Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
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VELAN COMPANY PROFILE
Velan is one of the world’s leading manufacturers of industrial steel valves,
supplying gate, globe, check, ball, triple-offset, knife gate valves and highly
engineered severe service valves for critical applications in the chemical,
petrochemical, oil and gas, fossil and nuclear power, cogeneration, pulp
and paper and cryogenic industries. See the back cover of this catalog for a
summary of the many quality products that Velan designs and manufactures.
Founded in 1950, Velan earned a reputation for excellence as a major supplier of
forged valves for nuclear power plants and the U.S. Navy. Velan Inc. pioneered
many designs which became industry standards, including bellows seal valves,
all stainless steel knife gate valves and forged valves up to 24”.
Today, the company has a global network of 13 specialized manufacturing
plants, including five in Canada and the US, four in Europe, and four in Asia.
Velan employs over 1,800 people, 75% of whom are located in North America.
The Original Velan STEAM TRAP
Velan is pleased to announce that we have
reacquired the Velan universal steam trap line
produced for 15 years by Plenty Steam Products.
This comprehensive range of steam traps is
based on a unique design that was developed
and patented by A.K. Velan, CEO of Velan
Inc., and is now copied by major steam trap
manufacturers.
Once again, you can trust Velan to supply
high quality steam traps for virtually all of
your condensate drainage applications.
Contents
Manufacturing plants . ................................................... 3
Principles of operation............................................... 4, 5
How it works................................................................. 6, 7
Forged bimetallic steam traps
Types TS, TSF, and SF............................................... 8-11
Bimetallic steam traps Type SSF ........................ 12, 17
Forged HP/HT steam traps Type N ............... 12, 15-17
Hermetically sealed steam traps
Types Q250 and UST .............................................. 18-20
Velan connectors . ....................................................... 21
High capacity piston operated
steam traps Type SP and SPF .............................. 22-25
Piping King package units...................................... 26-29
Monovalve float bimetallic steam traps
Type MFT and MFTS .............................................. 30-37
Thermodynamic steam traps
Type VTS, HPTD, VTDS, and VTD.......................... 38-41
Compressed air drain traps
Type MFA and MFAS ............................................. 42-43
Strainers......................................................................... 44
Accessories.................................................................... 45
Comparison of principles of operation . .................... 47
Selection - sizing . ......................................................... 48
Steam tables .............................................................49-50
How to order.................................................................. 51
Head Office & PLANT 5
MONTREAL, CANADA 240,000 sq. ft. (22,300 m2)
2 – 60” (50 –1500 mm) dual plate check valves, 3 – 48” (80 –1200 mm) triple-offset valves,
3
⁄ 8 – 2” (10 –50 mm) metal and resilient seated ball valves
Headquartered in Montreal, Velan has several international subsidiaries.
For general inquiries:
For more specific information concerning steam trap inquiries:
Velan head office:
7007 Côte de Liesse,
Montreal, QC H4T 1G2 Canada
Velan Valves ltd.
Unit 1, Pinfold Road
Lakeside Business Park Thurmaston
Leicester LE4 8AS England
Tel: (514) 748-7743
Fax: (514) 748-8635
Check our website for more specific contact information.
www.velan.com
Tel: 44 116 269-5172 Fax: 44 116 269-3695
email: steamtraps@velan.com
www.velansteamtraps.com
NOTE: The material in this catalog is for general information only and shall not be used for specific performance data and material selection without first
consulting Velan. Velan reserves the right to change designs, materials or specifications without notice. Velan does not accept any liability or damages
arising from the use of information in this catalog.
2
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
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VELAN COMPANY PROFILE
• 13 manufacturing facilities • 4 stocking distribution centers
• Hundreds of distributors worldwide • Service shops worldwide
Plant 1
Plant
MONTREAL, CANADA
109,000 sq. ft. (10,126 m2),
1
⁄4 –4” (8 –100 mm) forged gate, globe,
and check valves
Plant 2 and 7
Distribution Center
LYON, FRANCE - Velan S.A.S
160,000 sq. ft. (14,900 m2)
1
⁄4 –42” (8–1,050 mm) forged and cast steel
gate, globe, and butterfly valves
Plant
MONTREAL, CANADA
170,000 sq. ft. (15,800 m2),
2– 60” (50–1500 mm) forged and cast steel
gate, globe, check, ball, knife, and
3– 36” (80–700 mm) butterfly valves
Plant 3
12,000 sq. ft. (1,115 m2)
Plant
Mennecy, France
21,530 sq. ft. (2,000 m2)
nuclear and severe service valves
Plant
WILLISTON, VT, U.S.A. - Velan Valve Corp.
155,000 sq. ft. (14,400 m2)
2–24” (50–600 mm) forged and cast steel
gate, globe, and check valves
WILLICH, GERMANY - Velan GmbH
ANSAN CITY, SOUTH KOREA Plant 1
30,000 sq. ft. (2,800 m2)
components and 2–4” (50–100 mm)
cast steel valves
Plant
LEICESTER, ENGLAND - Velan Valves Ltd
14,000 sq. ft. (1,300 m2)
steam traps and 3⁄8 –2” (10–50 mm)
bonnetless globe valves
ANSAN CITY, SOUTH KOREA Plant 2
65,000 sq. ft. (5,800 m2), 2–12” (50–300 mm)
cast steel gate, globe, check, ball, and
knife gate valves
- VELNORTH 8,000 sq. ft. (743 m2)
Plant 4 and 6
Distribution Center
GRANBY, CANADA
186,500 sq. ft. (17,325 m2),
2 –16” (50–400 mm) cast steel gate, globe,
and check valves,
1
⁄4 –12” (8–300 mm) ball valves
Distribution Center
Plant
Plant
LISBON, PORTUGAL
60,000 sq. ft. (5,600 m2)
2–12” (50–300 mm) cast steel gate,
globe, and check valves
Distribution Center
MARIETTA, GA, U.S.A. - Veleast
BENICIA, CA, U.S.A. - Velcal
6,500 sq. ft. (600 m2)
15,000 sq. ft. (1,400 m2)
taichung, Taiwan - Velan-Valvac
20,000 sq. ft. (1,840 m2)
1
⁄4 –2” (8–50 mm) ball valves
Plant
Suzhou, China - Velan Valve (Suzhou)
Co., Ltd
62,517 sq. ft. (5,808 m2)
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
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principles of operation
●● Bimetal is a composite
metal comprising two
or more metallic layers
with different coefficients
of expansion, which
changes curvature when
subjected to heat.
Temperature
°F (°C)
1050 (565)
Velan steam traps
use a bimetal
of high tensile
strength, stable at
high temperature
with deflection
limited to 600°F
(315°C) to prevent
over-stressing on
super-heated steam
service.
520 (271)
600 (315)
what is bimetal?
Deflection & Pull
The Original “Multi-Segmented” bimetal principle
actuates Velan steam traps
THE CLOSING FORCE OF THE BIMETALLIC ELEMENTs
Follows the SATURATED STEAM curve
350
60
300
250
A1
50
25
20
250
200
156
40
35
134
30
100
15
200
C
20
1
A
C
150
B
10
100
Single element
Multielement
5
50
0
0
0
200 212 250 287 300
100
1
350
400
142 150
Steam Temperature
2
3
200
4
440
225
0
bar
10
psi
50
Steam Pressure
Chart 1 illustrates the truly universal operating
principle behind the Velan steam trap. Each
segment acts consecutively, covering the
complete operating pressure range without
adjustment or orifice change. With a single
element the temperature differential to open
the steam trap would be BC1 (66°F/37°C)
instead of BC (8°F/4.4°C) and the required
closing force would be BA1 (20 lb/90 N) instead
of BA (5 lb/22 N).
70
lb
A non-segmented bimetallic element would
have a straight-line characteristic and the
trap would only react to large temperature
differentials, whereas the Velan segmented
element automatically compensates for any
pressure condition within its range, and
maintains the sensitivity to release condensate
at below steam temperature without loss of
steam.
300
N
To close the valve on steam the bimetallic
element must develop a pull of at least 35 lb
(156 N) with three segments. The patented
Velan multi-segment design was developed so
that the thermal pull of the bimetal element
would closely follow the saturated steam
curve and use only the portion of the element
required to overcome the opening force at
saturated steam temperature.
Chart 1 Operating principle of Velan steam traps
Pull of Bimetal
The force of line pressure acting on the valve
ball holds it open when condensate or air is
in the trap. Line pressure, valve and orifice
diameter determine this force. For a 1/2” (12.7
mm) orifice at 150 psi (10.3 bar) line pressure
develops a force of 30 lb (134 N).
1. Free deflection up to 212°F (100°C)
2. One segment pulling 0-40 psi (0-2.8 bar) up to 287°F (142°C)
3. Two segments pulling 40-120 psi (2.28-8.3 bar) up to 350°F (177°C)
4. Three segments pulling 120-350 psi (8.3-24 bar) up to 440°F (227°C)
4
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 4
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principles of operation
The Velan patented bimetal principle
as applied to meet various requirements
See page 4 for more details.
10
200
40
200
150
30
Element 1, 2 & 3
100
20
Element 1 & 22
5
50
0
50
Element 1
0
18
150
50
200
250
300
100
150
Steam Temperature
350
100
10
50
0
0
Element
Closing
Forces
Steam
Pressure
65 100
150
N
15
250
–1
–2
–3
250
lb
closing force developed at saturated
temperature in relation to the line
pressure tending to open the valve.
The gradual increase in force,
following the steam curve, is a
function of the patented segmentation
principle of the element. The delicate
balance of opening and closing forces
exists in all pressure ranges such as
0-200, 0-350, 0-600, 0-1500, 500-2500,
500-2600, 500-4500 psi (0-14, 0-21,
0-41, 0-103, 35-172, 35-179, 35-310
bar), and produces complete universal
operation throughout the pressure
range without orifice change.
