (1.03 barg) cannot be stamped with the ASME Code Symbol. Only metal seated valves may be set below 15 psig.
Dimensions and Weights
Valve
Style
JOS12,14,15,16,
JBS22,24,25,26
JLT32,34,35,36,37
JOS-H42,44,45,46,47
34
P Orifice
Valve Dimensions - in. (mm)
Center to Face
Use To
Approximate Height
Inlet
Outlet Find Bolt
Length
Valve (Cap) Type
E
F
X
J&L
C
D
7-1/8
9
2-1/8
42-1/2
41-1/2
42-1/4
(181)
(229)
(54)
(1080)
(1054)
(1073)
8-7/8
10
2-1/8
44-1/4
43-1/4
44
(225)
(254)
(54)
(1124)
(1099)
(1118)
8-7/8
10
2-9/16 46-1/2
45-1/2
46-1/4
(225)
(254)
(65)
(1181)
(1156)
(1175)
Please refer to Warranty and Warnings on page 63.
Approx.
Weight
lbs(kg)
Type
J
270
(122)
286
(130)
401
(182)
TYPE J (SCREWED CAP)
TYPE C (REGULAR LIFTING LEVER)
(also JOS-H)
TYPE D (PACKED LIFTING LEVER)
TYPE L (BOLTED CAP)
Pressure-Temperature Limit Chart
P Orifice
6.38 sq. in.
(4116 sq.mm)
Effective Area
SET PRESSURE - barg
1000
500
900
800
400
700
600
300
500
400
200
300
100
200
100
0
0
-100
-100
-200
-300
-200
-400
-450
SET PRESSURE - psig
Please refer to Warranty and Warnings on page 63.
35
Specifications - Crosby Styles JOS, JBS, JLT and JOS-H
Q Orifice
11.05 sq. in.
(7129 sq. mm)
Effective Area
Valve Size
Inlet
x
Orifice
x
Outlet
Valve
Style
Low Set Pressure Limits:
JOS = 5 psig (0.34 barg)
JBS = 7 psig (0.48 barg)
JLT-JOS = 15 psig (1.03 barg)
JLT-JBS = 25 psig (1.72 barg)
Sizes and Pressure/Temperature Limits
(See also Set Pressure Chart Opposite)
Back Press.
Maximum Set Pressure - psig
Maximum Set Pressure - barg
Standard
Limit @100F
Connections
Inlet
Inlet
psig
ANSI Flanges
Raised Face -450F -75F -20F
-268C
-59C
-29C
*
*
to
to
to +232C +427C +538C
to
to
to
+450F +800F +1000F JOS JBS
Inlet Outlet -76F -21F +100F
-60C -30C +38C
†
†
JOSJBSJLT*JOS-H-
15
25
35
45
6Q8
6Q8
6Q8
6Q8
150
300
300
600
150
150
150
150
JOSJBSJLTJOS-H-
16
26
36
46
6Q8
6Q8
6Q8
6Q8
150
300
300
600
150
150
150
150
JOSJBSJLTJOS-H-
37
47
6Q8
6Q8
300
600
150
150
JOSJBSJLT-
14
24
34
44
6Q8
6Q8
6Q8
6Q8
150
300
300
600
150
150
150
150
JOSJBSJLT-
12
22
32
42
6Q8
6Q8
6Q8
6Q8
150
300
300
600
150
150
150
150
165)
165)
300)
600)
165
165
300
600
)
115 70)
115 70)
115 115)
115 115)
165
165
300
600
80
165
300
600
115 70)
115 70)
115 115)
115 115)
165 165
600 445
115 115
115 115
165)
165)
300)
600)
11.3
11.3
20.6
41.3
115 70
115 70
115 115
115 115
165
165
250
300
JOS
†
JBS
†
7.92
7.92
7.92
7.92
4.82
4.82
7.92
7.92
5.51
11.3
20.6
41.3
7.92
7.92
7.92
7.92
4.82
4.82
7.92
7.92
11.3
41.3
11.3 7.92
30.6 ) 7.92
7.92
7.92
7.92
7.92
7.92
7.92
4.82
4.82
7.92
7.92
7.92
7.92
7.92
7.92
4.82
4.82
7.92
7.92
11.3
11.3
20.6
41.3
11.3
11.3
20.6
41.3
11.3
11.3
20.6
41.3
Back Press.
Limit @38C
barg
)
115 70 11.3
115 70 11.3)
115 115 17.2
115 115 20.6
*Upper temperature limit of JOS-H-15, 25, 35 and 45 valves is +650F (+343C).
†Outlet pressure for temperatures above +100F (+38C) should not exceed the ANSI flange rating.
Valves set below 15 psig (1.03 barg) cannot be stamped with the ASME Code Symbol. Only metal seated valves may be set below 15 psig.
Dimensions and Weights
Valve
Style
JOS12,14,15,16,
JBS22,24,25,26
JLT32,34,35,36,37
JOS-H42,44,45,46,47
36
Q Orifice
Valve Dimensions - in. (mm)
Center to Face
Use To
Approximate Height
Inlet
Outlet Find Bolt
Length
Valve (Cap) Type
E
F
X
J&L
C
D
9-7/16
(240)
9-7/16
(240)
9-7/16
(240)
9-1/2
(241)
9-1/2
(241)
9-1/2
(241)
2-5/16
(59)
2-5/16
(59)
2-15/16
(75)
47-3/4
(1213)
47-3/4
(1213)
51-3/4
(1314)
Please refer to Warranty and Warnings on page 63.
46-3/4
(1187)
46-3/4
(1187)
50-3/4
(1289)
47-1/2
(1207)
47-1/2
(1207)
51-1/2
(1308)
Approx.
Weight
lbs(kg)
Type
J
481
(218)
492
(223)
565
(256)
TYPE J (SCREWED CAP)
TYPE C (REGULAR LIFTING LEVER)
(also JOS-H)
TYPE D (PACKED LIFTING LEVER)
TYPE L (BOLTED CAP)
Pressure-Temperature Limit Chart
Q Orifice
11.05 sq. in.
(7129 sq.mm)
Effective Area
SET PRESSURE - barg
1000
500
900
800
400
700
600
300
500
400
200
300
100
200
100
0
0
-100
-100
-200
-300
-200
-400
-450
SET PRESSURE - psig
Please refer to Warranty and Warnings on page 63.
37
Specifications - Crosby Styles JOS, JBS, JLT and JOS-H
R Orifice
16.0 sq. in.
(10323 sq. mm)
Effective Area
Low Set Pressure Limits:
JOS = 8 psig (0.55 barg)
JBS = 8 psig (0.55 barg)
JLT-JOS = 15 psig (1.03 barg)
JLT-JBS = 25 psig (1.72 barg)
Sizes and Pressure/Temperature Limits
(See also Set Pressure Chart Opposite)
Back Press.
Valve Size
Maximum Set Pressure - psig
Maximum Set Pressure - barg
Standard
Limit @100F
Connections
Inlet
Inlet
Inlet
psig
ANSI Flanges
x
Raised Face
-268C
-59C
-29C
Orifice
-450F -75F -20F
*
*
to
to
to +232C +427C +538C
x
to
to
to +450F +800F +1000F JOS JBS
Inlet Outlet -76F -21F +100F
-60C -30C +38C
Outlet
†
†
Valve
Style
JOSJBSJLT*JOS-H-
15
25
35
45
6R8
6R8
6R10
6R10
150
300
300
600
150
150
150
150
JOSJBSJLTJOS-H-
16
26
36
46
6R8
6R8
6R10
6R10
150
300
300
600
150
150
150
150
JOSJBSJLTJOS-H-
37
47
6R8
6R10
300
600
150
150
JOSJBSJLT-
14
24
34
44
6R8
6R8
6R10
6R10
150
300
300
600
150
150
150
150
JOSJBSJLT-
12
22
32
42
6R8
6R8
6R10
6R10
150
300
300
600
150
150
150
150
100)
100)
230)
300)
100
100
230
300
100
100
230
300
)
60
60
100
100
60
60
100
100
80
100
230
300
60
60
100
100
60
60
100
100
60
100
60
100
60
60
100
100
60
60
100
100
60
60
100
100
60
60
100
100
100
300
100
300
100)
100)
230)
300)
55
55
150
200
6.89
6.89
15.8
20.6
6.89
6.89
15.8
20.6
6.89
6.89
15.8
20.6
6.89
6.89
15.8
20.6
)
3.79
3.79)
10.3
13.7
Back Press.
Limit @38C
barg
JOS
†
JBS
†
4.13
4.13
6.89
6.89
4.13
4.13
6.89
6.89
5.51
6.89
15.8
20.6
4.13
4.13
6.89
6.89
4.13
4.13
6.89
6.89
6.89
20.6
6.89 4.13
20.6) 6.89
4.13
6.89
4.13
4.13
6.89
6.89
4.13
4.13
6.89
6.89
4.13
4.13
6.89
6.89
4.13
4.13
6.89
6.89
*Upper temperature limit of JOS-H-15, 25, 35 and 45 valves is +650F (+343C).
†Outlet pressure for temperatures above +100F (+38C) should not exceed the ANSI flange rating.
Valves set below 15 psig (1.03 barg) cannot be stamped with the ASME Code Symbol. Only metal seated valves may be set below 15 psig.
Dimensions and Weights
Valve
Style
JOS12,14,15,16,
JBS22,24,25,26
JLT32,34,35,36,37
JOS-H42,44,45,46,47
38
R Orifice
Valve Dimensions - in. (mm)
Center to Face
Use To
Approximate Height
Inlet
Outlet Find Bolt
Length
Valve (Cap) Type
E
F
X
J&L
C
D
9-7/16
(240)
9-7/16
(240)
9-7/16
(240)
9-1/2
(241)
10-1/2
(267)
10-1/2
(267)
2-5/16
(59)
2-5/16
(59)
2-3/4
(70)
53-1/4
(1353)
53-1/4
(1353)
53-1/4
(1353)
Please refer to Warranty and Warnings on page 63.
52-1/2
(1334)
52-1/2
(1334)
52-1/2
(1334)
53-1/4
(1353)
53-1/4
(1353)
53-1/4
(1353)
Approx.
Weight
lbs(kg)
Type
J
564
(256)
602
(273)
631
(286)
TYPE J (SCREWED CAP)
TYPE C (REGULAR LIFTING LEVER)
(also JOS-H)
TYPE D (PACKED LIFTING LEVER)
TYPE L (BOLTED CAP)
Pressure-Temperature Limit Chart
R Orifice
16.0 sq. in.
(10323 sq.mm)
Effective Area
SET PRESSURE - barg
1000
500
900
800
400
700
600
300
500
400
200
300
100
200
100
0
0
-100
-100
-200
-300
-200
-400
-450
SET PRESSURE - psig
Please refer to Warranty and Warnings on page 63.
39
Specifications - Crosby Styles JOS, JBS, JLT and JOS-H
T Orifice
26.0 sq. in.
(16774 sq. mm)
Effective Area
Low Set Pressure Limits:
JOS = 8 psig (0.55 barg)
JBS = 8 psig (0.55 barg)
JLT-JOS = 15 psig (1.03 barg)
JLT-JBS = 25 psig (1.72 barg)
Sizes and Pressure/Temperature Limits
(See also Set Pressure Chart Opposite)
Back Press.
Valve Size
Maximum Set Pressure - psig
Maximum Set Pressure - barg
Standard
Limit @100F
Connections
Inlet
Inlet
Inlet
psig
ANSI Flanges
x
Raised Face
-450F -75F -20F
-268C
-59C
-29C
Orifice
*
*
to
to
to +450F +800F +1000F JOS JBS
to
to
to +232C +427C +538C
x
Inlet Outlet -76F -21F +100F
†
†
-60C -30C +38C
Outlet
Valve
Style
JOSJBSJLT*JOS-H-
15
25
35
45
8T10
8T10
8T10
8T10
150
300
300
300
150
150
150
150
JOSJBSJLTJOS-H-
16
26
36
46
8T10
8T10
8T10
8T10
150
300
300
300
150
150
150
150
JOSJBSJLTJOS-H-
37
8T10
300
150
JOSJBSJLT-
14
24
34
8T10
8T10
8T10
150
300
300
150
150
150
JOSJBSJLT-
12
22
32
8T10
8T10
8T10
150
300
300
150
150
150
65)
65)
120)
300)
65
65
120
300
)
30 30
30 30
60 60
100 100
65
65
120
300
65
65
120
300
30 30
30 30
60 60
100 100
300 225
65)
65)
120)
50
50
65
60
60
30
30
60
30
30
60
30
30
60
30 3.44
30 3.44
)
60 4.48
4.48
4.48
8.27
20.6
4.48
4.48
8.27
20.6
4.48
4.48
8.27
20.6
4.48
4.48
8.27
20.6
20.6
4.48
4.48
8.27
15.5
Back Press.
Limit @38C
barg
JOS
†
JBS
†
2.06
2.06
4.13
6.89
2.06
2.06
4.13
6.89
2.06
2.06
4.13
6.89
2.06
2.06
4.13
6.89
4.13
4.13
2.06
2.06
4.13
2.06
2.06
4.13
2.06
2.06
4.13
2.06
2.06
4.13
*Upper temperature limit of JOS-H-15, 25, 35 and 45 valves is +650F (+343C).
†Outlet pressure for temperatures above +100F (+38C) should not exceed the ANSI flange rating.
Valves set below 15 psig (1.03 barg) cannot be stamped with the ASME Code Symbol. Only metal seated valves may be set below 15 psig.
Dimensions and Weights
Valve
Style
JOS12,14,15,16,
JBS22,24,25,26
JLT32,34,35,36,37
JOS-H45,46
40
T Orifice
Valve Dimensions - in. (mm)
Approx.
Center to Face
Use To
Approximate Height
Weight
Inlet
Outlet Find Bolt
lbs(kg)
Length
Valve (Cap) Type
Type
E
F
X
J&L
C
D
J
10-7/8
11
2-9/16
59-1/2
58-1/2
59-1/4
882
(276)
(279)
(65)
(1511)
(1486)
(1505)
(400)
10-7/8
11
2-9/16
59-1/2
58-1/2
59-1/4
902
(276)
(279)
(65)
(1511)
(1486)
(1505)
(409)
10-7/8
11
2-9/16
59-1/2
58-1/2
59-1/4
930
(276)
(279)
(65)
(1511)
(1486)
(1505)
(422)
Please refer to Warranty and Warnings on page 63.