60
300
St Satu
ea ra
m te
Cu d
rv
e
●● Chart 2 illustrates the bimetal
20
bar
psi
universal steam trap
principle
400
200
Chart 2 The patented multi-element principle.
float bimetallic principle
200
combination of a bimetal and float
element utilized in the float/bimetallic
series. In this principle, the bimetal is
used to close the valve at saturated
temperature or release cool air in the
system. However a small accumulation
of condensate in the trap body lifts the
float and opens the discharge valve.
No temperature depression is required
for this process and, as a result,
the characteristic is identical to the
saturated steam curve. The steam trap
shuts off in the presence of steam
and opens at once in the presence of
condensate even at saturated steam
temperature.
15
See page 7 for more details.
Steam
Pressure
40
200
150
30
10
20
10
65 100
18
200
50
300
100
150
Steam Temperature
400
50
0
0
0
bar
psi
0
St Satu
ea ra
m te
Cu d
rv
e
5
100
N
100
lb
●● Chart 3 illustrates the operation of the
Element
Closing
Forces
200
Chart 3 The patented multi-element principle combined with a float.
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
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hOw It wORks
thE 4 PuRPOsE VALVE ANd Its FuNCtION
IN thE VELAN uNIVERsAL BIMEtALLIC stEAM tRAP
FAST wARM Up
pOSITIvE TRAppING
The discharge valve is open, allowing air and cold water
to be discharged rapidly. The period of waiting to start a
process is reduced to minutes – there is no air binding,
water-logging or steam
locking to delay equipment
warm up.
Incoming steam causes the bimetal to deflect.
This thermal pull of the bimetal element acts on the
valve stem overcoming the steam pressure closing the
valve. The ball valve is
pulled tightly on to its seat
preventing weeping and
loss of live steam.
The thermal pull increases
or decreases as a function
of temperature, in the same
relation as the temperature
and pressure of the
saturated steam.
The same element can be
used for varying steam
pressures within wide
pressure ranges.
Actual tests show that up to
21/2 hours may be saved on
each “warm-up” because
Velan steam traps have
a much greater venting
capacity than other traps,
due to large orifice.
TRAPPING
DRAINING
I STEP
II STEP
Acting valve
area
Thermal
pull
Closing force
Unbalanced pressure
Pressure
action
on full
valve area
Opening force
Pressure
action
on orifice
Differential
pressure
Pressure
balanced
valve closed
Pressure opens
valve completely
acting on full
valve area
Pressure cracks
Vvalve and
releases flow
TwO STEp DRAINAGE
CHECk vALvE ACTION
When steam condenses into water, the thermal pull of the
bimetal is gradually reduced until the line pressure on the
valve releases it from the valve seat and allows condensate to be discharged.
This is the first step in the
smooth and quick opening
of the valve, without noise
or violent action. When
the flow is released, the
unbalanced pressure acts
on the full valve area.
The force to overcome the
thermal pull increases and
opens the orifice to full
capacity.
Back pressure in the discharge pipe, a sudden drop in
steam pressure a rapid fluctuation or discharging to
overhead lines causes back flow of condensate.
To prevent this possible back flow or condensate entering
the equipment not in
service, separate check
valves have to be installed
as near to the trap as
possible. In Velan steam
traps the discharge valve
in the trap acts as a check
valve providing full back
flow control.
6
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 6
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hOw It wORks
thE 4 PuRPOsE VALVE ANd Its FuNCtION IN thE VELAN PIstON
OPERAtEd & thE MONOVALVE FLOAt BIMEtALLIC stEAM tRAP
PIstON OPERAtEd
MONOVALVE FLOAt BIMEtALLIC
FAST wARM Up
Cool air and condensate from the system is discharged
through the large main valve orifice actuated by the piston,
which is held open by it’s
Pilot Valve
own weight when cold.
As line pressure builds up
pressure above the piston
keeps the valve open at
maximum discharge until
the system is completely
purged of air and
condensate.
Clearing air and moisture from a cold system rapidly
reduces warm-up time and increases production. Other
float traps must have
a separate air venting
facility while the Velan
MFT utilizes the large
main orifice for the
fastest warm-up time of
any comparable sized
float trap.
Piston Main Valve
pOSITIvE TRAppING
When condensate is
discharged, the float
mechanism rests on the trap
body. The bimetal element
alone, closes the valve with
thermal power developed
by incoming steam. The
bimetal element is a function
of the saturated steam curve,
therefore operates efficiently
at any pressure
within it’s range.
Incoming steam
contacting the bimetal
element closes the
pilot valve, thereby
reducing the pressure
acting on the piston.
Line pressure below
the main valve closes it
tightly but smoothly, due
to the partial pressure
remaining in the piston
chamber.
CONDENSATE DISCHARGE
When condensate and air collect in the trap body, the
bimetal force is reduced,
line pressure opens the
pilot valve, pressurizing
the piston chamber
and forcing the main
valve open against line
pressure by virtue of the
greater piston area.
If condensate builds up in the trap body, the float becomes
buoyant, and opens the
valve to unrestricted
flow. Condensate even
at steam temperature is
discharged at the same
rate as it reaches the trap.
No air binding or water
logging irrespective of
adverse conditions. The
trap drains by gravity and
will not freeze.
CHECk vALvE ACTION
Excess back pressure, a drop in line pressure, or discharging
to overhead return lines,
can cause a reverse flow
of condensate through the
trap. Normally separate
check valves are required
to prevent this occurrence.
The Velan type SP main
discharge valve also works
as a temporary piston
check valve and prevents
back flow.
When pressure is off, equipment discharging to a
common return, or
where condensate is
returned to overhead
lines, a check valve is
required to prevent
reverse flow through the
trap. The free-floating
MFT mechanism shuts
immediately the reverse
flow and no additional
device is required.
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 7
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VELAN forged bimetallic cage Unit steam traps
Cage unit on type ts, tsf & sf
Cage Unit
The advanced cage unit design
in Velan steam traps combines
a bimetal element, hardened
Rc 58 min. ball valve and a
Stellited seat area all in one
factory-tested assembly.
SERVICE:
2 MINUTES
TO
REPLACE
CAGE UNIT
Replacement of all wearing parts
can be achieved in less than two
minutes, with the trap remaining
in-line.
ts, tsf & sf Design Features
●● Forged valve body and cover
offer the advantages of high strength, structural integrity
and reliability that make it an ideal choice for steam
service.
●● Stainless steel trim
●● Stellited seats
All Velan valve seats are Stellite
faced to increase their resistance
to the high degree of wear through
velocity of flow, dirt and scale.
●● Integral strainer (F)
Stainless steel screens are integral in all three models
to protect the trap operating mechanism from damage
by dirt or scale. No extra fittings or installation costs are
required. Free strainer area minimum 5 to 1. Perforation
is 0.031” (0.8 mm).
●● Unique operation
The individual segments of the bimetallic element act
consecutively, developing forces in close relation to the
saturated steam curve. This permits sensitive, efficient
trap operation at all pressures from 1 psi to maximum,
without orifice change.
●● Silent operation – no violent line shocks.
●● Positive closing
Every Velan steam trap closes tightly on saturated steam
temperature. Positive closing for long periods on dry
superheated steam has enormous advantages in power
plant and marine service.
●● All-position operation simplifies piping layout.
8
●● Freezeproof
Velan traps do not
require a reservoir of
priming water in the
body to operate. When
installed vertically with
inlet on top, they drain
completely when cold,
and are freezeproof
without insulation.
●● Positive condensate
drainage
for process work.
●● Optional temperature
controller on SF
An ingenious device that
allows adjustment of factory
setting under full steam
pressure. Condensate
discharge temperature can
be increased or decreased to
meet the specific requirements
of any process application. Up
to 30% of energy can be saved
by extracting the sensible heat
of steam.
●● Other options include:
NPT blow down plug,
(Strainer blowdown valve)
Piping King Units complete
with valving.
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
VELAN FORgEd ts stEAM tRAPs
E
C
C
pART
I
D
K
H
Type TS
L
F
G
AppLICATIONS
STANDARD MATERIALS
B
A
Body
B
C
D
E
F
G
H
I
J
k
L
Cover
Bimetal element
Cover gasket
Cover bolt
Strainer
Stem and ball
Cage unit gasket
Self-lock adjusting nut
Fixing screw
Bimetal holder (1)
Plug 3/8 NPT
Steam tracing or
instrument cabinet
service etc.
MATERIALS
Forged carbon steel A 105
(C. Max. 0.25)
Same as body material
Truflex GB-14
S/S 316 core with graphite seal
Chrome moly.alloy B7
Stainless steel
SS, ball valve 58 Rc min.
S/S 316 core with graphite seal
Stainless steel
Stainless steel
Stainless steel
Carbon steel
CONNECTIONS
●● Screwed
●● Socketweld
●● Buttweld
●● Flanged
(1) Seat hardfaced Stellite 6.
A
ENGINEERING DATA
PreSSUre
range(2)
psi/bar
0-120
(0-8)
120-250
(8-17)
250-300
(17-21)
PMO
MaX
TeMP
MaTerial
psi/bar
OriFiCe
in/mm
˚F/˚C
MaX
CaPaCiTy
lb/hr/kg/hr
3/8
120
(8)
250
(17)
300
(21)
1,650
750
1,500
682
1,700
773
9.5
5/16
850(1)
454
A105
8
5/16
8
Maximum body design condition:
ANSI/ASME 300 (A105)
PMA = Maximum allowable pressure:
740psi.g @ 100°F (51bar.g @ 38°C)
TMA = Maximum allowable temperature: 800°F (425°C)
Maximum cold hydrostatic test pressure: 1125psi.g (77bar.g)
PMO = Maximum operating pressure:
(see Table)
TMO = Maximum operating temperature = TMA
(1) Permissible, but not recommended for prolonged use above 800˚F (426˚C).
(2) Pressure range indicated in the above table is the preferred operating range,
however the trap is functional from 0psi to its maximum operating pressure.
DIMENSIONS & wEIGHTS
Clearance for Strainer Removal:
TS 4 1/8 in (105 mm) min.
a
FaCe TO FaCe
SCR/SW
BW
Flg
B
CenTer TO
BOTTOM
4
102
4
102
10
254
10
254
6
152
6
152
1 1/2
38
1 3/4
44
Size
in/mm
C
3/8 1/2 3/4
10 15 20
1
25
B
A
A
Differential Pressure bar.g
.069
0.69
3.5 6 10
SCR/SW
BW
Flg
3
76
3 1/4
83
6
2.7
6.5
3
8
3.6
9
4
10
4.5
13
6
lb/kg
The performance graph indicates the continuous
discharge capacities of condensate per hour at
various pressure differentials across the trap.
COnDenSaTe CaPaCiTy
.035
WeighT
C
CenTer
TO TOP
21
42
2000
1000
PReSSuRe / TemPeRaTuRe LimiTS
850
100
45
0.1
0.5
1
5
10
50
27
100
Differential Pressure psi.g
Maximum cold water capacity x 3.5
600
27.6
34.5
41.4
48.3
Not recommended for
prolonged use above 800°F
800
55.2
454
427
Not recommended for
use in this region
700
600
371
316
SUPERHEATED STEAM
500
260
400
300
Steam saturation curve
Trap shell
Pressure/temperature
curve
204
149
200
93
100
60
20.7
0
0
100
200
TS 300
100
200
Pressure bar.g
13.8
TS 250
00
S3
0/T
25
TS
200
6.9
TS 120
0
12
TS
Temperature °F
500
Capacity kg/hr
Capacity lb/hr
300
0
300
38
400
500
Pressure psi.g
600
700
800
0
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 9
Temperature °C
500
400
1000
9
9/1/09 4:34:43 PM
VELAN FORGED TSF STEAM TRAPS
E
J
C
I
APPLICATIONS
STANDARD MATERIALS
PART
B
A
D
B
C
D
K
E
F
G
H
H
Type TSF
L
F
G
I
J
K
L
A
MATERIALS
Forged carbon steel A 105
Body
(C. Max. 0.25)
Cover
Same as body material
Bimetal element
Truflex GB-14
S/S 321 spiral wound
Cover gasket
with graphite filler
Cover bolt
Chrome moly.alloy
Strainer
Stainless steel
Stem and ball
SS, ball valve 58 Rc min.
S/S 321 spiral wound
Cage unit gasket
with graphite filler
Self-lock adjusting nut Stainless steel
Fixing screw
Stainless steel
Stainless steel
Bimetal holder (1)
Plug 3/8 NPT
Carbon steel
Storage tank heating,
sterilizers, cookers, dry
kilns, water heaters,
greenhouse coils, fuel oil
heaters, drip legs, drum
dryers, platen presses,
tire moulds, steam
tracing or instrument
cabinet service etc.
CONNECTIONS
●
●
●
●
(1) Seat hardfaced Stellite 6.
Screwed
Socketweld
Buttweld
Flanged
ENGINEERING DATA
0-200
(0-14)
200-485
(14-33.5)
200
(14)
485
(33.5)
MAX
TEMP
MATERIAL
in/mm
˚F/˚C
lb/hr/kg/hr
3/8
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure:
A
FACE TO FACE
SIZE
in/mm
B
SCR/SW
4 3/8
111
1/2 3/4
15 20
A
BW
10 3/8
264
Differential Pressure bar
.035 .069
0.69
3.5
6 10
21
FLG
10 3/8
264
B
CENTER TO
BOTTOM
C
CENTER
TO TOP
1
25
3 1/2
89
42
850
400
200
85
F4
100
200
Temperature °F
300
F
1
5
10
50
Differential Pressure psi
Maximum cold water capacity x 3.5
27
100
600
27.6
41.4
55.2
454
316
260
500
204
400
0
69
427
SUPERHEATED STEAM
600
Trap shell
Pressure/temperature
curve
Steam saturation
curve
TSF 200
100
0.5
FLG
14
6.4
Not recommended for
371
use in this region
45
0.1
BW
9
4
Not recommended for
prolonged use above 800°F
200
100
10
13.8
300
60
SCR/SW
8
3.6
700
Capacity kg/hr
0
20
0
800
500
1000
TS
lb/kg
Pressure bar.g
1000
2000
TS
WEIGHT
PRESSURE / TEMPERATURE LIMITS
1350
3000
500
(See Table)
The performance graph indicates the continuous discharge capacities of
condensate per hour at various pressure differentials across the trap.
CONDENSATE CAPACITY
Capacity lb/hr
990psi@100˚F (68bar.g@38˚C)
DIMENSIONS & WEIGHTS
C
A
ANSI/ASME 400
PMA = Maximum allowable pressure:
Maximum cold hydrostatic test pressure: 1500psi.g (103 bar.g)
(1) Permissible, but not recommended for prolonged use above 800˚F (426˚C).
(2) Pressure range indicated in the above table is the preferred operating range,
however the trap is functional from 0psi to its maximum operating pressure.
Clearance for Strainer Removal:
SF 4½ in (114 mm) min.
Maximum body design condition:
TMA = Maximum allowable temperature: 800˚F (427˚C)
2,000
909
1,400
636
9.5
1/4
6.4
850(1)
454
A105
MAX
CAPACITY
ORIFICE
0
200
400
93
38
600
Pressure psi.g
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
149
800
0
1000
Temperature °C
psi/bar
psi/bar
PMO
TSF 485
PRESSURE
RANGE (2)
VELAN FORgEd sF stEAM tRAPs
E
J
C
I
pART
A Body
B Cover
C Bimetal element
D Cover gasket
E Cover bolt(1)
F Strainer
G Stem and ball
H Cage unit gasket
I Self-lock adjusting nut
J Fixing screw
k Bimetal holder (2)
L Plug 3/8 NPT
B
D
A
K
H
Type SF
L
F
AppLICATIONS
STANDARD MATERIALS
MATERIALS
Forged carbon steel A 105 (C. Max. 0.25)
Same as body material
Truflex GB-14
S/S 316 core with graphite seal
Chrome moly.alloy
Stainless steel
SS, ball valve 58 Rc min.
S/S 316 core with graphite seal
Stainless steel
Stainless steel
Stainless steel
Carbon steel
Steam tracing or
instrument cabinet
service etc.
CONNECTIONS
●● Screwed
●● Socketweld
●● Buttweld
●● Flanged
(1) B7-ANSI CLASS 300, SB637- ANSI CLASS 400.
(2) Seat hardfaced Stellite 6.
G
ENGINEERING DATA
200
(14)
485
(33.5)
150-300
(10.4-21)
300
(21)
MaX
CaPaCiTy
OriFiCe
in/mm
˚F/˚C
lb/hr/kg/hr
psi/bar
19
1/2
12.7
3,250
1477
3,250
1,477
300-400
(21-28)
400-600
(28-42)
1/2
12.7
4,500
2,045
3/4
850(1)
454
A105
(1) Permissible, but not recommended for prolonged use above 800˚F (427˚C).
(2) Pressure range indicated in the above table is the preferred operating range,
however the trap is functional from 0psi to its maximum operating pressure.
Clearance for Strainer Removal:
SF 6 in (152 mm) min.
DIMENSIONS & wEIGHTS
1/2 3/4
1
15 20 25
B
A
A
SCR/SW
6 1/8
156
BW
12 1/8
308
PMO
psi/bar
.035 .069
MaX
CaPaCiTy
lb/hr/kg/hr
3/8
3,100
1,409
2,600
1,182
9.5
5/16
8
850(1)
454
A105
Flg
8 1/8 (1)
206
B
CenTer TO
BOTTOM
C
CenTer
TO TOP
2 1/8
54
4 3/4
121
0.69
3.5
6 10
21
42
WeighT
lb/kg
SCR/SW
13
6
BW
16
7
Flg
21(2)
9.5
PReSSuRe / TemPeRaTuRe LimiTS
2000
Pressure bar.g
1500
850
1000
300
500
200
100
200
5
1
10
50
Differential Pressure psi
Maximum cold water capacity x 3.5
27
100
55.2
69
83
427
Not recommended for
use in this region
SUPERHEATED STEAM
500
300
316
260
Trap shell
Pressure/temperature
curve
400
204
149
Steam saturation curve
200
0
454
371
600
100
45
100
41.4
Not recommended for
prolonged use above 800°F
700
500
400
27.6
93
0
SF 300
0
60
SF
13.8
SF 150
0
40
SF
Temperature °F
SF
1000
800
00
0/3
15
SF
Capacity kg/hr
50
0
SF 50
2000
Capacity lb/hr
˚F/˚C
400
(28)
600
(42)
5000
0.5
in/mm
The performance graph indicates the continuous discharge
capacities of condensate per hour at various pressure
differentials across the trap.
Differential Pressure bar
0.1
OriFiCe
(1) SF300/600 FLG: 9 1/8 in (232mm). (2) SF300/600 FLG: 23lb (10.4KG).