TYPE J (SCREWED CAP)
TYPE C (REGULAR LIFTING LEVER)
(also JOS-H)
TYPE D (PACKED LIFTING LEVER)
TYPE L (BOLTED CAP)
Pressure-Temperature Limit Chart
T Orifice
26.0 sq. in.
(16774 sq.mm)
Effective Area
SET PRESSURE - barg
1000
500
900
800
400
700
600
300
500
400
200
300
100
200
100
0
0
-100
-100
-200
-300
-200
-400
-450
SET PRESSURE - psig
Please refer to Warranty and Warnings on page 63.
41
Specifications - Crosby Styles JOS, JBS and JOS-H
T2 Orifice
27.872 sq. in.
(17981 sq. mm)
Effective Area
Low Set Pressure Limits:
JOS = 8 psig (0.55 barg)
JBS = 8 psig (0.55 barg)
Sizes and Pressure/Temperature Limits
(See also Set Pressure Chart Opposite)
Back Press.
Valve Size
Maximum Set Pressure - psig
Maximum Set Pressure - barg
Standard
Limit @100F
Connections
Inlet
Inlet
Inlet
psig
ANSI Flanges
x
Raised Face
-450F -75F -20F
-268C
-59C
-29C
Orifice
*
*
to
to
to +450F +800F +1000F JOS JBS
to
to
to +232C +427C +538C
x
Inlet Outlet -76F -21F +100F
†
†
-60C -30C +38C
Outlet
Valve
Style
JOS15
JBS25
*JOS-H- 35
45
8T210
8T210
8T210
8T210
150
300
300
300
150
150
150
150
JOSJBSJOS-H-
16
26
36
46
8T210
8T210
8T210
8T210
150
300
300
300
150
150
150
150
JOSJBSJOS-H-
37
8T210
300
150
JOSJBS-
14
24
34
8T210
8T210
8T210
150
300
300
150
150
150
JOSJBS-
12
22
32
8T210
8T210
8T210
150
300
300
150
150
150
65)
65)
120)
300)
65
65
120
300
)
30 30
30 30
60 60
100 100
65
65
120
300
65
65
120
300
30 30
30 30
60 60
100 100
300 225
65)
65)
120)
50
50
65
60
60
30
30
60
30
30
60
30
30
60
30
30
60
4.48
4.48
8.27
20.6
4.48
4.48
8.27
20.6
4.48
4.48
8.27
20.6
4.48
4.48
8.27
20.6
20.6
4.48
4.48
8.27
3.44
3.44
)
4.48
15.5
Back Press.
Limit @38C
barg
JOS
†
JBS
†
2.06
2.06
4.13
6.89
2.06
2.06
4.13
6.89
2.06
2.06
4.13
6.89
2.06
2.06
4.13
6.89
4.13
4.13
2.06
2.06
4.13
2.06
2.06
4.13
2.06
2.06
4.13
2.06
2.06
4.13
*Upper temperature limit of JOS-H-15, 25, 35 and 45 valves is +650F (+343C).
†Outlet pressure for temperatures above +100F (+38C) should not exceed the ANSI flange rating.
Valves set below 15 psig (1.03 barg) cannot be stamped with the ASME Code Symbol. Only metal seated valves may be set below 15 psig.
Dimensions and Weights
Valve
Style
JOS12,14,15,16,
JBS22,24,25,26
JOS-H- 32,34,35,36,37
45,46
42
T2 Orifice
Valve Dimensions - in. (mm)
Approx.
Center to Face
Use To
Approximate Height
Weight
Inlet
Outlet Find Bolt
lbs(kg)
Length
Valve (Cap) Type
Type
E
F
X
J&L
C
D
J
10-7/8
11
2-9/16
59-1/2
58-1/2
59-1/4
882
(276)
(279)
(65)
(1511)
(1486)
(1505)
(400)
10-7/8
11
2-9/16
59-1/2
58-1/2
59-1/4
902
(276)
(279)
(65)
(1511)
(1486)
(1505)
(409)
10-7/8
11
2-9/16
59-1/2
58-1/2
59-1/4
930
(276)
(279)
(65)
(1511)
(1486)
(1505)
(422)
Please refer to Warranty and Warnings on page 63.
TYPE J (SCREWED CAP)
TYPE C (REGULAR LIFTING LEVER)
(also JOS-H)
TYPE D (PACKED LIFTING LEVER)
TYPE L (BOLTED CAP)
Pressure-Temperature Limit Chart
T2 Orifice
27.872 sq. in.
(17981 sq.mm)
Effective Area
SET PRESSURE - barg
1000
500
900
800
400
700
600
300
500
400
200
300
100
200
100
0
0
-100
-100
-200
-300
-200
-400
-450
SET PRESSURE - psig
Please refer to Warranty and Warnings on page 63.
43
Air Capacities
Styles JOS and JBS
Capacity in standard cubic
feet per minute of air at 60F
and 10% overpressure.† Valve
discharging to atmospheric
pressure.
Set Pressures USCS UNITS
5-780 psig
(United States Customary System)
Shaded values are JOS only
Note: For air capacities, USCS Units are exact equivalents of Imperial Units.
Set
Pressure
(psig)
*1 psi incr.
*5 psi incr.
D
0.110
2.1
10.8
5
6
7
8
9
E
0.196
3.8
19.2
F
0.307
6.0
30.2
G
0.503
9.8
49.4
H
0.785
15.4
77.2
ORIFICE LETTER DESIGNATION AND EFFECTIVE AREA, sq. in.
J
K
L
M
N
P
1.287
1.838
2.853
3.60
4.34
6.38
25.3
36.1
56.1
70.8
85.3
125
126
180
280
354
426
627
89.9
93.6
121
128
135
140
146
199
211
221
230
240
311
329
345
360
374
510
540
566
590
614
728
771
808
843
877
1197
1255
1308
1362
1651
1719
1991
2072
Q
11.05
217
1087
R
T
T2
16.0
26.0
27.872
314
511
548
1574
2557
2742
2807
2927
3047
4379
4637
4862
5069
5277
7340
7641
11928
12417
12787
13312
10
15
20
30
40
54.5
64.3
74.1
93.8
115
97.1
114
132
167
205
152
179
207
261
322
249
294
339
429
528
388
459
529
669
824
637
752
867
1098
1351
910
1075
1239
1568
1929
1413
1668
1924
2434
2995
1783
2105
2427
3071
3780
2150
2538
2926
3703
4557
3161
3731
4302
5443
6699
5475
6463
7451
9428
11602
7928
9359
10790
13652
16800
12883
15208
17533
22184
27300
13810
16303
18796
23782
29266
50
60
70
80
90
137
158
180
202
223
244
282
321
360
398
382
443
503
563
624
627
726
825
924
1023
978
1133
1287
1442
1596
1604
1857
2111
2364
2617
2291
2653
3014
3376
3738
3557
4118
4679
5241
5802
4488
5196
5905
6613
7321
5411
6265
7119
7973
8827
7954
9209
10465
11720
12976
13777
15951
18125
20300
22474
19948
23097
26245
29393
32542
32416
37532
42648
47764
52880
34750
40235
45719
51203
56688
100
120
140
160
180
245
288
331
375
418
437
514
591
668
745
684
805
926
1047
1168
1122
1319
1517
1715
1913
1751
2059
2368
2677
2986
2870
3377
3883
4390
4896
4099
4823
5546
6269
6993
6364
7486
8609
9732
10855
8030
9447
10863
12280
13697
9680
11388
13096
14804
16512
14231
16742
19253
21763
24274
24648
28997
33345
37694
42043
35690
41986
48283
54580
60876
57996 62172
68228 73141
78460 84109
88692 95078
98924 106047
200
220
240
260
280
461
505
548
591
634
822
900
977
1054
1131
1288
1409
1530
1651
1772
2111
2309
2507
2705
2903
3295
3604
3913
4222
4531
5403
5909
6416
6922
7429
7716
8439
9163
9886
10609
11977
13100
14223
15346
16468
15114
16530
17947
19364
20780
18220
19928
21636
23344
25052
26785
29296
31806
34317
36828
46391
50740
55088
59437
63785
67173
73469
79766
86063
92359
300
320
340
360
380
678
721
764
808
851
1208
1285
1362
1439
1517
1892
2013
2134
2255
2376
3101
3299
3497
3695
3893
4840
5149
5458
5767
6076
7935
8442
8948
9455
9961
11333
12056
12779
13503
14226
17591
18714
19837
20959
22082
22197
23614
25031
26447
27864
26760
28468
30176
31884
33592
39339
41850
44360
46871
49382
68134
72483
76831
81180
85528
98656 160316 171859
400
420
440
460
480
894
937
981
1024
1067
1594
1671
1748
1825
1902
2497
2617
2738
2859
2980
4091
4289
4487
4685
4883
6384
6693
7002
7311
7620
10468
10974
11481
11987
12494
14949
15673
16396
17119
17843
23205
24328
25451
26573
27696
29281
30698
32114
33531
34948
35300
37008
38716
40424
42132
51893
54403
56914
59425
61936
89877
94226
98574
102923
107271
500
520
540
560
580
1111
1154
1197
1241
1284
1979
2057
2134
2211
2288
3101
3221
3342
3463
3584
5081
5278
5476
5674
5872
7929
8238
8547
8856
9165
13000
13506
14013
14519
15026
18566
19289
20013
20736
21459
28819
29942
31064
32187
33310
36365
37781
39198
40615
42032
43840
45548
47256
48963
50671
64446
66957
69468
71979
74490
111620
115969
120317
124666
129014
600
620
640
660
680
1327
1370
1414
1457
1500
2365
2442
2519
2596
2674
3705
3826
3946
4067
4188
6070
6268
6466
6664
6862
9474
9783
10092
10401
10709
15532
16039
16545
17052
17558
22182
22906
23629
24352
25076
34433
35555
36678
37801
38924
43448
44865
46282
47698
49115
52379
54087
55795
57503
59211
77000
79511
82022
84533
87043
133363
700
720
740
760
780
1544
1587
1630
1673
1717
2751
2828
2905
2982
3059
4309
4430
4550
4671
4792
7060
7258
7456
7654
7852
11018
11327
11636
11945
12254
18065
18571
19078
19584
20091
25799
26522
27246
27969
28692
40046
41169
42292
43415
44538
50532
51949
53365
54782
56199
60919
62627
64335
66043
67751
89554
92065
94576
97087
99597
*Not valid below 30 psig set pressure.
†Capacities below 30 psig set pressure are calculated at 3 psi overpressure.
44
Capacities certified by the National Board of
Boiler and Pressure Vessel Inspectors and
in accordance with the ASME Boiler and
Pressure Vessel Code, Section VIII.
Please refer to Warranty and Warnings on page 63.
109156
119388
129620
139852
150084
117015
127984
138953
149922
160890
Air Capacities
Styles JOS and JBS
Set Pressures
800-6000 psig
Capacity in standard cubic
feet per minute of air at 60F
and 10% overpressure. Valve
discharging to atmospheric
pressure.
USCS UNITS
(United States Customary System)
Note: For air capacities, USCS Units are exact equivalents of Imperial Units.
Capacities certified by the National Board of
Boiler and Pressure Vessel Inspectors and
in accordance with the ASME Boiler and
Pressure Vessel Code, Section VIII.
Set
Pressure
(psig)
1 psi incr.
5 psi incr.
D
0.110
2.1
10.8
800
820
840
860
880
1760
1803
1847
1890
1933
3136
3214
3291
3368
3445
4913
5034
5155
5275
5396
8050
8248
8446
8644
8842
12563
12872
13181
13490
13799
20597
21104
21610
22117
22623
29416
30139
30862
31586
32309
45660
46783
47906
49029
50151
57616
59032
60449
61866
63283
69459
71167
72875
74583
76291
102108
104619
107130
109640
112151
900
920
940
960
980
1976
2020
2063
2106
2150
3522
3599
3676
3753
3831
5517
5638
5759
5879
6000
9039
9237
9435
9633
9831
14108
14417
14726
15034
15343
23130
23636
24143
24649
25156
33032
33756
34479
35202
35926
51274
52397
53520
54642
55765
64699
66116
67533
68950
70366
77999
79707
81415
83123
84831
114662
117173
119683
122194
124705
1000
1100
1200
1300
1400
2193
2409
2626
2842
3059
3908
4293
4679
5065
5450
6121
6725
7329
7933
8537
10029
11019
12009
12998
13988
15652
17197
18742
20286
21831
25662
28195
30727
33259
35792
36649
40266
43882
47499
51115
56888
62502
68116
73729
79343
71783
78867
86538 127216
1480
1500
1600
1700
1800
3232
3275
3492
3708
3924
5759
9021
5836
9141
6222
9746
6607 10350
6993 10954
14780
14978
15968
16957
17947
23067
23375
24920
26465
28009
37818
38324
40857
43389
45921
54009
54732
58349
61965
65582
83834
1900
2000
2100
2200
2300
4141
4357
4574
4790
5007
7379
7764
8150
8536
8921
11558
12162
12766
13370
13974
18937
19927
20916
21906
22896
29554
31099
32643
34188
35733
48454
50986
53519
56051
58584
69198
72815
76432
80048
2400
2500
2600
2700
2800
5223
9307 14578
5440
9693 15182
5656 10078 15786
5872 10464 16390
6089 10850 16994
23886
24875
25865
26855
27845
37277
38822
40366
41911
61116
63648
66181
68713
2900
3000
3100
3200
3300
6305
6522
6738
6955
7171
11235
11621
12007
12392
12778
17599
18203
18807
19411
20015
28834
29824
30814
31804
32793
3400
3500
3600
3700
3800
7388
7604
7820
8037
8253
13164
13549
13935
14321
14706
20619
21223
21827
22431
23035
33783
34773
35763
36752
3900
4000
4200
4400
4600
8470
8686
9119
9552
9985
15092
15478
16249
17020
17792
23639
24243
25452
26660
27868
4800
5000
5200
5400
5600
5800
6000
10418
10851
11284
11717
12149
12582
13015
E
0.196
3.8
19.2
F
0.307
6.0
30.2
G
0.503
9.8
49.4
H
0.785
15.4
77.2
ORIFICE LETTER DESIGNATION AND EFFECTIVE AREA, sq. in.
J
K
L
M
N
P
1.287
1.838
2.853
3.60
4.34
6.38
25.3
36.1
56.1
70.8
85.3
125
126
180
280
354
426
627
Q
11.05
217
1087
R
T
T2
16.0
26.0
27.872
314
511
548
1574
2557
2742
18563 29076
19334 30284
20106
20877
21648
22420
23191
Please refer to Warranty and Warnings on page 63.