COnDenSaTe CaPaCiTy
60
MaX
TeMP
MaTerial
Maximum body design condition:
ANSI/ASME 300 (B7)
PMA = Maximum allowable pressure:
740psi.g @100°F (51bar.g @ 38°C)
Maximum cold hydrostatic test pressure: 1125psi.g (77bar.g)
Maximum body design condition:
ANSI/ASME 400 (SB637)
PMA = Maximum allowable pressure:
990psi.g @ 100°F (68bar.g @ 38°C)
Maximum cold hydrostatic test pressure: 1500psi.g (703bar.g)
TMA = Maximum allowable temperature: 800°F (425°C)
PMO = Maximum operating pressure:
(see Table)
TMO = Maximum operating temperature = TMA
a
FaCe TO FaCe
Size
in/mm
C
PreSSUre
range
200
400
600
Pressure psi.g
600
---------- Pressure limit for trap type
CURVE 1
800
CURVE 2
1000
38
0
1200
Bolting:
ASME SA193 B7 – Curve 1: Ansi 300,
ASME SB637 N07718 – Curve 2: Ansi 400
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 11
Temperature °C
0-50
(0-3.5)
50-150
(3.5-10.4)
MaX
TeMP
MaTerial
SF 600
psi/bar
PMO
psi/bar
SF 400
PreSSUre
range(2)
11
9/1/09 4:34:45 PM
VELAN BIMEtALLIC stEAM tRAPs
BIMEtALLIC ELEMENt
ON tYPE ssF, N150, N675, N900, N2500,
N2600, N4000
BIMETAL ELEMENT
The idividual segments of the
bimetallic element act consecutively,
developing forces in close relation
to the saturated steam curve. This
permits sensitive, efficient trap
operation at all pressures.
Separate seat
Screwed ≤ 600 psi
Welded > 600 psi
COMMON DESIGN FEATURES
TYpE SSF FEATURES
●● Automatic air venting - good discharge capacity
●● Easy internal maintenance
Air and cold condensate is discharged through a full
orifice efficiently ensuring fast warm-up of equipment.
●● Integral strainer
An integral stainless steel strainer protects the trap
operating mechanism from damage by dirt or scale.
No extra fittings or installation costs are required.
Free strainer area minimum 5 to 1.
Perforation is 0.031” (0.8 mm).
●● All-position installation
simplifies piping layout.
●● Silent operation – no violent line shocks.
●● Freezeproof in vertical position - inlet on top
without insulation - complete drainage when cold.
●● positive closing
Every Velan trap closes tightly on saturated steam
temperature. Positive closing for long periods on dry
superheated steam has enormous advantages in power
plant and marine service.
●● valve seats Stellited
All Velan valve seats are Stellite faced to increase their
resistance to the high degree of wear through velocity
of flow, dirt and scale.
●● positive condensate drainage
●● Silent operation – no violent line shocks.
●● Trim is stainless steel with ball 58 Rc min.
The removal of the body cover provides easy access
to the bimetallic element and seat. The removal of
the strainer cover permits quick and easy removal of
the strainer.
●● Optional temperature controller
An ingenious device that can be
adapted to most Velan models
permitted adjustment of factory
setting under full steam pressure.
Condensate discharge temperature can
be increased or decreased to meet the
specific requirements of any process
application. Up to 30% of energy can
be saved by extracting the sensible
heat of steam.
●● Optional extras include:
Thermometer, strainer blowdown
valve and Piping King Units complete
with valving.
TYpE N DESIGN FEATURES
●● Easy access
to all the internal operating parts when
the body cover is removed.
●● Forged valve body and cover
offer the advantages of high strength, structural
integrity and reliability that make it an ideal choice
for steam service.
●● Other options include:
NPT blow down plug, strainer blowdown valve
and Piping King Unit with all valving.
12
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 12
9/1/09 4:34:46 PM
VELAN BIMEtALLIC ssF stEAM tRAPs
E
B
F
AppLICATIONS
STANDARD MATERIALS
D
pART
MATERIALS
Cast carbon steel WCB
Body
(C. Max. 0.25)
Cover
Carbon steel
Bimetal element
Truflex GB-14
S/S 321 spiral wound with
Cover gasket
graphite filler
Cover stud
Chrome moly. alloy B7
Cover nut
Carbon steel 2H
Strainer
Stainless steel
Stem and ball
Ss, ball valve 58Rc
Seat
SS hardfaced Stellite 6
S/S 321 spiral wound with
Strainer cover gasket
graphite filler
Adjusting nut and locknut Stainless steel
Strainer blow down plug
Carbon steel
Fixing screw and washer
Stainless steel
A
B
C
D
E
F
G
H
I
J
J
L
Type SSF
G K C N
A
I
k
L
M
H
ENGINEERING DATA
PreSSUre
range(2)
PMO
psi/bar
psi/bar
0-125
(0-8.5)
125-200
(8.5-14)
200-400
(14-28)
400-600
(28-42)
CONNECTIONS
MaX
TeMP
MaTerial
OriFiCe
in/mm
˚F/˚C
125
(8.5)
200
(14)
400
(28)
600
(42)
For draining: oil storage tank
coils, acid stills, purifiers,
feed water heaters, flush
tanks, separators, vacuum
pans, heat exchangers, high
pressure process equipment,
high pressure main lines and
general industrial service in
medium to high pressure/
temperature applications
with high condensate
discharge rates. Widely used
in power, petroleum and
chemical plants, marine
service and steel industries
to meet safety requirements.
454
●●Screwed ●●Socketweld ●●Buttweld ●●Flanged
lb/hr/kg/hr
1
25
7/8
22
9/16
14
1/2
12.7
850(1)
WCB
MaX
CaPaCiTy
5,750
2,608
6,400
2,903
5,300
2,409
5,200
2,360
Maximum body design condition:
ANSI/ASME 400
PMA = Maximum allowable pressure:
990psi@100˚F (68bar.g@38˚C)
TMA = Maximum allowable temperature: 800˚F (427˚C)
Maximum cold hydrostatic test pressure: 1500psi.g (103bar)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure:
(See Table)
(1) Permissible, but not recommended for prolonged use above 800˚F (427˚C).
(2) Pressure range indicated in the above table is the preferred operating range, however the trap is functional from 0psi to its maximum operating pressure.
DIMENSIONS & wEIGHTS
C
Size
TyPe
B
in/mm
2
50
1 1/2
40
2
50
SSF 125
A
SSF 200
SSF 400
SSF 600
Clearance for Strainer Removal:
9 in (229 mm) min.
a
FaCe TO FaCe
SCR/SW
BW
Flg
11
279
17
432
COnDenSaTe CaPaCiTy
2
3
4
7
14
C
CenTer TO TOP
5 3/8
137
3 1/2
89
14 1/4
362
21
SCR/SW
BW
Flg
30
14
33
15
40
18
PReSSuRe / TemPeRaTuRe LimiTS
3000
6000
0
5000
850
2000
13.8
27.6
Pressure bar.g
41.4
55.2
69
83
454
Not recommended for
prolonged use above 800°F
427
00
F6
SS
1000
2000
371
600
Not recommended for
use in this region
SUPERHEATED STEAM
500
400
Steam saturation curve
300
149
10
50
100
Differential Pressure psi
Maximum cold water capacity x 3.5
500
1000
0
0
200
SSF 600
SSF 400
SSF 200
SSF 125
93
100
455
260
204
Trap shell
Pressure/temperature
curve
200
1000
316
Temperature °C
F
SS
Temperature °F
3000
1500
0
40
Capacity kg/h
00
SS
F1
25
800
700
F2
SS
Capacity lb/h
lb/kg
42
7000
4000
WeighT
The performance graph indicates the continuous discharge capacities of
condensate per hour at various pressure differentials across the trap.
Differential Pressure bar
1
B
CenTer TO BOTTOM
400
600
38
800
1000
1200
0
Pressure psi.g
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 13
13
9/1/09 4:34:46 PM
VELAN FORgEd BIMEtALLIC N150–300 stEAM tRAPs
F
E
G N
C
K
pART
A
D
B
C
D
E
F
G
H
I
J
k
L
M
N
H
I
L
AppLICATIONS
STANDARD MATERIALS
B
M
J
A
Type N150/300
MATERIALS
Forged carbon steel A105
Body
(C. Max. 0.25)
Forged alloy steel F22
Cover
Same as body material
Bimetal element
Truflex GB-14
Cover gasket
S/S 321 spiral wound with graphite filler
Cover stud (1)
Chrome moly. alloy
Cover nut (1)
Carbon steel, alloy steel
Strainer
Stainless steel
Stem and ball
Ss, ball valve 58Rc
Seat
SS hardfaced Stellite 6
S/S 321 spiral wound with graphite filler
Plug gasket
Adjusting nut and locknut Stainless steel
Strainer blow down plug Carbon steel or chrome moly. steel
Fixing screw and washer Stainless steel
Fixing screw and washer Stainless steel
(1) B7/2H (A105), B16/Gr.4 (F22).
psi/bar
0-150
(0-10.5)
150-300
(10.5-21)
PMO
psi/bar
150
(10.5)
300
(21)
MaX
TeMP
MaTerial
˚F/˚C
850(2)
454
A105(1)
MaX
CaPaCiTy
OriFiCe
in/mm
2,800
1,272
3,500
1,590
12.7
●● Turbine drains
●● Desuperheater
●● High pressure processing
●● General high pressure/
temperature service
CONNECTIONS
Maximum body design condition:
ANSI/ASME 400
PMA = Maximum allowable pressure:
1000psi@100˚F (69bar.g@38˚C)
TMA = Maximum allowable temperature: 800˚F (427˚C) – A105
1050F (565C) – F22
Maximum cold hydrostatic test pressure: 1500psi.g (103bar)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure:
(See Table)
lb/hr/kg/hr
1/2
●● Steam main drainage
●●Screwed ●●Socketweld
●●Buttweld ●●Flanged
ENGINEERING DATA
PreSSUre
range (3)
Type N steam traps resolve
all problems with high
pressure steam trapping
on superheated steam lines
in thermal power plants or
aboard ships. Over 1,100
U.S. Navy ships have used
Velan steam traps.
(1) Also available in: F22, max temp. 1050˚F (565˚C).
(2) Permissible, but not recommended for prolonged use above 800˚F (426˚C).
(3) Pressure range indicated in the above table is the preferred operating range, however the trap is functional from 0psi to its maximum operating pressure.