45
Water Capacities
Styles JLT-JOS and JLT-JBS
Differential Pressures
5-1040 psi†
Capacity in U.S. gallons per
minute of water at 70F and 10%
overpressure.
P* USCS UNITS
Capacities certified by the National Board of
Boiler and Pressure Vessel Inspectors and
in accordance with the ASME Boiler and
Pressure Vessel Code, Section VIII.
(United States Customary System)
Note: USCS Units for water and liquids are U.S. gallons per minute
(1 U.S. gallon equals 0.8327 Imperial gallon).
Diff.*
Pressure
P
(psi)
D
0.110
E
0.196
F
0.307
G
0.503
H
0.785
5
10
15
20
40
60
80
100
120
140
160
180
200
220
240
260
280
300
320
340
360
380
400
420
440
460
480
500
520
540
560
580
600
620
640
660
680
700
720
740
760
780
800
820
840
860
880
900
920
940
960
980
1000
1020
1040
6.9
9.7
11.9
13.8
19.5
23.9
27.6
30.9
33.9
36.6
39.1
41.5
43.7
45.9
47.9
49.9
51.7
53.6
55.3
57.0
58.7
60.3
61.9
63.4
64.9
66.3
67.8
69.2
70.5
71.9
73.2
74.5
75.8
77.0
78.3
79.5
80.7
81.8
83.0
84.2
85.3
86.4
87.5
88.6
89.7
90.7
91.8
92.8
93.8
94.9
95.9
96.9
97.8
98.8
99.8
12.3
17.4
21.3
24.6
34.8
42.7
49.3
55.1
60.4
65.2
69.7
73.9
78.0
81.8
85.4
88.9
92.2
95.5
98.6
101
104
107
110
113
115
118
120
123
125
128
130
132
135
137
139
141
143
145
147
150
152
154
156
157
159
161
163
165
167
169
170
172
174
176
177
19.3
27.3
33.4
38.6
54.6
66.9
77.2
86.3
94.6
102
109
115
122
128
133
139
144
149
154
159
163
168
172
177
181
185
189
193
196
200
204
208
211
215
218
221
225
228
231
235
238
241
244
247
250
253
256
259
262
264
267
270
273
275
278
31.6
44.7
54.8
63.3
89.5
109
126
141
155
167
179
189
200
209
219
228
236
245
253
260
268
275
283
290
296
303
310
316
322
328
334
340
346
352
358
363
369
374
379
385
390
395
400
405
410
415
419
424
429
433
438
443
447
452
456
49.3
69.8
85.5
98.7
139
171
197
220
241
261
279
296
312
327
342
356
369
382
395
407
419
430
441
452
463
473
483
493
503
513
522
531
541
550
558
567
576
584
592
600
608
616
624
632
640
647
655
662
670
677
684
691
698
705
712
ORIFICE LETTER DESIGNATION AND EFFECTIVE AREA, sq. in.
J
K
L
M
N
P
1.287
1.838
2.853
3.60
4.34
6.38
80.9
114
140
161
229
280
323
362
396
428
458
485
512
537
561
583
606
627
647
667
687
705
724
742
759
776
793
809
825
841
857
872
887
901
916
930
944
958
971
985
998
1011
1024
1037
1049
1062
1074
1086
1098
1110
1122
1133
1145
1156
1167
115
163
200
231
327
400
462
517
566
611
654
693
731
767
801
833
865
895
925
953
981
1008
1034
1059
1084
1109
1133
1156
1179
1201
1223
1245
1266
1287
1308
1328
1348
1368
1387
1406
1425
1444
1462
1481
1499
1516
1534
1551
1568
1585
1602
1619
1635
1651
1667
179
253
310
359
507
621
718
802
879
949
1015
1077
1135
1190
1243
1294
1343
1390
1436
1480
1523
1565
1605
1645
1684
1721
1758
1795
1830
1865
1899
1933
1966
1999
2031
2062
2093
2124
2154
2183
2213
2242
2270
2298
2326
2354
2381
2408
2435
2461
2487
2513
2538
2564
2589
226
320
392
453
640
784
906
1013
1109
1198
1281
1359
1432
1502
1569
1633
1695
1754
1812
1867
1922
1974
2026
2076
2124
2172
2219
2265
2310
2354
2397
2439
2481
2522
2562
2602
2641
2680
2718
2755
2792
2829
2865
2900
2936
2970
3005
3039
3072
3105
3138
3171
3203
3235
3266
273
386
472
546
772
945
1092
1221
1337
1445
1544
1638
1727
1811
1891
1969
2043
2115
2184
2251
2317
2380
2442
2502
2561
2619
2675
2730
2784
2837
2890
2941
2991
3040
3089
3137
3184
3231
3277
3322
3366
3410
3454
3497
3539
3581
3622
3663
3704
3744
3783
3823
3862
3900
3938
401
567
695
802
1135
1390
1605
1795
1966
2124
2270
2408
2538
2662
2781
2894
3004
3109
3211
3310
3406
3499
3590
3679
3765
3850
3933
4014
4093
4171
4248
4323
4397
4470
4541
4612
4681
4750
4817
4883
4949
5014
5077
5141
5203
5264
5325
5385
5445
5504
5562
5620
5677
5733
5789
Q
11.05
R
16.0
T
26.0
695
983
1204
1390
1966
2408
2781
3109
3406
3679
3933
4171
4397
4612
4817
5013
5203
5385
5562
5733
5899
6061
6218
6372
6522
6669
6812
6952
7090
7225
7358
7488
7616
7742
7866
7988
1006
1423
1743
2013
2847
3487
4027
4502
4932
5327
5695
6040
6367
6678
6975
7259
7533
7798
8054
1635
2313
2833
3271
4627
5667
6543
7316
8014
8656
9254
9815
10346
10851
11334
11797
12242
12672
13087
P) equals) inlet pressure (set pressure plus overpressure) at flowing conditions minus back pressure.
†See pages 14 to 43 for Minimum and Maximum Set Pressure Limits.
*Differential Pressure (
46
Please refer to Warranty and Warnings on page 63.
Water Capacities
Styles JLT-JOS and JLT-JBS
Differential Pressures
1060-6600 psi†
Capacity in U.S. gallons per
minute of water at 70F and 10%
overpressure.
P* USCS UNITS
Capacities certified by the National Board of
Boiler and Pressure Vessel Inspectors and
in accordance with the ASME Boiler and
Pressure Vessel Code, Section VIII.
(United States Customary System)
Note: USCS Units for water and liquids are U.S. gallons per minute
(1 U.S. gallon equals 0.8327 Imperial gallon).
Diff.*
Pressure
P
(psi)
1060
1080
1100
1120
1140
1160
1180
1200
1220
1240
1260
1280
1300
1320
1340
1360
1380
1400
1420
1440
1460
1480
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000
5500
6000
6600
D
0.110
E
0.196
F
0.307
G
0.503
100
101
102
103
104
105
106
107
108
109
109
110
111
112
113
114
114
115
116
117
118
119
119
123
127
131
134
138
141
145
148
151
154
157
160
163
166
169
172
175
177
180
183
185
188
190
193
195
198
200
202
205
207
209
212
214
216
218
229
239
251
179
181
182
184
186
187
189
191
192
194
195
197
198
200
201
203
204
206
207
209
210
212
213
220
227
234
240
246
252
258
264
270
275
281
286
291
297
302
307
312
316
321
326
330
335
339
344
348
353
357
361
365
369
374
378
382
386
390
409
427
448
281
283
286
289
291
294
296
299
301
304
306
309
311
313
316
318
320
323
325
327
330
332
334
345
356
366
376
386
395
405
414
423
431
440
448
457
465
473
480
488
496
503
511
518
525
532
539
546
553
559
566
573
579
585
592
598
604
610
640
460
465
469
473
477
482
486
490
494
498
502
506
510
514
518
521
525
529
533
537
540
544
548
566
583
600
616
633
648
663
678
693
707
721
735
748
762
775
788
800
813
825
837
849
860
872
883
895
ORIFICE LETTER DESIGNATION AND EFFECTIVE AREA, sq. in.
H
J
K
L
M
N
0.785
1.287
1.838
2.853
3.60
4.34
719
725
732
739
745
752
758
765
771
777
784
790
796
802
808
814
820
826
832
838
844
849
855
883
910
937
962
987
1012
1036
1059
1082
1104
1126
1147
1168
1189
1209
1179
1190
1201
1212
1222
1233
1244
1254
1264
1275
1285
1295
1305
1315
1325
1335
1345
1355
1364
1374
1383
1393
1402
1448
1493
1536
1578
1619
1659
1698
1736
1774
1810
1846
1881
1916
1950
1983
1683
1699
1715
1730
1746
1761
1776
1791
1806
1821
1835
1850
1864
1879
1893
1907
1921
1935
1949
1962
1976
1989
2003
2068
2132
2194
2254
2313
2370
2425
2480
2533
2613
2638
2662
2686
2710
2734
2757
2781
2804
2827
2849
2872
2894
2916
2938
2960
2982
3003
3025
3046
3067
3088
3109
3211
3298
3329
3359
3390
3420
3450
3479
3509
3976
4013
4050
P
6.38
Q
11.05
R
16.0
T
26.0
5845
5900
5954
* Differential Pressure (
P) equals inlet pressure (set pressure plus overpressure) at flowing conditions minus back pressure.
†See pages 14 to 43 for Minimum and Maximum Set Pressure Limits.
Please refer to Warranty and Warnings on page 63.
47
Saturated Steam Capacities
Unfired Pressure Vessel Service
Styles JOS and JBS
Set Pressures
5-550 psig
USCS UNITS
(United States Customary System)
Shaded values are JOS only
Set
Pressure
D
(psig)
0.110
*1 psi incr. 6.0
*5 psi incr. 30.3
5
6
7
8
9
10
152
15
180
20
208
30
263
40
324
50
384
60
445
70
506
80
567
90
628
100
688
110
749
120
810
130
871
140
931
150
992
160
1053
170
1114
180
1174
190
1235
200
1296
210
1357
220
1417
230
1478
240
1539
250
1600
260
1660
270
1721
280
1782
290
1843
300
1903
310
1964
320
2025
330
2086
340
2146
350
2207
360
2268
370
2329
380
2389
390
2450
400
2511
410
2572
420
2632
430
2693
440
2754
450
2815
460
2876
470
2936
480
2997
490
3058
500
3119
510
3179
520
3240
530
3301
540
3362
550
3422
E
0.196
10.8
54.1
252
262
272
321
371
469
577
685
794
902
1010
1118
1227
1335
1443
1552
1660
1768
1876
1985
2093
2201
2309
2418
2526
2634
2742
2851
2959
3067
3175
3284
3392
3500
3608
3717
3825
3933
4041
4150
4258
4366
4474
4583
4691
4799
4908
5016
5124
5232
5341
5449
5557
5665
5774
5882
5990
6098
F
0.307
16.9
84.7
341
361
379
395
411
427
504
581
735
904
1074
1244
1413
1583
1752
1922
2091
2261
2430
2600
2770
2939
3109
3278
3448
3617
3787
3957
4126
4296
4465
4635
4804
4974
5144
5313
5483
5652
5822
5991
6161
6331
6500
6670
6839
7009
7178
7348
7518
7687
7857
8026
8196
8365
8535
8704
8874
9044
9213
9383
9552
G
0.503
27.7
138
559
592
621
647
674
699
825
952
1204
1482
1760
2038
2316
2593
2871
3149
3427
3705
3983
4260
4538
4816
5094
5372
5649
5927
6205
6483
6761
7039
7316
7594
7872
8150
8428
8706
8983
9261
9539
9817
10095
10373
10650
10928
11206
11484
11762
12039
12317
12595
12873
13151
13429
13706
13984
14262
14540
14818
15096
15373
15651
Capacities certified by the National Board of
Boiler and Pressure Vessel Inspectors and
in accordance with the ASME Boiler and
Pressure Vessel Code, Section VIII.
ORIFICE LETTER DESIGNATION AND EFFECTIVE AREA, sq. in.
H
J
K
L
M
N
P
0.785
1.287
1.838
2.853
3.60
4.34
6.38
43.3
71.0
101
157
198
239
352
216
355
507
787
994
1198
1761
873
1431
2044
924
1516
2165
3361
969
1589
2270
3524
7881
1010
1657
2367
3674
4636
5589
8216
1052
1725
2464
3824
4826
5818
8553
1091
1790
2556
3968
5007
6036
8873
1288
2113
3017
4684
5911
7126
10475
1486
2436
3479
5400
6814
8215
12077
1880
3082
4402
6833
8622 10394
15280
2313
3793
5417
8409
10610 12792
18804
2747
4504
6432
9984
12599 15189
22328
3180
5215
7447
11560
14587 17586
25852
3614
5925
8463
13136
16576 19983
29376
4048
6636
9478
14712
18564 22380
32900
4481
7347 10493
16288
20552 24777
36424
4915
8058 11508
17864
22541 27174
39948
5348
8769 12523
19439
24529 29572
43472
5782
9480 13539
21015
26518 31969
46996
6216
10191 14554
22591
28506 34366
50520
6649
10901 15569
24167
30495 36763
54044
7083
11612 16584
25743
32483 39160
57567
7516
12323 17599
27318
34471 41557
61091
7950
13034 18615
28894
36460 43954
64615
8383
13745 19630
30470
38448 46352
68139
8817
14456 20645
32046
40437 48749
71663
9251
15167 21660
33622
42425 51146
75187
9684
15877 22675
35198
44413 53543
78711
10118
16588 23690
36773
46402 55940
82235
10551
17299 24706
38349
48390 58337
85759
10985
18010 25721
39925
50379 60734
89283
11419
18721 26736
41501
52367 63132
92807
11852
19432 27751
43077
54356 65529
96330
12286
20143 28766
44652
56344 67926
99854
12719
20853 29782
46228
58332 70323 103378
13153
21564 30797
47804
60321 72720 106902
13586
22275 31812
49380
62309 75117 110426
14020
22986 32827
50956
64298 77514 113950
14454
23697 33842
52532
66286 79912 117474
14887
24408 34858
54107
68274 82309 120998
15321
25119 35873
55683
70263 84706 124522
15754
25830 36888
57259
72251 87103 128046
16188
26540 37903
58835
74240 89500 131570
16622
27251 38918
60411
76228 91897 135094
17055
27962 39934
61986
78217 94294 138617
17489
28673 40949
63562
80205 96692 142141
17922
29384 41964
65138
82193 99089 145665
18356
30095 42979
66714
84182 101486 149189
18789
30806 43994
68290
86170 103883 152713
19223
31516 45010
69866
88159 106280 156237
19657
32227 46025
71441
90147 108677 159761
20090
32938 47040
73017
92135 111074 163285
20524
33649 48055
74593
94124 113472 166809
20957
34360 49070
76169
96112 115869 170333
21391
35071 50086
77745
98101 118266 173857
21825
35782 51101
79320 100089 120663 177380
22258
36492 52116
80896 102077 123060 180904
22692
37203 53131
82472 104066 125457 184428
23125
37914 54146
84048 106054 127854 187952
23559
38625 55162
85624 108043 130252 191476
23993
39336 56177
87200 110031 132649 195000
24426
40047 57192
88775 112020 135046 198524
†Capacities below 30 psig set pressure are calculated at 3 psig overpressure.