DIMENSIONS & wEIGHTS
a
FaCe TO FaCe
SCR/SW
BW
Flg
B
CenTer TO
BOTTOM
7 1/4
184
13 1/4
337
11 1/4
286
2
51
Size
in/mm
1/2
B
A
15
A
3/4
1
25
20
0.069
Differential Pressure bar
0.69
3.5 6 10
21
2000
1050
1500
1000
2000
200
0.1
1
10
50
100
500
Not recommended for
prolonged use above 800°F
14
565
500
Trap shell
Pressure/temperature
curve
400
0
427
316
260
204
149
Steam saturation curve
200
3000
454
371
SUPERHEATED
STEAM
600
Differential Pressure psi
Maximum cold water capacity x 3.5
Not recommended for
use in this region
700
93
27
1000
69
482
100
5
55.2
900
N150
45
41.4
538
300
100
27.6
5
200
Pressure bar.g
13.8
A10
100
0.5
37
17
1000
800
Temperature °F
500
0
850
Capacity kg/h
500
400
300
60
Flg
26
12
2
F2
Capacity lb/h
0
0
N3
/
50
N1
BW
24
11
PReSSuRe / TemPeRaTuRe LimiTS
42 64 105 170
5000
1000
SCR/SW
4 1/2
115
lb/kg
The performance graph indicates the continuous discharge capacities of
condensate per hour at various pressure differentials across the trap.
COnDenSaTe CaPaCiTy
0.035
WeighT
C
CenTer
TO TOP
Temperature °C
C
0
200
N300
Clearance for Strainer Removal:
N150/300; 5½ in(140 mm) min.
38
400
600
Pressure psi.g
800
1000
0
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 14
9/1/09 4:34:48 PM
VELAN FORgEd hP/ht N675–1500 stEAM tRAPs
F
E
G N
C
pART
K
MATERIALS
Forged carbon steel A105
Body
(C. Max. 0.25)
Forged alloy steel F22
Cover
Same as body material
Bimetal element
Truflex GB-14
Cover gasket
S/S 321 spiral wound with graphite filler
Cover stud (1)
Chrome moly. alloy
Cover nut (1)
Carbon steel, Stainless steel
Strainer
Stainless steel
Stem and ball
SS, ball valve 58Rc
Seat
SS hardfaced Stellite 6
S/S 321 spiral wound with graphite filler
Plug gasket
Adjusting nut and locknut Stainless steel
Strainer blow down plug Carbon steel or Chrome moly. steel
Test plug
Carbon steel or chrome moly. steel
Fixing screw and washer Stainless steel
A
D
B
C
D
E
F
G
H
I
J
k
L
M
N
H
I
L
AppLICATIONS
STANDARD MATERIALS
B
J
M
A
Type N675-1500
Type N steam traps resolve
all problems with high
pressure steam trapping on
superheated steam lines
in thermal power plants or
aboard ships. Over 1,100
U.S. Navy ships have used
Velan steam traps.
●● Steam main drainage
●● Turbine drains
●● Desuperheater
●● High pressure processing
●● General high pressure/
temperature service
CONNECTIONS
(1) B7/2H (A105), B16/Gr.4 (F22), SB637 bolting for ANSI/ASME class 1500 shell.
●●Screwed ●●Socketweld
●●Buttweld ●●Flanged
ENGINEERING DATA
PreSSUre
range (3)
psi/bar
300-675
(21-46.5)
675-900
(46.5-62)
900-1500
(62-103)
PMO
MaX
TeMP
MaTerial
psi/bar
in/mm
˚F/˚C
lb/hr/kg/hr
5/16
675
(46.5)
900
(62)
1500
(103)
2,900
1,315
1,850
841
2,100
955
8
850(2)
454
A105(1)
Standard bolting: B7/B16
PMA = Maximum allowable pressure:
1830psi@100˚F (126bar.g@38˚C)
TMA = Maximum allowable temperature: 800˚F (427˚C) – A105
1050˚F (565˚C) – F22
Maximum cold hydrostatic test pressure: 2750psi.g (190bar.g)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure:
(See Table)
MaX
CaPaCiTy
OriFiCe
1/4
6.4
Special bolting: SB637
Maximum design condition:
PMA = Maximum allowable pressure:
ANSI/ASME 1500
3705psi@100˚F (255bar.g@38˚C) – A105
3750psi@100˚F (258bar.g@38˚C) – F22
(1) Also available in: F22, max temp. 1050˚F (565˚C).
Maximum cold hydrostatic test pressure: 5575psi.g (384bar.g) – A105
(2) Permissible, but not recommended for prolonged use above 800˚F (426˚C).
5625psi.g (388bar.g) – F22
(3) Pressure range indicated in the above table is the preferred operating range,
however the trap is functional from 0psi to its maximum operating pressure.
DIMENSIONS & wEIGHTS
a
FaCe TO FaCe
Size
in/mm
C
1/2
B
A
3/4
15
A
SCR/SW
BW
Flg
7 1/4
184
13 1/4
337
11 1/4
286
1
25
20
0.069
Differential Pressure bar
0.69
3.5 6 10
WeighT
lb/kg
SCR/SW
BW
Flg
24
11
26
12
37
17
4 1/2
115
2
51
The performance graph indicates the continuous discharge capacities of
condensate per hour at various pressure differentials across the trap.
COnDenSaTe CaPaCiTy
0.035
B
C
CenTer TO CenTer
BOTTOM
TO TOP
21
42 64 105 170
PReSSuRe / TemPeRaTuRe LimiTS
5000
2000
1500
1050
1000
2000
0
34.5
1000
69
Pressure bar.g
103
138
172
207
241
538
B16
900
N
500
300
0
50
1
0/N
200
0
N9
454
Not recommended for
prolonged use above 800°F
800
Not recommended for
use in this region
SUPERHEATED STEAM B
7
700
600
Steam saturation curve
60
0.1
0.5
1
5
10
50
100
Differential Pressure psi
Maximum cold water capacity x 3.5
500
27
1000
3000
0
0
500
1000
1500
STD Bolting
100
N1500
N900
N675
200
5
A10
45
371
2000
Pressure psi.g
260
2
400
Trap shell
Pressure/temperature
curve
300
100
427
316
500
F2
100
200
Temperature °F
Capacity lb/h
5
67
482
850
Capacity kg/h
500
400
1000
276
565
204
149
93
38
2500
3000
3500
0
4000
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 15
Temperature °C
Clearance for Strainer Removal:
N675/1500; 5½ in(140 mm) min.
15
9/1/09 4:34:50 PM
VELAN forged HP/HT N2500–2600 steam traps
E
G
N
PART
A Body
B Cover
C Bimetal element
MATERIALS
Forged alloy steel F22, F91
Same as body material
Truflex GB-14
S/S 321 spiral wound with
D Cover gasket
graphite filler
E Cover stud(1)
Chrome moly. alloy
F Cover nut(1)
Carbon steel, stainless steel
G Strainer
Stainless steel
H Stem and ball
SS, ball valve 58Rc
I Seat
SS hardfaced Stellite 6
S/S
321 spiral wound with
J Plug gasket
graphite filler
K Adjusting nut and locknut Stainless steel
steel or
L Strainer blow down plug Carbon
chrome moly. steel
Carbon steel or
M Test plug
chrome moly. steel
N Fixing screw and washer
Stainless steel
K
D
C
A
H
L
APPLICATIONS
Standard materials
B
M
I
Type N2500/2600
Type N steam traps resolve
all problems with high
pressure steam trapping on
superheated steam lines
in thermal power plants or
aboard ships. Over 1,100
U.S. Navy ships have used
Velan steam traps.
●● Steam main drainage
●● Turbine drains
●● Desuperheater
●● High pressure processing
●● General high pressure/
temperature service
Connections
● Screwed ● Socketweld
● Buttweld ● Flanged
(1)Durahete 1055 (F22), Nimonic 80A (F91), SB637 bolting
for ANSI/ASME class 2500 shell.
Engineering Data
PRESSURE
RANGE (1)
psi/bar
500-2500
(34.5-172)
500-2600
(34.5-179)
PMO
MATERIAL
psi/bar
MAX
TEMP
in/mm
˚F/˚C
2500
(172)
2600
(179)
1050
565
1100
593
F22
F91
Standard bolting: DURAHETE 1055 – F22, NIMONIC 80A – F91
Maximum design condition:
ANSI/ASME Class 1500
PMA = Maximum allowable pressure:
3750psi@100˚F (259bar.g@38˚C)
TMA = Maximum allowable temperature: 1050˚F (565˚C) – F22
1100˚F (593˚C) – F91
Maximum cold hydrostatic test pressure: 5625psi (388bar.g)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure:
(See Table)
MAX
CAPACITY
ORIFICE
lb/hr/kg/hr
4,800
2,182
4,900
2,227
5/16
8
Special bolting: SB637
Maximum design condition:
ANSI/ASME 2500
PMA = Maximum allowable pressure:
6250psi@100˚F (431bar.g@38˚C)
Maximum cold hydrostatic test pressure: 9375psi (647bar.g)
(1) Consult works for operating pressure below 500psi (34.5 bar).
Clearance for Strainer Removal:
N2500/2600; 15 in (381 mm) min.
DIMENSIONS & WEIGHTS
A
Face to Face
Size
C
in/mm
B
A
1/2
15
A
3/4
20
1
25
SW
BW
FLG
10
254
16
406
15 1/2
349
Weight
B
C
Center to Center
bottom
to top
2 5/8
67
lb/kg
8 1/8
206
SW
BW
FLG
80
36
83
38
105
48
CONDENSATE CAPACITY
34.5
42
Differential Pressure bar
64
105
The performance graph indicates the continuous
discharge capacities of condensate per hour at
various pressure differentials across the trap.
170
5000
2000
Pressure / Temperature Limits
Pressure bar.g
1000
Differential Pressure psi
Maximum cold water capacity x 3.5
16
2000
3000
138
172
F22
207
241
276
310
F22
900
800
700
349
379
414
Not recommended for
use in this region
F91
600
500
Trap shell
Pressure/temperature
curve
Steam saturation curve
400
300
200
100
0
0
500
1000
1500
2000
2500
538
482
427
316
Special
260
bolting 204
149
93
Standard
bolting
3000
448
593
371
N2600-F91
Temperature °F
500
103
1
F9
2000
69
1000
3000
1000
34.5
3500
4000
4500
Temperature °C
1100
0
N2500-F22
0
60
2
/N
00
5
N2
Capacity kg/h
Capacity lb/h
4000
5000
5500
6000
38
0
6500
Pressure psi.g
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 16
9/1/09 4:34:51 PM
VELAN FORgEd hP/ht N4000 stEAM tRAPs
pART
E
B
D
H
K
A
MATERIALS
A
Body
Forged alloy steel F91
B
Cover
Same as body material
C
Bimetal element
Truflex GB-14
D
Cover gasket
S/S 321 spiral wound
with graphite filler
E
Cover stud
Nickle chrome alloy
F
Cover nut
Nickle chrome alloy
G Strainer
N
G
AppLICATIONS
STANDARD MATERIALS
F
C
I
M
Type N4000
Type N steam traps resolve
all problems with high
pressure steam trapping on
superheated steam lines
in thermal power plants or
aboard ships. Over 1,100 U.S.
Navy ships have used Velan
steam traps.
●● Steam main drainage
●● Turbine drains
Stainless steel
●● Desuperheater
H
Stem and ball
SS, ball valve 58Rc
I
Seat
SS hardfaced Stellite 6
J
Adjusting nut and locknut
Stainless steel
k
Test plug
Carbon steel or
chrome moly. steel
L
Fixing screw and washer
Stainless steel
●● High pressure processing
●● General high pressure/
temperature service
CONNECTIONS
●●Socketweld ●●Buttweld
ENGINEERING DATA
PreSSUre
range
psi/bar
500-4000
(34.5-276)
PMO
MaX
TeMP
MaTerial
psi/bar
in/mm
˚F/˚C
4000
(276)
lb/hr/kg/hr
5/16
1100
593
F91
MaX
CaPaCiTy
OriFiCe
4,900
4,900
8
Clearance for Strainer Removal:
N4000; 18 in (457 mm) min.
Maximum body design condition:
ANSI/ASME Class 4500
PMA = Maximum allowable pressure:
11250psi@100˚F (776bar@38˚C)
TMA = Maximum allowable temperature: 1100˚F (593˚C)
Maximum cold hydrostatic test pressure: 16875psi (1164bar)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure:
(See Table)
DIMENSIONS & wEIGHTS
C
a
FaCe TO FaCe
Size
in/mm
B
1/2
A
15
A
SW
3/4
1
25
20
10
254
BW
16
406
B
CenTer TO
BOTTOM
5/8
2
67
WeighT
C
CenTer
TO TOP
SW
BW
14
356
120
55
125
57
lb/kg
COnDenSaTe CaPaCiTy
The performance graph indicates the continuous
discharge capacities of condensate per hour at
various pressure differentials across the trap.
Differential Pressure bar
.069
0.69
3.5
6 10
21
42 64 105 170
345
5000
2000
1500
SHELL pRESSURE/TEMp LIMIT
500
1000
400
300
500
200
100
100
1
5
10
50
100
500
45
1000
5000
Capacity kg/hr
Capacity lb/hr
N4
0
00
1000
TeMPeraTUre
˚F (˚C)
PreSSUre
Psi (bar)
TeMPeraTUre
˚F (˚C)
PreSSUre
Psi (bar)
100 (38)
11,250 (775.5)
750 (399)
7,970 (549.5)
200 (93)
11,250 (775.5)
800 (427)
7,610 (524.5)
300 (149)
10,925 (753)
850 (454)
7,305 (503.5)
400 (204)
10,585 (730)
900 (482)
6,740 (465)
500 (260)
9,965 (687)
950 (510)
5,795 (399.5)
600 (315)
9,070 (625)
1000 (538)
5,450 (376)
650 (343)
8,825 (608.5)
1050 (565)
5,400 (372)
700 (371)
8,515 (587)
1100 (593)
4,525 (312)
Differential Pressure psi
Maximum cold water capacity x 3.5
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 17
17
9/1/09 4:34:53 PM
VELAN hERMEtICALLY sEALEd stEAM tRAP
hERMEtICALLY sEALEd uNIt ON tYPE Q250 ANd ust
HERMETICALLY
SEALED UNIT
The hermetically sealed
body is seal welded and
contains all operating
parts.
Type Q250
Type UST
COMMON DESIGN FEATURES
●● positive closing
The bimetallic element is a function of the saturated
steam curve (pages 4 & 5) and its sensitivity to the
temperature change assures an immediate reaction
to both steam and condensate for the entire pressure
range. At saturated temperature the valve is closed.
●● All-position installation
Simplifies piping layout for easy plant standardization.
●● Self-aligning precision ball valve
Single free-floating stainless steel hardened Rc 58 min.
ball valve.
●● Air venting - good discharge capacity
Air and cold condensate is discharged through a full
orifice efficiently ensuring fast warm-up of equipment.
●● Check valve operation
The main valve acts as a check valve preventing
back flow.
●● positive condensate drainage for process work.
●● Guaranteed against water hammer
The downstream valve acts as a release valve on the
excess water pressure without damage to internal parts.
●● valve seats Stellited
All Velan valve seats are Stellite faced
to increase their resistance to the
high degree of wear through velocity
of flow, dirt and scale.
TYpE Q250 DESIGN FEATURES
TYpE UST DESIGN FEATURES
●● Freezeproof installation
●● Integral strainer
Velan traps do not require a reservoir of priming
water in the body to operate. When installed
vertically with inlet on top, they drain completely
when cold, and are freezeproof without insulation.
An integral stainless steel strainer protects the trap
operating mechanism from damage by dirt or scale.
No extra fittings or installation costs are required.
Free strainer area 26%. Perforation is 0.031” (0.8mm).
●● Compatibility
Compatible with most other manufacturers trap
modules.
●● Easy removal
Steam trap can be removed and replaced in minutes
by undoing 2-bolts and without having to disconnect
any piping.
●● NPT blow down plug
●● Velan connectors are available separately with screwed
and socketweld connections.
●● All position installation (Swivel 360 DEG).
18
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 18
9/1/09 4:34:54 PM
VELAN hERMEtICALLY sEALEd Q250 stEAM tRAP
AppLICATIONS
STANDARD MATERIALS
pART
A Inlet shell
B Outlet shell
C Bimetal element
D Stem and ball
E Seat
F Self locking adjustable nut
G Fixing screw
A
G
F
C
B
MATERIALS
Stainless steel CF8M
Stainless steel CF8M
Truflex GB-14
S/S, ball valve 58Rc min.
Stellite 6
Stainless steel
Stainless steel
Steam tracing, line
drain and most general
process applications.
CONNECTIONS:
●● Screwed
●● Socketweld
E
SIMpLE pRINCIpLE OF OpERATION
A single free-floating ball valve:
D
●● Vents air
●● Discharges condensate
●● Traps steam
●● Acts as a check valve.
Type Q250
ENGINEERING DATA
psi/bar
0-250
(0-17)
250
(17)
psi/bar
PMO
MaX
TeMP
MaTerial
in/mm
˚F/˚C
lb/hr/kg/hr
3/8
500
260
S/S CF8M
MaX
CaPaCiTy
OriFiCe
2,700
1,227
9.5
COnDenSaTe CaPaCiTy
The performance graph indicates the continuous discharge capacities of
condensate per hour at various pressure differentials across the trap.
Differential Pressure bar
0.035 0.069
0.69
Maximum design condition:
ANSI/ASME 300
PMA = Maximum allowable pressure:
720psi@100˚F (49bar@38˚C)
TMA = Maximum allowable temperature: 500˚F (260˚C)
Maximum cold hydrostatic test pressure: 1100psi (75bar)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure:
(See Table)
a
FaCe TO
FaCe
B
CenTer TO
BOTTOM
C
CenTer
TO TOP
WeighT
4
102
3/4
2 1/2
64
3 1/2
1.5
1/2
15
C
3/4
B
20
19
42
1000
2000
lb/kg
Capacity lb/h
in/mm
21
1500
DIMENSIONS & wEIGHTS
A
6 10
2000
0
500
25
1000
Size
3.5
5000
Q
400
300
500
200
100
200
45
100
60
0.1
20.7
27.6
200
100
0
41.4
48.3
Not recommended for
use in this region
0
100
200
204
93
Trap shell
Pressure/temperature
curve
300
400
10
50
27
100
600
55.2
260
149
Steam saturation
curve
5
Maximum cold water capacity x 3.5
34.5
400
300
1
500
600
38
700
Temperature °C
Pressure bar.g
13.8
Q250
Temperature °F
500
6.9
0. 5
Differential Pressure psi
PReSSuRe / TemPeRaTuRe LimiTS
0
Capacity kg/h
PreSSUre
range
0
800
Pressure psi.g
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 19
19
9/1/09 4:34:54 PM
VELAN hERMEtICALLY sEALEd ust stEAM tRAP
pART
A Cover
B Self locking adjustable nut
C Stem and ball
D Body
E Flange
F Blowdown plug
A
B
I
G
G Seat
H
H Strainer
I Bimetal element
J Plug
C
D
Type
UST
AppLICATIONS
STANDARD MATERIALS
J
MATERIALS
Stainless steel CF8M
Stainless steel
S/S, ball valve 58Rc min.