*Not valid below 30 psig set pressure.
48
Capacity in pounds per hour of
steam at 10% overpressure.†
Valve discharging to atmospheric
pressure.
Please refer to Warranty and Warnings on page 63.
Q
11.05
610
3051
12292
13018
13649
14231
14814
15369
18143
20917
26466
32569
38672
44776
50879
56982
63086
69189
75292
81396
87499
93602
99706
105809
111912
118016
124119
130222
136326
142429
148532
154636
160739
166842
172946
179049
185152
191256
197359
203462
209566
215669
221772
227876
233979
240082
246186
252289
258392
264496
270599
276702
282806
288909
295012
301116
307219
313322
319426
325529
331632
337736
343839
R
16.0
883
4418
T
26.0
1436
7180
T2
27.872
1539
7697
20606
21450
22254
26271
30288
38322
47159
55996
64834
73671
82509
91346
100183
109021
117858
126696
135533
144370
153208
162045
170883
179720
188557
197395
206232
215070
223907
232744
241582
250419
259257
268094
276931
33484
34857
36163
42690
49218
62273
76634
90995
105355
119716
134077
148438
162798
177159
191520
205881
220242
234602
248963
263324
277685
292045
306406
320767
335128
349489
363849
378210
392571
406932
421292
435653
450014
35895
37367
38766
45764
52762
66757
82151
97546
112941
128336
143730
159125
174520
189915
205309
220704
236099
251494
266888
282283
297678
313073
328468
343862
359257
374652
390047
405441
420836
436231
451626
467020
482415
Saturated Steam Capacities
Unfired Pressure Vessel Service
Styles JOS and JBS
Set Pressures
560-1700 psig
Set
Pressure
(psig)
1 psi incr.
5 psi incr.
560
570
580
590
600
620
640
660
680
700
720
740
760
780
800
820
840
860
880
900
920
940
960
980
1000
1020
1040
1060
1080
1100
1120
1140
1160
1180
1200
1220
1240
1260
1280
1300
1320
1340
1360
1380
1400
1420
1440
1460
1480
1500
1520
1540
1560
1580
1600
1620
1640
1660
1680
1700
D
0.110
6.0
30.3
3483
3544
3605
3665
3726
3848
3969
4091
4212
4334
4455
4577
4698
4820
4941
5063
5184
5306
5427
5549
5670
5792
5913
6035
6156
6278
6399
6521
6642
6764
6885
7007
7129
7250
7372
7493
7615
7736
7858
7979
8101
8222
8312
8443
8575
8706
8839
8971
9105
9238
9373
9507
9642
9778
9914
10051
10188
10326
10465
10604
E
0.196
10.8
54.1
6207
6315
6423
6531
6640
6856
7073
7289
7506
7722
7939
8155
8372
8588
8805
9021
9238
9454
9671
9887
10104
10320
10537
10753
10970
11187
11403
11620
11836
12053
12269
12486
12702
12919
13135
13352
13568
13785
14001
14218
14434
14651
14811
15045
15279
15514
15749
15986
16223
16461
16700
16940
17181
17423
17666
17909
18154
18400
18647
18895
USCS UNITS
(United States Customary System)
F
0.307
16.9
84.7
9722
9891
10061
10231
10400
10739
11078
11418
11757
12096
12435
12774
13113
13452
13792
14131
14470
14809
15148
15487
15826
16165
16505
16844
17183
17522
17861
18200
18539
18879
19218
19557
19896
20235
20574
20913
21252
21592
21931
22270
22609
22948
23200
23565
23932
24300
24669
25039
25411
25784
26159
26535
26912
27290
27671
28052
28436
28821
29207
29595
ORIFICE LETTER DESIGNATION AND EFFECTIVE AREA, sq. in.
G
H
J
K
L
M
N
0.503
0.785
1.287
1.838
2.853
3.60
4.34
27.7
43.3
71.0
101
157
198
239
138
216
355
507
787
994
1198
15929 24860 40758 58207
90351 114008 137443
16207 25293 41468 59222
91927 115996 139840
16485 25727 42179 60238
93503 117985 142237
16762 26160 42890 61253
95079 119973 144634
17040 26594 43601 62268
96655 121962 147032
17596 27461 45023 64298
99806 125938 151826
18152 28328 46444 66329 102958 129915 156620
18707 29196 47866 68359 106109 133892 161415
19263 30063 49288 70390 109261 137869 166209
19819 30930 50710 72420 112413 141846 171003
20374 31797 52131 74450 115564 145823 175797
20930 32664 53553 76481 118716 149799 180592
21486 33531 54975 78511 121868 153776 185386
22041 34399 56396 80541 125019 157753 190180
22597 35266 57818 82572 128171 161730 194975
23152 36133 59240 84602 131323 165707 199769
23708 37000 60662 86633 134474 169684 204563
24264 37867 62083 88663 137626 173660 209357
24819 38734 63505 90693 140777 177637 214152
25375 39602 64927 92724 143929 181614 218946
25931 40469 66348 94754 147081 185591 223740
26486 41336 67770 96785 150232 189568 228535
27042 42203 69192 98815 153384 193545 233329
27598 43070 70614 100845 156536 197521 238123
28153 43937 72035 102876 159687 201498 242917
28709 44805 73457 104906 162839 205475
29265 45672 74879 106937 165991 209452
29820 46539 76300 108967 169142 213429
30376 47406 77722 110997 172294 217406
30932 48273 79144 113028 175445 221382
31487 49140 80566 115058 178597
32043 50008 81987 117089 181749
32599 50875 83409 119119 184900
33154 51742 84831 121149 188052
33710 52609 86252 123180 191204
34266 53476 87674 125210 194355
34821 54343 89096 127241 197507
35377 55211 90518 129271 200659
35932 56078 91939 131301 203810
36488 56945 93361 133332 206962
37044 57812 94783 135362 210113
37599 58679 96204 137392 213265
38012 59323 97259 138899 215603
38610 60257 98791 141087 219000
39211 61195 100329 143282 222408
39814 62136 101871 145485 225827
40419 63080 103419 147695 229257
41026 64027 104972 149913 232700
41635 64977 106530 152139 236155
42246 65931 108094 154372 239622
42860 66889 109664 156614
43475 67850 111239 158864
44094 68814 112821 161123
44714 69783 114408 163390
45337 70755 116002 165666
45962 71731 117602 167951
46590 72711 119209 170246
47221 73695 120823 172550
47854 74683 122443 174864
48490 75676 124070 177189
Capacity in pounds per hour of
steam at 10% overpressure.
Valve discharging to atmospheric
pressure.
Capacities certified by the National Board of
Boiler and Pressure Vessel Inspectors and
in accordance with the ASME Boiler and
Pressure Vessel Code, Section VIII.
P
6.38
352
1761
202048
205572
209096
212620
216144
223191
230239
237287
244335
251383
258430
265478
272526
279574
286622
293670
300717
307765
314813
321861
328909
335957
343004
350052
357100
Q
11.05
610
3051
349942
356046
362149
368252
374356
R
16.0
883
4418
Please refer to Warranty and Warnings on page 63.
T
26.0
1436
7180
T2
27.872
1539
7697
49
Saturated Steam Capacities
Unfired Pressure Vessel Service
Styles JOS and JBS
Set Pressures
1720-2900 psig
Set
Pressure
(psig)
1 psi incr.
5 psi incr.
1720
1740
1760
1780
1800
1820
1840
1860
1880
1900
1920
1940
1960
1980
2000
2020
2040
2060
2080
2100
2120
2140
2160
2180
2200
2220
2240
2260
2280
2300
2320
2340
2360
2380
2400
2420
2440
2460
2480
2500
2520
2540
2560
2580
2600
2620
2640
2660
2680
2700
2720
2740
2760
2780
2800
2820
2840
2860
2880
2900
D
0.110
6.0
30.3
10744
10884
11025
11167
11309
11452
11596
11740
11885
12031
12178
12326
12474
12623
12773
12924
13076
13229
13383
13538
13694
13851
14009
14169
14329
14491
14654
14818
14983
15150
15318
15488
15659
15832
16006
16182
16360
16539
16720
16904
17089
17276
17465
17657
17850
18046
18245
18446
18650
18856
19066
19278
19493
19712
19934
20159
20388
20621
20858
21100
E
0.196
10.8
54.1
19143
19394
19645
19897
20151
20406
20662
20919
21178
21438
21699
21962
22227
22493
22760
23029
23300
23573
23847
24123
24401
24681
24962
25246
25532
25820
26110
26403
26698
26995
27295
27597
27902
28210
28520
28834
29151
29470
29793
30120
30450
30783
31120
31461
31807
32156
32510
32868
33231
33599
33972
34350
34734
35123
35519
35921
36329
36744
37166
37596
USCS UNITS
(United States Customary System)
F
0.307
16.9
84.7
29985
30377
30770
31166
31563
31962
32363
32766
33172
33579
33989
34400
34815
35231
35650
36072
36496
36923
37352
37785
38220
38658
39100
39544
39992
40443
40898
41356
41818
42283
42753
43226
43704
44186
44673
45164
45660
46160
46666
47177
47694
48217
48745
49279
49820
50367
50921
51482
52051
52627
53211
53803
54405
55015
55634
56264
56903
57553
58215
58888
G
0.503
27.7
138
49129
49771
50416
51063
51714
52368
53025
53686
54350
55017
55688
56363
57042
57725
58411
59102
59797
60496
61200
61908
62621
63340
64063
64791
65525
66264
67008
67759
68516
69279
70048
70824
71606
72396
73193
73998
74811
75631
76460
77298
78144
79000
79866
80741
81627
82523
83431
84351
85282
86226
87183
88154
89139
90138
91153
92185
93233
94298
95382
96485
ORIFICE LETTER DESIGNATION AND EFFECTIVE AREA, sq. in.
H
J
K
L
M
N
0.785
1.287
1.838
2.853
3.60
4.34
43.3
71.0
101
157
198
239
216
355
507
787
994
1198
76673 125705 179523
77674 127347 181868
78681 128996 184223
79691 130654 186590
80707 132319 188968
81728 133992 191358
82753 135674 193759
83784 137364 196173
84821 139063 198600
85862 140771 201039
86910 142488 203491
87963 144215 205957
89022 145951
90087 147698
91159 149454
92237 151222
93321 153000
94413 154789
95511 156590
96617 158402
97730 160227
98850 162064
99979 163915
101115 165778
102260 167655
103414 169546
104576 171452
105747 173372
106928 175308
108119 177260
109319 179229
110530 181214
111752 183217
112985 185237
114229 187277
115484 189336
116752 191415
118033
119327
)
50
Please refer to Warranty and Warnings on page 63.
Capacity in pounds per hour of
steam at 10% overpressure.
Valve discharging to atmospheric
pressure.
Capacities certified by the National Board of
Boiler and Pressure Vessel Inspectors and
in accordance with the ASME Boiler and
Pressure Vessel Code, Section VIII.
P
6.38
352
1761
Q
11.05
610
3051
R
16.0
883
4418
T
26.0
1436
7180
T2
27.872
1539
7697
Equivalents and Conversion Factors
This table may be used in two ways
(1) Multiply the unit under column A by the figure under column B, the result is the unit under column C.
(2) Divide the unit under column C by the figure under column B, the result is then the unit under column A.
A
MULTIPLY
B
BY
C
TO OBTAIN
Atmospheres
Atmospheres
Atmospheres
Atmospheres
Atmospheres
Atmospheres
Atmospheres
Atmospheres
14.70
1.033
29.92
760.0
407.2
33.93
1.013
101.3
Pounds per square inch
Kilograms per sq. cm
Inches of mercury
Millimeters of mercury
Inches of water
Feet of water
Bars
KiloPascals
Barrels
Bars
Bars
Bars
42.00
14.50
1.020
100.0
Gallons (U.S.)
Pounds per square inch
Kilograms per sq. cm
KiloPascals
Centimeters
0.3937
Centimeters
0.03281
Centimeters
0.010
Centimeters
0.01094
Cubic centimeters
0.06102
Cubic feet
7.481
Cubic feet
0.1781
Cubic feet per minute
0.02832
Cubic feet per second
448.8
Cubic inches
16.39
Cubic inches
0.004329
Cubic meters
264.2
Cubic meters per hour
4.403
Cubic meters per minute
35.31
Standard cubic feet per min.
60.00
Standard cubic feet per min. 1440.
Standard cubic feet per min.
0.02716
Standard cubic feet per min.
1.630
Standard cubic feet per min.
39.11
Standard cubic feet per min.
0.02832
Standard cubic feet per min.
1.699
Standard cubic feet per min.
40.78
Inches
Feet
Meters
Yards
Cubic inches
Gallons
Barrels
Cubic meters per minute
Gallons per minute
Cubic centimeters
Gallons
Gallons
Gallons per minute
Cubic feet per minute
Standard cubic ft. per hr
Standard cubic ft. per day
Nm3/min.
Nm3/hr.
Nm3/day
Sm3 /min.
Sm3/hr.
Sm3 /day
Feet
Feet
Feet
Feet of water
Feet of water
Meters
Yards
Centimeters
Inches of mercury
Pounds per square inch
Gallons(U.S.)
Gallons(U.S.)
Gallons(U.S.)
Gallons(Imperial)
Gallons(U.S.)
Gallons(U.S.)
Gallons of water
Gallons of liquid
per minute
Gallons per minute
Gallons per minute
Gallons per minute
Gallons per minute
Gallons per minute
Grams
Inches
Inches
Inches
Inches
Inches
Inches
Inches
Inches
of
of
of
of
mercury
mercury
mercury
mercury
0.3048
0.3333
30.48
0.8818
0.4335
3785.
0.1337
231.0
277.4
0.8327
3.785
8.337
500 x Sp. Gr.