Stainless steel CF8M
Stainless steel F316
Carbon steel electro plated
Stainless steel 316 hardfaced
(Stellite 6)
Stainless steel 304
Truflex GB-14
Carbon steel electro plated
Steam tracing, line drain
and most general process
applications.
CONNECTIONS:
●● Screwed
●● Socketweld
SIMpLE pRINCIpLE OF OpERATION
E
A single free-floating ball valve:
F
●● Vents air
●● Discharges condensate
●● Traps steam
●● Acts as a check valve.
ENGINEERING DATA
0-300
(0-21)
300
(21)
MaTerial
MaX(1)
TeMP
OriFiCe
˚F/˚C
S/S CF8M
in/mm
MaX
CaPaCiTy
lb/hr/kg/hr
5/16
800(1)
425
COnDenSaTe CaPaCiTy
The performance graph indicates the continuous discharge capacities of
condensate per hour at various pressure differentials across the trap.
Differential Pressure bar
690
315
8
.035
(1) Consult works if the expected service temperature will be >500°F (260°C)
as the ferrite level has to be controlled.
0.69
3.5
6
10
21
1000
400
300
Maximum design condition:
ANSI/ASME 300
PMA = Maximum allowable pressure:
720psi@100˚F (50bar@38˚C)
500
T
Capacity lb/hr
TMA = Maximum allowable temperature: 800˚F (425˚C) (see note)
Maximum cold hydrostatic test pressure: 1100psi (75bar)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure:
.069
(See Table)
US
5 /16
200
100
200
45
100
60
0.5
0.1
A
5 1/8
130
B
CenTer TO
BOTTOM
1 3/4
45
800
C
CenTer TO
TOP
2 3/4
70
0
6.9
13.8
20.7
27.6
34.5
41.4
48.3
700
WeighT
lb/kg
3 1/2
1.5
Not recommended for
use in this region
SUPERHEATED STEAM
500
400
316
260
204
300
Steam saturation
curve
200
0
55.2
427
371
600
100
0
100
200
300
149
Trap shell
Pressure/temperature
curve
93
38
400
500
Pressure psi.g
---------- Pressure limit for trap type
20
300
Pressure bar.g
Temperature °F
in/mm
a
FaCe TO
FaCe
1 7/8
48
27
100
PReSSuRe / TemPeRaTuRe LimiTS
DIMENSIONS & wEIGHTS
Size
50
10
Differential Pressure psi
Maximum cold water capacity x 3.5
C
D
5
1
UST 300
B
Capacity kg/hr
psi/bar
psi/bar
PMO
Temperature °C
PreSSUre
range
600
700
0
800
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 20
9/1/09 4:34:55 PM
VELAN CONNECtORs
VELAN CONNECtORs FOR
hERMEtICALLY sEALEd
uNIVERsAL stEAM tRAP
Velan connectors are designed to be used
with swivel connector steam traps.
The connector can be installed horizontally
or vertically into the pipeline. The steam
trap is attached to the connector by means
of two hexagon screws and can be rotated
360 degrees to ensure the trap is in correct
orientation.
CONNECTIONS
●●Screwed ●●Socketweld
ENGINEERING DATA
PreSSUre
range
MaTerial
pst / bar
0-300
0-17
S/S CF8M
DIMENSIONS & wEIGHTS
Size
in / mm
MaX TeMP(1)
ºF/ºC
800
425
A
WeighT
lb / kg
1/2
2
7/16
62
1.1
0.5
3/4
20
2 7/8
73
1.2
0.55
1
25
3 1/2
89
1.9
0.86
15
(1) Consult works if the expected service
temperature will be >500°F (260°C)
as the ferrite level has to be controlled.
a
FaCe TO FaCe
Illustration showing a complete assembly
of universal steam trap connector.
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 21
21
9/1/09 4:34:56 PM
VELAN hIgh CAPACItY PIstON OPERAtEd stEAM tRAP
Type
Sp
Type
SpF
COMMON DESIGN FEATURES
●● piston cage unit
The advanced piston cage unit design combines
a liner, piston, main seat and main valve into one
factory-tested assembly to ensure
precise alignment and simple
PISTON CAGE UNIT
maintenance. In the SPF Type there
is also a bimetallic cage unit.
●● valve seats Stellited
The main and pilot valve seats
are Stellite faced to increase their
resistance to the high degree of
wear through velocity of flow, dirt
and scale.
●● All in one construction unit
●● positive closing
As steam contacts the bimetal element, the pull closes
the pilot valve, reducing the pressure on the piston.
Line pressure below the main valve closes the valve
tightly on the seat (see pg. 7).
●● positive condensate drainage for process work.
●● Check valve operation
The main valve acts as a check valve preventing
back flow.
●● Temperature controller
controls and adjusts the discharge temperature of
condensate which can be calibrated using a special
thermometer (see page 45).
Air vent, main valve, check valve,
strainer and temperature controller
are a single unit, ensuring
perfect alignment and ease of
maintenance.
Sp DESIGN FEATURES
TYpE SpF DESIGN FEATURES
●● Integral strainer
●● SpF only: Can include
An Integral stainless steel
strainer protects the trap
operating mechanism from
damage by dirt or scale.
a “Y” type strainer in line
to protect trap.
No extra fittings or installation
costs are required. Free strainer
area minimum 5 to 1. Perforation
is 0.031” (0.8 mm).
22
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 22
9/1/09 4:34:57 PM
VELAN hIgh CAPACItY PIstON OPERAtEd stEAM tRAP
F
pART
A Body
B Cover
C Bimetal element
B
D
I
C
D
D
J
A
C
B
G
G
psi/bar
10-200
0.69-14
200-350
14-24
350-600
24-42
600-1500
42-103
SPF0
SPF1
SPF2
SPF3
PMO
MaTerial
psi / bar
Gasket
E
F
G
I
J
M
Cover stud
Cover nut
Cap screw
Piston cage unit
Pilot valve
Temp controller
●●Screwed ●●Socketweld
ENGINEERING DATA
PreSSUre
range (2)
D
MaX
TeMP
in/mm
˚F/˚C
200
14
350
24
600
42
1500
103
850(1)
454
A105
MaX
CaPaCiTy
OriFiCe
Size
B
A
in/mm
SPF
0,1,2,3
1
25
1 1/2
40
SPF
4,5,6,7
1 1/2
40
2
50
psi/bar
10-200
0.69-14
200-350
14-24
350-600
24-42
600-1500
42-103
7/8
22
14 3/4
375
12
305
Differential Pressure bar
3.5
6
10
21
SPF5
SPF6
SPF7
42
64
105
12
305
●●Flanged
PMO
170
12
305
1500
12 3/4
324
14 1/4
362
5 1/8
130
5 1/2
140
700
10,000
20,000
,3
,2
0,1
F
SP
10
50
100
500
Differential Pressure psi
Maximum cold water capacity x 3.5
3200
1000
3000
WeighT
lb/kg
200
48
22
FlangeD
350
600
53
56
24
25
1500
64
29
67
30
69
31
100
45
81
37
69
103
138
172
207
241
454
Not recommended for
use in this region
600
Trap shell
Pressure/temperature
curve
Steam saturation
curve
400
204
149
100
0
500
1000
1500
93
38
2000
Pressure psi.g
2500
3000
0
3500
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 23
371
260
300
0
427
316
500
SPF200
SPF350
4545
7000
55
25
SUPERHEATED STEAM
200
10,000
1 3/8
35
SPF1500
30,000
34.5
SPF600
15,000
Temperature °F
20,000
5
50
23
Not recommended for
prolonged use above 800°F
800
Capacity kg/h
Capacity lb/h
850
25,000
F4,
850(1)
454
A105
38,000
17,272
43,000
19,545
49,000
22,272
63,000
28,636
Pressure bar.g
0
30,000
SP
lb/hr/kg/hr
PReSSuRe / TemPeRaTuRe LimiTS
60,000
50,000
45,000
40,000
35,000
40,000
˚F/˚C
200
14
350
24
600
42
1500
103
70,000
,6,7
MaX
MaX
TeMP OriFiCe
CaPaCiTy
in/mm
C
B
CenTer CenTer
TO
TO
SCR/SW BW
TOP
BOTTOM
7
3
4 /8
5 /16
35
39
124
132
16
18
80,000
60,000
50,000
MaTerial
psi / bar
PMA: Maximum allowable pressure:
3000psi@100˚F (207bar@38˚C)
TMA: Maximum allowable temperature: 800˚F (427˚C)
Maximum cold hydrostatic test pressure: 4500psi (310bar)
TMO = Maximum operating temperature = TMA
PMO: Maximum operating pressure:
(see Table)
200,000
100,000
90,000
80,000
70,000
Reboilers, purifiers, vacuum
pans, heat exchangers,
evaporators, feed water
heaters, digesters,
desuperheaters, steam
separators, flash tanks, large
autoclaves, steam catapult
service on U.S. Navy aircraft
carriers and other large
capacity applications.
The performance graph indicates the continuous discharge
capacities of condensate per hour at various pressure
differentials across the trap.
COnDenSaTe CaPaCiTy
0.69
SPF4
a
FaCe TO FaCe
FlangeD
SCR/SW BW
200
350 600
7 3/4
13 3/4 10 3/4
11
11
197
349
273
279 279
8 3/4
222
PreSSUre
range (2)
TyPe
17,000
7,727
19,000
8,636
22,000
10,000
27,000
12,273
DIMENSIONS & wEIGHTS
TyPe
●●Buttweld
lb/hr/kg/hr
(1)Permissible, but not recommended for prolonged use above 800˚F (427˚C) .
(2) Pressure range indicated in the above table is the preferred operating range,
however the trap is functional from 10psi to its maximum operating pressure.
C
MATERIALS
Forged carbon steel A105
Same as body material
Truflex GB-14
S/S 321 spiral wound with
graphite filler
Chrome moly. Alloy B7
Carbon steel 2H
Chrome moly alloy
Stainless steel
Stainless steel, ball 58Rc min.