0.002228
227.0 x SG
.06309
3.785
.2271
.03527
Cubic centimeters
Cubic feet
Cubic inches
Cubic inches
Gallons (Imperial)
Liters
Pounds (at 60F)
Pounds per hour liquid
(at 60F)
Cubic feet per second
Kilograms per hour
Liters per second
Liters per minute
M3/hr.
Ounces
2.540
0.08333
0.0254
0.02778
1.133
0.4912
0.03342
0.03453
Centimeters
Feet
Meters
Yards
Feet of water
Pounds per square inch
Atmospheres
Kilograms per sq. cm
A
MULTIPLY
B
BY
Inches of water
Inches of water
0.03613
0.07355
Kilograms
Kilograms
Kilograms
Kilograms per minute
Kilograms per sq. cm
Kilograms per sq. cm
Kilograms per sq. cm
Kilograms per cubic meter
KiloPascals
KiloPascals
KiloPascals
Liters
Liters
Liters
Liters per hour
2.205
0.001102
35.27
132.3
14.22
0.9678
28.96
16.018
0.1450
0.0100
0.01020
0.03532
1000.
0.2642
0.004403
C
TO OBTAIN
Pounds per sq. in.
Inches of mercury
Pounds
Short tons (2000 lbs.)
Ounces
Pounds per hour
Pounds per sq. in.
Atmospheres
Inches of mercury
Pounds per cubic foot
Pounds per sq. in.
Bars
Kilograms per sq. cm
Cubic feet
Cubic centimeters
Gallons
Gallons per minute
Meters
Meters
Meters
Meters
3.281
1.094
100.0
39.37
Pounds
Pounds
Pounds
Pounds
Pounds
Pounds
Pounds per hour
Pounds per hour
Pounds per hour liquid
0.1199
Gallons H2 O @ 60F (U.S.)
453.6
Grams
0.0005
Short tons (2000 lbs.)
0.4536
Kilograms
0.0004536 Metric tons
16.00
Ounces
6.323/M.W. Cubic feet per minute
.4536
Kilograms per hour
0.002/Sp.Gr.
Gallons per minute
liquid (at 60F)
27.68
Inches of water
2.307
Feet of water
2.036
Inches of mercury
0.07031
Kilograms per sq. cm
0.0680
Atmospheres
51.71
Millimeters of mercury
0.7032
Meters of water
0.06895
Bar
6.895
KiloPascals
Pounds
Pounds
Pounds
Pounds
Pounds
Pounds
Pounds
Pounds
Pounds
per sq.
per sq.
per sq.
per sq.
per sq.
per sq.
per sq.
per sq.
per sq.
inch
inch
inch
inch
inch
inch
inch
inch
inch
Specific gravity
(of gas or vapors)
Square centimeter
Square inch
Square inch
SSU
SSU
Water (cubic feet)
Temperature:
Centigrade
Kelvin
Fahrenheit
Fahrenheit +460
Fahrenheit (F+460) 5/9
Feet
Yards
Centimeters
Inches
28.97
Molecular weight
(of gas or vapors)
0.1550
Square inch
6.4516
Square centimeter
645.16
Square millimeter
0.2205 x SG Centipoise
0.2162
Centistoke
62.4
=
=
=
=
=
Pounds (at 60F)
5/9 (Fahrenheit - 32)
Centigrade + 273
9/5 (Centigrade)+32
Rankine
Kelvin
Please refer to Warranty and Warnings on page 63.
51
Air Capacities
Styles JOS and JBS
Set Pressures
0.35-88 barg
Capacity in standard cubic
meters of air per minute at 16C
and 10% overpressure.†
Valve discharging to atmospheric
pressure.
Capacities certified by the National Board of
Boiler and Pressure Vessel Inspectors and
in accordance with the ASME Boiler and
Pressure Vessel Code, Section VIII.
METRIC UNITS
Shaded values are JOS only
Set
Pressure
(barg)
D
71.0
E
126
F
198
ORIFICE LETTER DESIGNATION AND EFFECTIVE AREA, sq mm
G
H
J
K
L
M
N
P
325
506
830
1186
1841
2323
2800
4116
Q
7129
R
10323
T
16774
T2
17981
Set
Pressure
(kPag)
1 bar incr.
5 bar incr.
0.8
4.4
1.5
7.9
2.4
12.3
4.0
20.3
6.3
31.6
10.3
51.9
14.8
74.2
89.2
446
129
646
209
1049
225
1125
100 kPa incr.
500 kPa incr.
2.5
2.6
2.6
2.7
2.8
2.9
2.9
3.0
3.1
3.1
4.6
7.7
10.9
14.1
17.2
20.4
23.6
26.7
29.9
33.1
36.2
39.4
42.6
45.7
48.9
52.1
55.2
58.4
61.6
64.7
67.9
71.1
74.2
77.4
80.6
83.7
86.9
90.0
93.2
96.4
99.5
102
105
109
112
115
118
121
124
128
131
134
137
140
3.4
3.6
3.7
3.8
3.9
4.0
4.2
4.3
4.4
4.5
4.6
4.7
4.8
5.0
7.2
12.2
17.1
22.1
27.0
32.0
36.9
41.9
46.9
51.8
56.8
61.7
66.7
71.7
76.6
81.6
86.5
91.5
96.4
101
106
111
116
121
126
131
136
141
146
151
155
160
165
170
175
180
185
190
195
200
205
210
215
220
5.6
5.9
6.1
6.3
6.5
6.7
6.9
7.0
7.2
7.4
7.6
7.8
8.0
8.1
11.8
19.9
28.1
36.2
44.3
52.4
60.6
68.7
76.8
84.9
93.1
101
109
117
125
133
141
149
158
166
174
182
190
198
206
214
223
231
239
247
255
263
271
279
288
296
304
312
320
328
336
344
353
361
8.8
9.2
9.5
9.8
10.1
10.4
10.7
11.0
11.3
11.6
11.9
12.2
12.5
12.7
18.5
31.1
43.8
56.5
69.2
81.9
94.5
107
119
132
145
157
170
183
196
208
221
234
246
259
272
284
297
310
322
335
348
360
373
386
398
411
424
436
449
462
474
487
500
512
525
538
551
563
14.5
15.1
15.6
16.1
16.6
17.1
17.6
18.1
18.6
19.0
19.5
20.0
20.5
20.9
30.4
51.1
71.9
92.7
113
134
155
175
196
217
238
259
279
300
321
342
362
383
404
425
446
466
487
508
529
550
570
591
612
633
653
674
695
716
737
757
778
799
820
841
861
882
903
924
20.7
21.6
22.3
23.1
23.8
24.5
25.2
25.9
26.5
27.2
27.9
28.6
29.2
29.9
43.4
73.0
102
132
162
191
221
251
280
310
340
369
399
429
458
488
518
548
577
607
637
666
696
726
755
785
815
844
874
904
933
963
993
1023
1052
1082
1112
1141
1171
1201
1230
1260
1290
1319
0.35
0.40
0.45
0.50
0.55
0.60
0.65
0.70
0.75
0.80
0.85
0.90
0.95
1
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
62
64
66
68
70
72
74
76
78
80
82
84
86
88
1.5
1.5
1.6
1.6
1.7
1.7
1.7
2.6
4.3
6.1
7.9
9.7
11.4
13.2
15.0
16.8
18.5
20.3
22.1
23.9
25.6
27.4
29.2
31.0
32.7
34.5
36.3
38.1
39.9
41.6
43.4
45.2
47.0
48.7
50.5
52.3
54.1
55.8
57.6
59.4
61.2
63.0
64.7
66.5
68.3
70.1
71.8
73.6
75.4
77.2
78.9
23.0
115
34.7
35.8
37.0
38.0
39.1
40.2
41.2
42.3
43.3
44.4
45.4
46.5
67.4
113
159
205
251
297
343
389
435
482
528
574
620
666
712
758
804
850
896
942
988
1034
1081
1127
1173
1219
1265
1311
1357
1403
1449
1495
1541
1587
1634
1680
1726
1772
1818
1864
1910
1956
2002
2048
29.0
145
46.6
48.0
49.4
50.7
52.0
53.3
54.7
56.0
57.3
58.6
85.1
143
201
259
317
375
433
491
550
608
666
724
782
840
898
957
1015
1073
1131
1189
1247
1305
1364
1422
1480
1538
1596
1654
1713
1771
1829
1887
1945
2003
2061
2120
2178
†Capacities below 2.0 bar set pressure are calculated at 0.2 bar overpressure.
52
Please refer to Warranty and Warnings on page 63.
35.0
175
56.2
57.9
59.5
61.1
62.7
64.3
65.9
67.5
69.1
70.7
102
172
242
312
382
452
522
593
663
733
803
873
943
1013
1083
1153
1223
1294
1364
1434
1504
1574
1644
1714
1784
1854
1924
1995
2065
2135
2205
2275
2345
2415
51.5
257
80.2
82.7
85.1
87.6
89.9
92.2
94.6
96.9
99.3
101
104
150
253
356
459
562
665
768
871
974
1077
1180
1284
1387
1490
1593
1696
1799
1902
2005
2108
2211
2314
2417
2520
2623
2726
2829
2932
3035
3138
3241
3344
3448
3551
124
129
134
139
143
147
151
155
159
163
167
172
176
180
261
439
617
796
974
1153
1331
1510
1688
1866
2045
2223
2402
2580
2759
2937
3116
3294
3473
3651
207
213
219
225
231
237
243
249
254
260
378
635
894
1152
1411
1669
1928
2186
2444
2703
337
347
357
366
376
385
395
404
414
423
614
1033
1453
1873
2293
2713
3133
3552
3972
4392
361
372
382
392
403
413
423
433
444
454
658
1107
1557
2008
2458
2908
3358
3808
4258
4709
35
40
45
50
55
60
65
70
75
80
85
90
95
100
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
4400
4600
4800
5000
5200
5400
5600
5800
6000
6200
6400
6600
6800
7000
7200
7400
7600
7800
8000
8200
8400
8600
8800
Air Capacities
Styles JOS and JBS
Set Pressures
90-410 barg
Capacity in standard cubic
meters of air per minute at 16C
and 10% overpressure. Valve
discharging to atmospheric
pressure.
Set
Pressure
(barg)
D
71.0
E
126
F
198
ORIFICE LETTER DESIGNATION AND EFFECTIVE AREA, sq mm
G
H
J
K
L
M
N
P
325
506
830
1186
1841
2323
2800
4116
Capacities certified by the National Board of
Boiler and Pressure Vessel Inspectors and
in accordance with the ASME Boiler and
Pressure Vessel Code, Section VIII.
Set
T2
Q
R
T
Pressure
7129
10323
16774 17981
(kPag)
1 bar incr.
5 bar incr.
0.8
4.4
1.5
7.9
2.4
12.3
4.0
20.3
6.3
31.6
10.3
51.9
14.8
74.2
23.0
115
89.2
446
90
92
94
96
98
100
102
104
106
108
110
112
114
116
118
120
122
124
126
128
130
132
134
136
138
140
142
144
146
148
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
360
370
380
390
400
410
80.7
82.5
84.3
86.0
87.8
89.6
91.4
93.2
94.9
96.7
98.5
100
102
103
105
107
109
110
112
114
116
118
119
121
123
125
126
128
130
132
134
142
151
160
169
178
187
196
205
214
222
231
240
249
258
267
276
285
293
302
311
320
329
338
347
356
365
143
147
150
153
156
159
162
166
169
172
175
178
181
185
188
191
194
197
200
204
207
210
213
216
219
223
226
229
232
235
238
254
270
286
302
318
333
349
365
381
397
412
428
444
460
476
492
507
523
539
555
571
587
602
618
634
650
225
230
235
240
245
250
255
260
265
270
275
279
284
289
294
299
304
309
314
319
324
329
334
339
344
349
354
359
364
369
374
398
423
448
473
498
522
547
572
597
622
646
671
696
721
746
770
795
820
845
369
377
385
393
401
409
418
426
434
442
450
458
466
474
483
491
499
507
515
523
531
539
548
556
564
572
580
588
596
604
613
653
694
734
775
816
856
897
938
978
1019
576
589
601
614
627
639
652
665
677
690
703
715
728
741
753
766
779
791
804
817
829
842
855
868
880
893
906
918
931
944
956
1020
1083
1146
1210
944
965
986
1007
1028
1048
1069
1090
1111
1132
1152
1173
1194
1215
1236
1256
1277
1298
1319
1339
1360
1381
1402
1423
1443
1464
1485
1506
1527
1547
1568
1672
1776
1880
1349
1379
1408
1438
1468
1497
1527
1557
1587
1616
1646
1676
1705
1735
1765
1794
1824
1854
1883
1913
1943
1972
2002
2032
2062
2091
2121
2151
2180
2210
2240
2094
2140
2186
2233
2279
2325
2371
METRIC UNITS
29.0
145
35.0
175
51.5
257
129
646
209
1049
Please refer to Warranty and Warnings on page 63.
225
1125
100 kPa incr.
500 kPa incr.
9000
9200
9400
9600
9800
10000
10200
10400
10600
10800
11000
11200
11400
11600
11800
12000
12200
12400
12600
12800
13000
13200
13400
13600
13800
14000
14200
14400
14600
14800
15000
16000
17000
18000
19000
20000
21000
22000
23000
24000
25000
26000
27000
28000
29000
30000
31000
32000
33000
34000
35000
36000
37000
38000
39000
40000
41000
53
Water Capacities
Styles JLT-JOS and JLT-JBS
Differential Pressures
1-80 bar†
Diff. *
Pressure D
P
71.0
(bar)
1
44.6
2
63.1
3
77.2
4
89.2
5
99.7
6
109
7
118
8
126
9
133
10
141
11
147
12
154
13
160
14
166
15
172
16
178
17
183
18
189
19
194
20
199
21
204
22
209
23
214
24
218
25
223
26
227
27
231
28
236
29
240
30
244
31
248
32
252
33
256
34
260
35
263
36
267
37
271
38
275
39
278
40
282
41
285
42
289
43
292
44
295
45
299
46
302
47
305
48
309
49
312
50
315
52
321
54
327
56
333
58
339
60
345
62
351
64
356
66
362
68
367
70
373
72
378
74
383
76
389
78
394
80
399
Capacity in liters per minute of
water at 21C and 10% overpressure.
P*
Capacities certified by the National Board of
Boiler and Pressure Vessel Inspectors and
in accordance with the ASME Boiler and
Pressure Vessel Code, Section VIII.
METRIC UNITS
ORIFICE LETTER DESIGNATION AND EFFECTIVE AREA, sq. mm.
H
J
K
L
M
N
506
830
1186
1841
2323
2800
E
126
F
198
G
325
79.5
112
137
159
177
194
210
224
238
251
263
275
286
297
307
318
327
337
346
355
364
372
381
389
397
405
413
420
428
435
442
449
456
463
470
477
483
490
496
502
509
515
521
527
533
539
545
550
556
562
573
584
595
605
615
626
636
645
655
665
674
683
693
702
711
124
176
215
249
278
305
329
352
373
393
413
431
449
465
482
498
513
528
542
556
570
584
597
610
622
635
647
659
670
682
693
704
715
726
736
747
757
767
777
787
797
807
816
826
835
844
853
862
871
880
898
915
931
948
964
980
996
1011
1026
1041
1056
1071
1085
1099
1113
204
288
353
408
456
499
539
577
612
645
676
706
735
763
790
816
841
865
889
912
935
957
978
999
1020
1040
1060
1079
1098
1117
1136
1154
1172
1189
1207
1224
1241
1257
1274
1290
1306
1322
1338
1353
1368
1383
1398
1413
1428
1442
1471
1499
1526
1553
1580
1606
1632
1657
1682
1707
1731
1755
1778
1802
1825
318
450
551
636
712
780
842
900
955
1007
1056
1103
1148
1191
1233
1273
1312
1351
1388
1424
1459
1493
1527
1560
1592
1623
1654
1685
1714
1744
1773
1801
1829
1856
1883
1910
1937
1963
1988
2014
2039
2063
2088
2112
2136
2159
2183
2206
2229
2251
2296
2340
2383
2425
2466
2507
2547
2587
2625
2664
2702
2739
2776
2812
2848
522
738
904
1044
1167
1278
1381
1476
1566
1651
1731
1808
1882
1953
2022
2088
2152
2215
2275
2334
2392
2448
2503
2557
2610
2662
2712
2762
2811
2859
2906
2953
2999
3044
3088
3132
3175
3218
3260
3302
3343
3383
3423
3463
3502
3541
3579
3617
3654
3691
3764
3836
3906
3976
4044
4110
4176
4241
4305
4368
4430
4491
4551
4610
4669
745
1054
1291
1491
1667
1826
1972
2108
2236
2357
2472
2582
2688
2789
2887
2982
3074
3163
3250
3334
3416
3497
3575
3652
3728
3801
3874
3945
4015
4083
4151
4217
4283
4347
4411
4473
4535
4596
4656
4715
4774
4832
4889
4945
5001
5057
5111
5165
5219
5272
5376
5479
5579
5678
5775
5870
5964
6057
6148
6238
6326
6414
6500
6585
6668
1157
1636
2004
2314
2587
2834
3062
3273
3472
3659
3838
4009
4172
4330
4482
4629
4771
4910
5044
5175
5303
5428
5550
5669
5786
5901
6013
6124
6232
6339
6443
6547
6648
6748
6847
6944
7039
7134
7227
7319
7410
7500
7589
7677
7763
7849
7934
8018
8101
8183
8345
8504
8660
8814
8964
9113
9258
9402
9543
9683
9820
9956
10089
10221
10351
*Differential Pressure (
1460
2065
2529
2920
3265
3577
3863
4130
4381
4618
4843
5058
5265
5464
5656
5841
6021
6195
6365
6531
6692
6849
7003
7154
7301
7446
7588
7727
7864
7998
8131
8261
8389
8515
8639
8762
8883
9002
9120
9236
9351
9464
9576
9687
9796
9904
10011
10117
10222
10326
10531
10731
10928
11122
11312
11499
11683
11864
12042
12218
12391
12562
12731
12897
13062
1760
2489
3049
3521
3936
4312
4658
4979
5281
5567
5839
6098
6347
6587
6818
7042
7259
7469
7674
7873
8068
8257
8443
8625
8802
8977
9148
9316
9481
9643
9802
9959
10113
10265
10415
10563
10709
10853
10994
11134
11273
11409
11544
11678
11810
11940
12070
12197
12324
12449
12695
12937
13175
13408
13637
13862
14084
14303
14518
14730
14939
15145
P
4116
Q
7129
2588
3660
4482
5176
5787
6339
6847
7320
7764
8184
8583
8965
9331
9683
10023
10352
10671
10980
11281
11574
11860
12139
12412
12679
12940
13197
13448
13695
13937
14175
14410
14640
14867
15091
15311
15528
15743
15954
16162
16368
16572
16773
16971
17167
17361
17553
17743
17931
18117
18300
18663
19018
19367
19710
20047
20379
20705
21026
21342
21654
21961
22264
4482
6339
7764
8965
10023
10980
11859
12678
13447
14175
14867
15528
16162
16772
17361
17930
18482
19018
19539
20046
20541
21025
21497
21960
22413
22856
23292
23719
24139
24552
24958
25357
25750
26137
26519
26895
27266
27632
27993
28350
28702
29050
29394
29734
R
10323
6490
9179
11242
12981
14513
15898
17172
18358
19471
20525
21527
22484
23402
24285
25138
25962
26761
27537
28292
29027
29743
30443
31128
T
16774
10547
14916
18268
21094
23584
25835
27905
29832
31641
33353
34981
36536
38028
39464
40849
42189
43487
44748
45974
47169
48333
49471
50583
P) equals inlet pressure (set pressure plus overpressure) at flowing conditions minus back pressure.
†See pages 14 to 43 for Minimum and Maximum Set Pressure Limits.
54
Please refer to Warranty and Warnings on page 63.
Diff. *
Pressure
P
(kPa)
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000
5200
5400
5600
5800
6000
6200
6400
6600
6800
7000
7200
7400
7600
7800
8000
Water Capacities
Styles JLT-JOS and JLT-JBS
Differential Pressures
82-455 bar†
Diff. *
Pressure D
P
71.0
(bar)
82
404
84
408
86
413
88
418
90
423
92
428
94
432
96
437
98
441
100
446
102
450
104
455
106
459
108
463
110
468
112
472
114
476
116
480
118
484
120
488
122
492
124
496
126
500
128
504
130
508
132
512
134
516
136
520
138
524
140
527
142
531
144
535
146
539
148
542
150
546
160
564
170
581
180
598
190
615
200
631
210
646
220
661
230
676
240
691
250
705
260
719
270
733
280
746
290
759
300
772
310
785
320
798
330
810
340
822
350
834
360
846
370
858
380
869
390
881
400
892
410
903
420
914
430
925
440
936
450
946
455
951
Capacity in liters per minute of
water at 21C and 10%
overpressure.
P*
Capacities certified by the National Board of
Boiler and Pressure Vessel Inspectors and
in accordance with the ASME Boiler and
Pressure Vessel Code, Section VIII.
METRIC UNITS
ORIFICE LETTER DESIGNATION AND EFFECTIVE AREA, sq. mm.
H
J
K
L
M
N
506
830
1186
1841
2323
2800
E
126
F
198
G
325
719
728
737
745
754
762
770
779
787
795
803
810
818
826
833
841
848
856
863
870
878
885
892
899
906
913
920
927
934
940
947
954
960
967
973
1005
1036
1066
1095
1124
1152
1179
1205
1231
1257
1282
1306
1330
1354
1377
1399
1422
1444
1466
1487
1508
1529
1549
1570
1590
1609
1629
1648
1667
1686
1696
1127
1141
1154
1168
1181
1194
1207
1220
1232
1245
1257
1270
1282
1294
1306
1318
1329
1341
1352
1364
1375
1386
1397
1409
1419
1430
1441
1452
1463
1473
1484
1494
1504
1515
1525
1575
1623
1670
1716
1761
1804
1847
1888
1929
1969
2008
2046
2083
2120
2157
2192
2227
2262
2296
2329
2362
2395
1847
1870
1892
1914
1935
1957
1978
1999
2019
2040
2060
2080
2100
2120
2140
2159
2178
2197
2216
2235
2253
2272
2290
2308
2326
2344
2362
2379
2397
2414
2431
2448
2465
2482
2499
2581
2660
2737
2812
2885
2956
3026
3094
3161
3226
3290
3352
3414
2883
2918
2953
2987
3021
3054
3087
3120
3152
3184
3216
3247
3278
3309
3339
3370
3400
3429
3459
3488
3517
3546
3574
3602
3630
3658
3686
3713
3740
3767
3794
3821
3847
3874
3900
4028
4152
4272
4389
4503
4727
4785
4841
4897
4953
5007
5061
5115
5168
5220
5272
5324
5375
5425
5475
5525
5574
5623
5671
5719
5766
5813
5860
5906
5952
5998
6043
6088
6133
6177
6221
6265
6308
6351
6394
6604
6807
7004
7196
7383
6751
6833
6914
6994
7073
7151
7228
7305
7381
7456
7530
7603
7676
7748
7820
7890
7960
8030
8099
8167
8235
8302
8369
8435
8501
8566
8631
8695
8758
8822
8885
8947
9009
9070
9131
9431
10480
10607
10732
10857
10979
11101
11221
11339
11457
11573
11688
11802
11915
12027
12138
12248
12357
P
4116
Q
7129
R
10323
T
16774
13224
13384
Diff. *
Pressure
P
(kPa)
8200
8400
8600
8800
9000
9200
9400
9600
9800
10000
10200
10400
10600
10800
11000
11200
11400
11600
11800
12000
12200
12400
12600
12800
13000
13200
13400
13600
13800
14000
14200
14400
14600
14800
15000
16000
17000
18000
19000
20000
21000
22000
23000
24000
25000
26000
27000
28000
29000
30000
31000
32000
33000
34000
35000
36000
37000
38000
39000
40000
41000
42000
43000
44000
45000
45500
*Differential Pressure (
P) equals inlet pressure (set pressure plus overpressure) at flowing conditions minus back pressure.
†See pages 14 to 43 for Minimum and Maximum Set Pressure Limits.
Please refer to Warranty and Warnings on page 63.
55
Saturated Steam Capacities
Unfired Pressure Vessel Service
Styles JOS and JBS
Set Pressures
0.35-76 barg
METRIC UNITS
Capacity in kilograms per
hour of steam at 10% overpressure.† Valve discharging to
atmospheric pressure.
Capacities certified by the National Board of
Boiler and Pressure Vessel Inspectors and
in accordance with the ASME Boiler and
Pressure Vessel Code, Section VIII.
Shaded values are JOS only
Set
Pressure
(barg)
*0.1 bar incr.
*0.5 bar incr.
0.35
0.40
0.45
0.50
0.55
0.60
0.65
0.70
0.75
0.80
0.85
0.90
0.95
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
62
64
66
68
70
72
74
76
D
71.0
3.9
19.9
E
126
7.1
35.6
69.7
71.5
73.4
75.2
77.0
78.8
80.6
117
156
196
236
276
316
356
396
436
476
516
556
596
636
676
716
756
796
836
916
996
1076
1155
1235
1315
1395
1475
1555
1635
1715
1795
1875
1955
2035
2115
2195
2275
2355
2434
2514
2594
2674
2754
2834
2914
2994
3074
114
117
121
124
127
130
134
137
140
143
208
279
350
421
492
564
635
706
777
849
920
991
1062
1133
1205
1276
1347
1418
1489
1632
1774
1917
2059
2202
2344
2487
2629
2771
2914
3056
3199
3341
3484
3626
3768
3911
4053
4196
4338
4481
4623
4766
4908
5050
5193
5335
5478
F
198
11.1
55.7
155
162
168
173
179
184
189
194
199
204
209
215
220
225
326
437
548
660
772
883
995
1106
1218
1329
1441
1552
1664
1776
1887
1999
2110
2222
2333
2556
2780
3003
3226
3449
3672
3895
4118
4341
4564
4787
5011
5234
5457
5680
5903
6126
6349
6572
6795
7018
7242
7465
7688
7911
8134
8357
8580
ORIFICE LETTER DESIGNATION AND EFFECTIVE AREA, sq. mm.
G
H
J
K
L
M
N
P
325
506
830
1186
1841
2323
2800
4116
18.2
28.5
46.7
66.7
103
130
157
231
91.3
142
233
333
518
654
788
1159
255
398
652
932
266
415
680
972
275
430
705
1007
1563
284
444
728
1040
1614
3611
293
458
751
1072
1665
2101
2533
3723
302
471
773
1104
1713
2162
2607
3832
310
485
795
1135
1762
2224
2681
3941
319
497
816
1165
1809
2283
2753
4047
327
510
837
1196
1856
2343
2824
4152
335
523
858
1226
1904
2402
2896
4257
344
536
880
1257
1951
2462
2968
4363
352
549
901
1287
1998
2521
3039
4468
360
562
922
1317
2045
2580
3111
4574
368
575
943
1348
2092
2640
3183
4679
535
835
1369
1955
3034
3829
4616
6786
716
1118
1833
2618
4065
5129
6183
9090
899
1403
2301
3286
5101
6437
7760 11408
1082
1688
2769
3954
6138
7745
9337 13727
1265
1974
3236
4622
7175
9053 10914 16045
1447
2259
3704
5290
8211 10361 12491 18363
1630
2544
4172
5958
9248 11669 14068 20681
1813
2829
4639
6626 10285 12978 15645 23000
1996
3115
5107
7293 11321 14286 17222 25318
2178
3400
5574
7961 12358 15594 18799 27636
2361
3685
6042
8629 13395 16902 20376 29954
2544
3970
6510
9297 14431 18210 21953 32272
2727
4256
6977
9965 15468 19518 23530 34591
2909
4541
7445 10633 16505 20826 25107 36909
3092
4826
7913 11300 17541 22134 26684 39227
3275
5111
8380 11968 18578 23442 28261 41545
3458
5397
8848 12636 19615 24750 29838 43863
3641
5682
9316 13304 20651 26058 31415 46182
3823
5967
9783 13972 21688 27367 32992 48500
4189
6538 10718 15308 23761 29983 36146 53136
4554
7108 11654 16643 25834 32599 39300 57773
4920
7678 12589 17979 27908 35215 42454 62409
5285
8249 13524 19315 29981 37831 45608 67046
5651
8819 14460 20650 32054 40447 48762 71682
6017
9390 15395 21986 34128 43064 51916 76319
6382
9960 16330 23322 36201 45680 55070 80955
6748 10531 17265 24657 38274 48296 58223 85591
7113 11101 18201 25993 40348 50912 61377 90228
7479 11672 19136 27329 42421 53528 64531 94864
7844 12242 20071 28665 44494 56144 67685 99501
8210 12813 21007 30000 46568 58761 70839 104137
8575 13383 21942 31336 48641 61377 73993 108774
8941 13954 22877 32672 50714 63993 77147 113410
9306 14524 23812 34007 52788 66609 80301 118046
9672 15095 24748 35343 54861 69225 83455 122683
10037 15665 25683 36679 56934 71841 86609 127319
10403 16236 26618 38014 59008 74458 89763 131956
10768 16806 27554 39350 61081 77074 92917 136592
11134 17376 28489 40686 63154 79690 96071 141229
11500 17947 29424 42022 65227 82306 99225 145865
11865 18517 30359 43357 67301 84922 102379 150502
12231 19088 31295 44693 69374 87538 105533 155138
12596 19658 32230 46029 71447 90155 108687 159774
12962 20229 33165 47364 73521 92771
13327 20799 34101 48700 75594 95387
13693 21370 35036 50036 77667 98003
14058 21940 35971 51372 79741
†Capacities below 2.0 bar set pressure are calculated at 0.2 bar overpressure.
*Not valid below 2.0 bar set pressure.
56
Please refer to Warranty and Warnings on page 63.
Q
7129
401
2007
5606
5843
6054
6254
6449
6638
6827
7009
7192
7374
7557
7739
7922
8104
11754
15744
19759
23775
27790
31805
35820
39835
43850
47865
51880
55895
59910
63926
67941
71956
75971
79986
84001
92031
100061
108092
116122
124152
132182
140212
148243
156273
164303
R
10323
581
2906
T
16774
944
4723
9338
9611
9885
10149
10414
10678
10942
11206
11471
11735
17020
22798
28611
34425
40239
46052
51866
57680
63494
69307
75121
80935
86748
92562
98376
104190
110003
115817
121631
15174
15618
16063
16493
16922
17352
17781
18211
18640
19069
27658
37046
46494
55941
65388
74835
84283
93730
103177
112625
122072
131519
140966
150414
159861
169308
178756
188203
197650
Set
T2
Pressure
17981
(kPag)
1012 10 kPa incr.
5063 50 kPa incr.
35
40
45
50
16267
55
16743
60
17220
65
17680
70
18141
75
18601
80
19061
85
19522
90
19982
95
20442
100
29649
200
39714
300
49841
400
59969
500
70096
600
80224
700
90351
800
100479
900
110606
1000
120734
1100
130861
1200
140989
1300
151116
1400
161244
1500
171371
1600
181499
1700
191626
1800
201754
1900
211881
2000
2200
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
4400
4600
4800
5000
5200
5400
5600
5800
6000
6200
6400
6600
6800
7000
7200
7400
7600
Saturated Steam Capacities
Unfired Pressure Vessel Service
Styles JOS and JBS
Set Pressures
78-200 barg
Set
Pressure
(barg)
0.1 bar incr.
0.5 bar incr.
78
80
82
84
86
88
90
92
94
96
98
100
102
104
106
108
110
112
114
116
118
120
122
124
126
128
130
132
134
136
138
140
142
144
146
148
150
152
154
156
158
160
162
164
166
168
170
172
174
176
178
180
182
184
186
188
190
192
196
200
D
71.0
3.9
19.9
3154
3234
3314
3394
3474
3554
3634
3714
3780
3866
3953
4040
4127
4215
4304
4393
4482
4572
4663
4754
4846
4938
5031
5124
5218
5313
5409
5505
5602
5700
5799
5898
5999
6100
6202
6306
6410
6516
6622
6730
6839
6950
7062
7175
7290
7406
7525
7644
7766
7890
8016
8143
8274
8406
8541
8679
8820
8964
9262
9574
Capacities certified by the National Board of
Boiler and Pressure Vessel Inspectors and
in accordance with the ASME Boiler and
Pressure Vessel Code, Section VIII.
METRIC UNITS
E
126
7.1
35.6
5620
5763
5905
6047
6190
6332
6475
6617
6736
6889
7044
7199
7355
7512
7669
7828
7987
8147
8309
8471
8634
8799
8964
9131
9298
9467
9638
9809
9982
10157
10332
10510
10689
10869
11052
11236
11422
11610
11800
11992
12187
12384
12583
12785
12990
13197
13408
13621
13838
14059
14283
14511
14743
14979
15220
15465
15716
15973
16503
17059
F
198
11.1
55.7
8803
9026
9249
9473
9696
9919
10142
10365
10550
10791
11033
11276
11520
11766
12013
12261
12511
12762
13015
13269
13524
13782
14041
14302
14565
14829
15096
15365
15636
15909
16184
16462
16742
17025
17311
17599
17891
18186
18483
18784
19089
19397
19710
20026
20346
20671
21001
21336
21675
22021
22372
22728
23092
23462
23839
24224
24617
25018
25849
26721
Capacity in kilograms per
hour of steam at 10% overpressure. Valve discharging to
atmospheric pressure.
ORIFICE LETTER DESIGNATION AND EFFECTIVE AREA, sq. mm.
G
H
J
K
L
M
N
P
325
506
830
1186
1841
2323
2800
4116
18.2
28.5
46.7
66.7
103
130
157
231
91.3
142
233
333
518
654
788
1159
14424 22511 36906 52707 81814
14789 23081 37842 54043 83887
15155 23652 38777 55379 85961
15520 24222 39712 56714 88034
15886 24793 40647 58050 90107
16252 25363 41583 59386 92181
16617 25934 42518 60721 94254
16983 26504 43453 62057 96327
17286 26978 44230 63167 98050
17681 27593 45240 64608 100287
18077 28212 46254 66056 102535
18475 28834 47273 67512 104794
18876 29458 48297 68975 107065
19278 30086 49327 70445
19683 30718 50362 71923
20089 31353 51402 73410
20498 31991 52449 74904
20910 32633 53502 76408
21324 33279 54561 77920
21740 33929 55626 79442
22159 34583 56698 80973
22581 35241 57778 82514
23006 35904 58864 84065
23433 36571 59958 85628
23864 37243 61059 87201
24297 37919 62169 88785
24734 38601 63287 90382
25175 39289 64414 91991
25618 39981 65549
26066 40680 66694
26517 41384 67849
26972 42094 69013
27432 42811 70189
27895 43535 71375
28363 44265 72572
28836 45003 73782
29314 45748 75004
29796 46501 76239
30284 47263 77487
30777 48033 78749
31277 48812 80027
31782 49600 81319
32293 50399 82628
32812 51207 83954
33337 52027 85298
33869 52858 86660
34409 53701
34957
35514
36080
36655
37239
37835
38441
39059
39690
40334
40991
42352
43781
Q
7129
401
2007
R
10323
581
2906
T
16774
944
4723
Please refer to Warranty and Warnings on page 63.
Set
T2
Pressure
17981
(kPag)
1012 10 kPa incr.
5063 50 kPa incr.
7800
8000
8200
8400
8600
8800
9000
9200
9400
9600
9800
10000
10200
10400
10600
10800
11000
11200
11400
11600
11800
12000
12200
12400
12600
12800
13000
13200
13400
13600
13800
14000
14200
14400
14600
14800
15000
15200
15400
15600
15800
16000
16200
16400
16600
16800
17000
17200
17400
17600
17800
18000
18200
18400
18600
18800
19000
19200
19600
20000
57
Pressure Relief Valves Custom Designed by Crosby Engineering
Crosby can design and manufacture pressure relief valves to meet
your unique requirements.
Application:
♦ Emergency depressurizing system for overpressure protection and protection in the
event of a fire or runaway exothermic reaction.
Solution:
♦ Crosby® Style JBS pressure relief valve with special axial pneumatic actuator custom
designed by Crosby Engineering.
♦ Standard direct operating pressure relief valve which can also be opened pneumatically.
♦ Pneumatic operation as a result of remote sensing of pressure, temperature or other
process variables.
♦ Direct in line loading of valve spindle without the use of levers or cams.
♦ Full lift of valve disc with zero pressure at the inlet port.
♦ Remote valve lift indication.
To find out more about this unique pressure relief valve with special axial pneumatic actuator, or for information
about how Crosby can provide you with a special valve designed to meet your needs, contact the Crosby Factory
or your local Crosby Representative.
Crosby Block Body Pressure Relief Valves
With today’s process systems requiring greater and larger
throughputs at ever increasing pressure, Crosby’s Block Body
Pressure Relief Valves provide the solution to applications involving
very high set and back pressures that exceed standard ranges.
One single Crosby Block Body Pressure Relief Valve installation can
handle the capacity of multiple API-526 standard valves with:
♦
♦
♦
♦
Fewer potential leak paths
Less down time and maintenance
Fewer spare parts required
Cost savings on inlet and outlet piping
Design Details:
♦
♦
♦
♦
♦
♦
♦
Full nozzle design for maximum tightness
Geometrically designed valve block body and bonnet for weight savings
Dissimilar materials are used for guiding surfaces to eliminate galling
Interference fitted inlet studs provided
Available in orifice sizes from “D” through “T2”
Materials of construction available for special process applications
Available in Crosby Styles JOS, JBS and JLT valve designs
For more information, contact the Factory or your local Crosby Representative.
58
Please refer to Warranty and Warnings on page 63.
Crosby Styles JBS and JLT-JBS balanced bellows valves
with supplementary back pressure balancing piston
Styles JBS-BP and JLT-JBS-BP are a modification to the Crosby bellows pressure
relief valve designed and tested in collaboration with engineers of one of the world's
leading petroleum companies. This adaptation provides additional assurance of safe
performance in the event of bellows failure on installations having discharge manifold
systems where back pressures (constant or variable) are present.
The Crosby bellows pressure relief valve (Styles JBS and JLT-JBS) was especially
developed for service under back pressure conditions. The balanced area bellows
counteracts back pressure effects. However, in case of a broken or ruptured bellows,
the valve would perform in the manner of a standard valve without bellows. Introduction of the Supplementary Back Pressure Balancing Piston guarantees full performance characteristics of the valve until necessary replacement of the bellows can be
made. This design, illustrated at the left, thus affords double protection.
5B
Unless compensated for, the effects of back pressure may cause (1) a change in the
opening pressure, (2) a decrease in valve capacity, and (3) valve performance to
become unstable at higher back pressure. Use of the bellows valve with supplementary balancing piston maintains the balancing effect even after bellows failure and in
such event would allow the valve to function in essentially the same manner as with
the bellows intact. However, the bonnet of the valve must be vented in order to insure
proper functioning of the valve. The vent also serves for a tell-tale in case of a ruptured
or broken bellows.
17
Styles JBS-BP
and JLT-JBS-BP
Design
The auxiliary balancing piston is incorporated in the basic bellows valve, modified
to include the piston (5B) and the cylinder (17) which is part of the disc holder. The
guiding clearances are held to a minimum and, in addition, grooves in the piston
form a labyrinth seal to reduce flow between the piston and cylinder. Thus, in the
event of a bellows failure, the leakage of fluid to atmosphere is kept to a minimum.
Flanges and Flange Facing
Dimensions of flanges conform to current ANSI standards. On full
nozzle valve inlets, however, the thicknesses are greater than the
minimum required by ANSI standards. Dimension X shown at right
should be used to determine bolt length. Dimension X remains the
same for raised face or ring joint flanges and is found on pages 14
through 42.
All flange facings are spiral serrated finish or concentric serrated
finish. Optional finishes are available. Drilling of inlet and outlet
flange holes straddle the valve center line. Inlet and outlet flanges
are spot faced on back for stud nuts. Center-to-face dimensions are
subject to tolerance of ± 1/16" (1.5mm) for valves through 4" inlet
size and ± 1/8" (3.17mm) for valves with inlet size larger than 4".
In addition to standard raised face or ring joint flanges, tongue and
groove or other flange facings are available as options.
Please refer to Warranty and Warnings on page 63.
59
Crosby JBS and JLT-JBS Balanced Bellows Pressure Relief Valves
for Sour Gas Service per NACE MR0175
Level 1 - For applications where compliance with NACE MR0175 is required for wetted parts in
the primary (upstream) pressure zone of the pressure relief valve.
Level 2 - For applications where compliance with NACE MR0175 is required for wetted parts in
the primary (upstream) and secondary (downstream) pressure zones of the pressure
relief valve.
The stainless steel or Inconel bellows isolates the valve spring and other critical components above
it from the process fluid.
While the materials recommended for the Crosby Style JBS and JLT-JBS sour gas valves are
suitable for average service conditions, optional materials are available to provide additional
resistance to corrosion beyond the minimum requirements of the standard.
Standard NACE Material
Ref.
No. Part Name
1
Body
2
3
4
5A
5B
5C
6
8
Nozzle
Nozzle Ring
Set Screw
Disc Holder
Bellows Top Flange
Bellows
Disc Insert
Guide
9
10
Spindle
Spring
11
12
Spring Washer
Bonnet
13
14
15
16
20
21
22
23
24
25
Bonnet Stud
Bonnet Nut
Adjusting Bolt
Adj. Bolt Nut
Set Screw Gasket
Guide Gasket
Seal & Wire
Seal Clip
Type J Cap
Cap Gasket
Level 1
Carbon Steel
Level 2
Carbon Steel
SA-216 Gr. WCB
SA-216 Gr. WCB
316 St.St.
316 St.St.
416 St.St.
316L St.St.
316L St.St.
316L St.St.
316 St.St.
St.St.
ASTM A 297 Gr. HE
416 St.St.
Carbon Steel
Steel
Carbon Steel
316 St.St.
316 St.St.
316 St.St.
316L St.St.
Inconel (Note 2)
Inconel
316 St.St.
St.St.
ASTM A 297 Gr. HE
416 St.St.
Carbon Steel
Aluminum Metallized
Steel
Carbon Steel
SA-216 Gr. WCB
SA-216 Gr. WCB
Alloy Steel
Steel
416 St.St.
Steel
*
*
Lead & St.St.
St.St.
Steel
*
Note 1
Note 1
416 St.St.
Steel
*
*
Lead & St.St.
St.St.
Steel
*
Note: This vent
must remain
open on JBS
construction
5B
5C
5A
Style JBS
(with bellows)
Note: Shaded materials indicate variation from standard.
*Organic Fiber Non-Asbestos
Note 1 - Standard bolting material is furnished for NACE MR0175 Class III applications where bolting is not directly
exposed to sour environments and is not buried, insulated, equipped with flange protectors, or otherwise
denied direct atmospheric exposure. If Class I or II bolting is required, bolts will be ASME A193 Grade
B7M HRC-22 maximum and nuts will be ASME A194 Class 2HM HRC-22 maximum.
Note 2 - Top flange on D and E orifice bellows is 316 stainless steel.
60
Please refer to Warranty and Warnings on page 63.
Crosby JOS and JLT-JOS Pressure Relief Valves
for Sour Gas Service per NACE MR0175
Level 1 - For applications where compliance with NACE MR0175 is required for wetted parts in
the primary (upstream) pressure zone of the pressure relief valve.
Level 2 - For applications where compliance with NACE MR0175 is required for wetted parts in
the primary (upstream) and secondary (downstream) pressure zones of the pressure
relief valve.
While the materials recommended for the Crosby Style JOS and JLT-JOS sour gas valves are
suitable for average service conditions, optional materials are available to provide additional
resistance to corrosion beyond the minimum requirements of the standard.
Standard NACE Material
23 22
24
Ref.
No. Part Name
1 Body
25
15
16
2
3
4
5
6
8
11
12
10
Nozzle
Nozzle Ring
Set Screw
Disc Holder
Disc Insert
Guide
9
13
11
14
21
8
6
20
5
4
3
22
1
2
Style JOS
9
10
11
12
Spindle
Spring
Spring Washer
Bonnet
13
14
15
16
20
21
22
23
24
25
Bonnet Stud
Bonnet Nut
Adjusting Bolt
Adj. Bolt Nut
Set Screw Gasket
Guide Gasket
Seal & Wire
Seal Clip
Type J Cap
Cap Gasket
Level 1
Carbon Steel
Level 2
Carbon Steel
SA-216 Gr. WCB
SA-216 Gr. WCB
316 St.St.
316 St.St.
416 St.St.
316L St.St.
316 St.St.
St.St.
ASTM A 297 Gr. HE
416 St.St.
Carbon Steel
Steel
Carbon Steel
316 St.St.
316 St.St.
316 St.St.
316L St.St.
316 St.St.
St.St.
ASTM A 297 Gr. HE
316 St.St.
Inconel X750
316 St.St.
Carbon Steel
SA-216 Gr. WCB
SA-216 Gr. WCB
Alloy Steel
Steel
416 St.St.
Steel
*
*
Lead & St.St.
St.St.
Steel
*
Note 1
Note 1
316 St.St.
316 St.St.
*
*
Lead & St.St.
St.St.
Steel
*
Note: Shaded materials indicate variation from standard.
*Organic Fiber Non-Asbestos
Note 1 - Standard bolting material is furnished for NACE MR0175 Class III applications where bolting is not directly
exposed to sour environments and is not buried, insulated, equipped with flange protectors, or otherwise
denied direct atmospheric exposure. If Class I or II bolting is required, bolts will be ASME A193 Grade B7M
HRC-22 maximum and nuts will be ASME A194 Class 2HM HRC-22 maximum.
Please refer to Warranty and Warnings on page 63.
61
Pressure Relief Valve Seat Tightness
Metal-to-Metal Seats and Soft Seats
As system pressure approaches the valve set pressure, the differential force
tending to hold the seats in contact is diminished. Consequently, to obtain an
acceptable degree of tightness capability, the valve must be designed and
built with a high level of quality.
Tightness Standard
The leakage rate in bubbles per minute shall not exceed the values indicated in
Table I below. For soft seated valves there shall be no leakage for one minute
(zero bubbles for one minute).
Crosby pressure relief valves are carefully engineered and manufactured to
provide those features essential for good valve performance and continuous
long term protection. The inherent high degree of seat tightness found in
Crosby pressure relief valves is possible due to the following design features:
1. Positive alignment of the seats through generous guiding and ball joints.
2. Minimum distortion as a result of full nozzle construction and thermally
balanced disc design.
3. Excellent flatness and surface finish of the seating surfaces by precision
machining and custom lapping.
Cleanliness of the system and proper installation of the valve are also
essential for good seat tightness.
Definition
Ambiguous terms such as "bubble tight," "drop tight," "zero leakage" and
"commercial tightness" have been used in the past. Since these terms were
used without uniform definition, they lacked true practical meaning.
Now with the adoption of a standard that defines the terminology used to
describe pressure relief devices (ASME Performance Test Code PTC25.3), and the adoption of a standard describing a method of determining seat
tightness of relief valves (API Standard 527), there should exist a degree of
uniformity throughout the industry.
"Commercial" Seat Tightness Standard
(API Standard 527)
The following API Standard of "commercial" tightness has been adopted by
industry and users in order to clarify testing methods and tightness standards
for the sake of uniformity. It applies to pressure relief valves.
The API Standard is as follows:
Scope:
This standard describes a method of determining seat tightness of pressure
relief valves as covered in API Standard 527 Seat Tightness of Pressure
Relief Valves. The maximum acceptable leakage rates are defined for
commercial pressure relief valves with metal-to-metal and soft seats for set
pressures up to 6000 psig (414 barg). If greater tightness is required, it can
be supplied but must be specified on the purchase order or inquiry. See page
9 for Crosby soft seat pressure-temperature limits.
Test Apparatus
A typical test arrangement for determining seat tightness for pressure relief
valves is shown in Fig.1. Leakage measurement shall be made with use of
a 5/16 in. (7.93 mm) OD tubing with 0.035 in. (.88 mm) wall. The tube end shall
be cut square and smooth. It shall be parallel to and 1/2 in. (127 mm) below
the surface of the water. A clamp type seat leak apparatus is available from
Crosby. Contact the factory.
Table I
Set
Pressure
psig
(barg)
15-1000
(1.03-68.9)
1500(103.4)
2000(137.9)
2500(172.4)
3000(206.8)
4000(275.8)
5000(344.8)
6000(413.7)
Effective Orifice Sizes
0.307 in.2 and Smaller
Max.
Approximate
Bubbles
Leakage Rate
Per
Per 24 Hours
Minute Standard Standard
Cubic
Cubic
Feet
Meters
40
0.60
0.017
60
80
100
100
100
100
100
0.90
1.20
1.50
1.50
1.50
1.50
1.50
0.026
0.034
0.043
0.043
0.043
0.043
0.043
Effective Orifice Sizes
Larger Than 0.307 in.2
Max.
Approximate
Bubbles
Leakage Rate
Per
Per 24 Hours
Minute Standard Standard
Cubic
Cubic
Feet
Meters
20
0.30
0.0085
30
40
50
60
80
100
100
Crosby Seat Tightness Standard Water Service Valves (Style JLT)
Crosby pressure relief valves are checked for seat tightness by a quantitative
seat leakage test. All of the test fluid passing through an assembled valve
is collected and measured under the following test conditions:
1. The inlet pressure is adjusted to a test pressure which is 90% of the "Cold
Differential Test Pressure." Valves set below 50 psig (3.44 barg) are
tested at 5 psig (.34 barg) below the cold differential test pressure.
2. The seat leak pressure is maintained for a period of not less than ten
minutes.
Allowable Leak Rate
The maximum allowable leakage rate should not exceed 10 cubic centimeters
per hour per inch of diameter of nominal valve inlet size. For nominal valve
sizes of 1 inch (25.4 mm) or less, the leakage rate shall not exceed 10 cubic
centimeters per hour. For soft seated valves there shall be no leakage for
one minute.
NOTE - THE COVER PLATE
SHOULD BE FITTED WITH A
SUITABLE DEVICE TO RELIEVE BODY PRESSURE IN
CASE OF ACCIDENTAL POPPING OF VALVE.
With the valve mounted vertically, as shown in Fig. 1, the leakage rate in
bubbles per minute shall be determined with pressure at the valve inlet held
at 90 percent of the cold differential test pressure, except for valves set at 50
psig (3.44 barg) or below, in which case the pressure shall be held at 5 psig
(.34 barg) below the cold differential test pressure. The test pressure shall be
applied for a minimum of 1 minute for valves of inlet sizes through 2 in. (50.8
mm); 2 minutes for sizes 2-1/2, 3 and 4 in. (63.5, 76.2 and 101.6 mm); 5
minutes for sizes 6 in. and 8 in. (152.4 and 203.2 mm). Air at approximately
atmospheric temperature shall be used as the pressure medium.
TUBE 5/16" O.D. x 0.035" WALL
(7.93 mm O.D. x .88 mm wall)
COVER PLATE
AIR RECEIVER
Typical Test Arrangement
Figure 1
Please refer to Warranty and Warnings on page 63.
0.013
0.017
0.021
0.026
0.034
0.043
0.043
Maximum Seat Leakage Rate
Metal Seated Pressure Relief Valves
Procedure
62
0.45
0.60
0.75
0.90
1.20
1.50
1.50
Ordering Information
The primary purpose of Style JOS/JBS/JLT pressure relief valves is to
protect lives and property. In order to select the proper valve for your
application, please provide the information listed below. Details of the
process fluid and conditions are especially important. If there is any
doubt as to selection or application of valves or parts, please contact
your local Crosby Sales Office or Representative.
Ordering Information
Quantity
Nominal valve size (inlet x orifice x outlet)
Valve style
Inlet connection rating and facing
Outlet connection rating and facing
Service (liquid, gas or vapor)
Set pressure (psig)
Back pressure (psig) if any, and
whether constant or variable
Maximum service temperature (°F)
Cap or lifting lever type
Valve materials
Seat material
Code requirements
Required capacity
Accumulation (allowable overpressure)
Molecular weight - vapor
Specific gravity - gases and liquids
Viscosity - liquids
Example
5
4xLx6
JOS-45
600 RF
150 RF
Air
800 psig
Atmosphere
Parts
To order parts, the following information should be included:
1. Quantity
2. Part name, i.e., disc insert
3. Size, style and valve number
4. Assembly number (from valve nameplate)
5. Serial number (from valve nameplate)
6. Original purchase order number (if assembly
number has been destroyed).
Sample Nameplate
(Figures shown are for illustrative purposes only.)
Ambient 60F
Type C
Standard
Metal-to-metal
standard
ASME Unfired
Pressure Vessel
Code Section VIII
45433 SCFM
10%
1.0
-
Crosby provides special “fast response” delivery service of
spare parts to satisfy unplanned parts requirements. Fast
response delivery service can be initiated by contacting
your local Crosby representative. Emergency delivery service is available direct from the factory, 24 hours a day, 7
days a week by calling (508) 384-3121.
Springs with Washers
To order springs with washers, in addition to the other
information included for "Parts," the required valve set
pressure must also be specified. If the spring is for a nonbellows valve, and there is a constant back pressure condition, that too should be specified. Also specify spring
material and coating if other than standard.
Replacement Valves
To replace a valve in service, the assembly number, serial
number, set pressure and previous order number should be
specified.
WARRANTY
Crosby Valve & Gage Company, Crosby Valve and Engineering Company, Limited, Crosby Services International Ltd., Crosby Valve Pte. Ltd., Crosby
Valve Ltd. or Crosby Valve Corporation (collectively “Crosby”) hereby warrant, for a period of one year from the date of shipment by Crosby, that its
product or products (“Product”) shall be free from defects in workmanship and material. This Warranty shall extend only to original purchasers of
Product (the “Purchaser”) and shall be exclusive of the effects of corrosion, erosion, normal wear and tear as well as defects due to improper
application, handling, storage, installation or maintenance or where Purchaser has failed to comply with Crosby’s warnings. This Warranty also does
not apply to any repairs, assembly or test work done on the Product by parties other than Crosby. Crosby does not warrant that its Product will perform
in any specific or designated application. The use of replacement parts, components, products or services not manufactured by Crosby may, in the
sole discretion of Crosby, void this Warranty.
Under no circumstances shall Crosby be liable for special, incidental or consequential damages including, but not limited to, claims for economic loss.
Moreover, in no event shall Crosby’s total liability exceed the original purchase price of the Product.
CROSBY MAKES NO OTHER WARRANTY WITH RESPECT TO THE PRODUCT AND PURCHASER ACKNOWLEDGES THAT CROSBY
EXPRESSLY DISCLAIMS ANY WARRANTY OR REPRESENTATION OF ANY KIND, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THE
PERFORMANCE, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE, OR WITH RESPECT TO PATENT OR TRADEMARK
INFRINGEMENT.
Within this one year warranty period, any Product which Purchaser believes to be defective may be returned to Crosby after written notification to
and authorization by Crosby. If Crosby determines that such Product is, in fact, defective, Crosby shall, at its option, either repair or replace the Product
free of charge to the Purchaser. If the Product is not covered by this Warranty, any repair and shipping charges will be the responsibility of the
Purchaser. These remedies are Purchaser’s sole and exclusive remedies.
Should any portion of this Warranty be found to be invalid or unenforceable, such finding shall not affect the other terms of the Warranty which shall
be construed as if such portion had never been contained herein.
WARNING
The Product is a safety related component intended for use in critical applications. The improper application, installation or maintenance of the Product
or the use of parts or components not manufactured by Crosby may result in a failure of the Product. The advice of a qualified engineer should be sought
prior to any use of the Product.
Any installation, maintenance, adjustment, repair or test performed on the Product must be done in accordance with the requirements of all applicable
Codes and Standards.
The information, specifications and technical data (the “Specifications”) contained in this document are subject to change without notice. Crosby does
not warrant that the Specifications are current and assumes no responsibility for the use or misuse thereof. The Purchaser should verify that there have
been no changes to the Specifications prior to use.
WARNING: The information contained in this catalog is for informational purposes only. See also Crosby’s Engineering Handbook and computer program,
CROSBY-SIZE. The actual selection of valve products is dependent upon numerous factors and should be made only after consultation with applicable
Crosby personnel. Crosby assumes no responsibility for the actual selection of such products and hereby expressly disclaims liability for any and all claims
and damages which may result from the use or application of this information or from any consultation with Crosby personnel.
Please refer to Warranty and Warnings on page 63.
63
Crosby Styles JOS, JBS and JLT
®
Catalog No. 310
Effective: April 1995
Corporate Headquarters and Operations Center
P.O. Box 944
Stafford, Texas 77497, USA
Telephone: (281) 274-4400, Fax: (281) 240-1800
Operations Centers
43 Kendrick Street
Wrentham, Massachusetts 02093, USA
Telephone: (508) 384-3121, Fax: (508) 384-8675
Corrie Way, Bredbury Industrial Estate
Stockport, Cheshire SK6 2ST, UK
Telephone: 44-161-494-5363, Fax: 44-161-494-5672
Crosby Road
Market Harborough, Leics LE16 9EE, UK
Telephone: 44-1858-467281, Fax: 44-1858-434728
No. 45, Tuas Avenue 9
Jurong, Singapore
Telephone: 65-861-1655, Fax: 65-861-8310
149 Gul Circle
Singapore 629605
Telephone: 65-862-2177, Fax: 65-862-1778
© 1999 Anderson Greenwood / Crosby
Printed in USA