Stainless steel
CONNECTIONS
Type SpF0-7 (A105)
TyPe
AppLICATIONS
STANDARD MATERIALS
E
Temperature °C
M
23
9/1/09 4:34:58 PM
VELAN hIgh CAPACItY PIstON OPERAtEd stEAM tRAP
F
M
AppLICATIONS
STANDARD MATERIALS
E
B
D
pART
A Body
B Cover
C Bimetal element
I
C
D
D
J
A
C
B
G
D
Gasket
E
F
G
I
J
M
Cover stud
Cover nut
Cap screw
Piston cage unit
Pilot valve
Temp controller
MATERIALS
Forged alloy steel F22
Same as body material
Truflex GB-14
S/S 321 spiral wound with
graphite filler
Chrome moly. alloy B16
Carbon or stainless steel
Chrome moly alloy
Stainless steel
Stainless steel, ball 58Rc min.
Stainless steel
Reboilers, purifiers, vacuum
pans, heat exchangers,
evaporators, feed water
heaters, digesters,
desuperheaters, steam
separators, flash tanks, large
autoclaves, steam catapult
service on U.S. Navy aircraft
carriers and other large
capacity applications.
G
CONNECTIONS
Type SpF0-7 (F22)
●●Screwed ●●Socketweld
●●Buttweld
●●Flanged
ENGINEERING DATA
PreSSUre
range (1)
TyPe
psi/bar
PMO
MaTerial
psi / bar
MaX
TeMP
OriFiCe
in/mm
˚F/˚C
MaX
CaPaCiTy
TyPe
PreSSUre
range
PMO
psi / bar
psi/bar
lb/hr/kg/hr
MaX
TeMP
MaTerial
MaX
CaPaCiTy
OriFiCe
in/mm
˚F/˚C
lb/hr/kg/hr
38,000
10-200
200
10-200
200
17,000
SPF4
17,272
0.69-14
14
0.69-14
14
7,727
200-350
350
19,000
200-350
350
43,000
SPF1
SPF5
7/8
14-24
24
8,636
14-24
24
19,545
1050
1 3/8
1050
F22
F22
35
565
565
22
350-600
600
22,000
350-600
600
49,000
SPF2
SPF6
24-42
42
10,000
24-42
42
22,272
600-1500
1500
27,000
600-1500
1500
63,000
SPF3
SPF7
42-103
103
12,273
42-103
103
28,636
(1) Pressure range indicated in the above table is the preferred operating range, PMA = Maximum allowable pressure:
2600psi@100˚F (179bar@38˚C)
however the trap is functional from 10psi to its maximum operating pressure. TMA = Maximum allowable temperature: 1050˚F (565˚C)
Maximum cold hydrostatic test pressure: 3900psi (269bar)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure:
(See Table)
DIMENSIONS & wEIGHTS
SPF0
Size
TyPe
B
A
in/mm
SPF
0,1,2,3
1
25
1 1/2
40
SPF
4,5,6,7
1 1/2
40
2
50
a
FaCe TO FaCe
FlangeD
SCR/SW BW
200
350 600
7 3/4
13 3/4 10 3/4
11
11
197
349
273
279 279
8 3/4
222
14 3/4
375
12
305
Differential Pressure bar
3.5
6
10
21
42
64
12
305
1500
12 3/4
324
14 1/4
362
5 1/8
130
5 1/2
140
105
170
80,000
0
70,000
4545
7000
3200
700
100
500
1000
3000
24
103
138
172
81
37
207
538
482
371
SUPERHEATED STEAM
316
500
260
Steam saturation
curve
400
204
300
149
200
93
0
Differential Pressure psi
Maximum cold water capacity x 3.5
Pressure bar.g
600
100
50
100
45
0
SPF1500
,3
1,2
10,000
10
69
31
427
SPF600
10,000
F0,
67
30
Not recommended for
use in this region
SPF350
30,000
SP
1500
64
29
565
SPF200
15,000
Temperature °F
20,000
5
20,000
FlangeD
350
600
53
56
24
25
800
25,000
,6,7
69
900
30,000
60,000
50,000
34.5
1000
Capacity kg/h
Capacity lb/h
100,000
90,000
80,000
70,000
F4,
200
48
22
1050
60,000
50,000
45,000
40,000
35,000
SP
55
25
lb/kg
PReSSuRe / TemPeRaTuRe LimiTS
200,000
40,000
50
23
WeighT
The performance graph indicates the continuous discharge capacities of
condensate per hour at various pressure differentials across the trap.
COnDenSaTe CaPaCiTy
0.69
12
305
C
B
CenTer CenTer
TO
TO
SCR/SW BW
TOP
BOTTOM
4 7/8
5 3/16
35
39
124
132
16
18
500
1000
1500
Temperature °C
C
38
2000
2500
0
3000
Pressure psi.g
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 24
9/1/09 4:34:59 PM
VELAN hIgh CAPACItY PIstON OPERAtEd stEAM tRAP
C
H
J
B
F
E
pART
A Body
B Cover
C Bimetal element
D
I
A
K
L
F
D
psi/bar
10-200
(0.69-14)
200-600
(14-42)
600-1500
(42-103)
200
(14)
600
(42)
1500
(103)
psi/bar
MaX
TeMP
MaTerial
E
F
H
I
J
k
L
M
Cover stud
Cover nut
Strainer
Piston cage unit
Pilot valve
Blowdown plug
Bottom plug
Temp controller
OriFiCe
in/mm
˚F/˚C
850(1)
454
WCB
Gasket
●●Screwed ●●Socketweld
ENGINEERING DATA
PMO
D
MATERIALS
Cast steel WCB
Same as body material
Truflex GB-14
S/S 321 spiral wound with
graphite filler
Chrome moly.alloy B7
Carbon steel 2H
Stainless steel
Stainless steel
Stainless steel, ball 58Rc min.
Carbon steel
Stainless steel
Stainless steel
CONNECTIONS
Type Sp6, 7, & 8 (cast)
PreSSUre
range
AppLICATIONS
STANDARD MATERIALS
●●Buttweld
Reboilers, purifiers,
vacuum pans, heat
exchangers, evaporators,
feed water heaters,
digesters, desuperheaters,
steam separators, flash
tanks, large autoclaves,
steam catapult service on
U.S. Navy aircraft carriers
and other large capacity
applications.
●●Flanged
MaX
CaPaCiTy
SP 6 & 7
PMA = Maximum allowable pressure:
1250psi@100˚F (86bar@38˚C)
Maximum cold hydrostatic test pressure: 1875psi (129bar)
90,000
40,909
130,000
59,090
160,000
72,727
SP 8
PMA = Maximum allowable pressure:
2000psi@100˚F (138bar@38˚C)
Maximum cold hydrostatic test pressure: 3000psi (207bar)
TMA = Maximum allowable temperature: 800˚F (427˚C)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure:
(See Table)
lb/hr/kg/hr
2
51
(1) Permissible, but not recommended for prolonged use above 800˚F (427˚C).
(2) Pressure range indicated in the above table is the preferred operating range, however the trap is functional from 10psi to its maximum operating pressure.
DIMENSIONS & wEIGHTS
Clearance for Strainer
Removal:
SP 12 in (305 mm) min.
a
WeighT
C
B
lb/kg
FaCe TO FaCe
CenTer CenTer
FlangeD
TO
TO
SCR/SW
BW
SCR/SW BW
TOP
200
350 1500 BOTTOM
200 600 & 1500 200 600 &1500
118
123
54
56
15
21
381
533
18
19
22
9 1/8
4 1/4
115
120
120
125
457
483 559
232
108
52
55
55
57
16
22
122
127
406
559
56
58
Size
TyPe
in/mm
C
B
2
50
2 1/2
65
3
80
SP
6,7,8
A
COnDenSaTe CaPaCiTy
0.69
Differential Pressure bar
3.5
6
10
21
42
64
FlangeD
600 &1500
170
77
192
87
216
98
The performance graph indicates the continuous discharge capacities of
condensate per hour at various pressure differentials across the trap.
105
170
PReSSuRe / TemPeRaTuRe LimiTS
200,000
80,000
Pressure bar.g
100,000
90,000
80,000
70,000
0
60,000
50,000
45,000
40,000
35,000
7,8
6,
SP
850
15,000
30,000
Not recommended for
use in this region
600
500
400
50
100
500
Differential Pressure psi
Maximum cold water capacity x 3.5
1000
3000
0
93
Trap shell
Pressure/temperature
curve
100
10
149
SP8
SP7
SP6
7000
3200
0
500
1000
316
204
SP8
200
4545
371
260
Steam saturation
curve
300
10,000
172
427
SP6 & 7
10,000
20,000
138
454
SUPERHEATED STEAM
Temperature °F
20,000
40,000
103
Not recommended for
prolonged use above 800°F
700
Capacity kg/h
25,000
69
800
30,000
60,000
50,000
34.5
Temperature °C
70,000
Capacity lb/h
200
139
63
151
69
155
70
1500
Pressure psi.g
2000
38
0
2500
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 25
25
9/1/09 4:35:00 PM
VELAN PIPINg kINg PACkAgE uNIts
Velan forged Piping King automatic condensate drain units
a unique method in steam trap piping
The Piping King package unit fitted with a bypass, enables
the steam trap to be isolated from the system allowing
routine maintenance to be carried out.
Inclined Bonnetless
Globe & Stop Check Valve
THE UNIT CONSISTS OF:
●● The unique patented universal steam trap with
integral strainer and check valve
Bypass
Steam Trap
●● Two high-quality bonnetless forged steel special stop
check globe valves mounted on either side of the trap.
The valves are connected by the bypass pipe, enabling
the steam trap to be isolated while the steam flow is
maintained.
Piping King units are used extensively in power stations
marine and similar applications where continuous operation
is essential during routine maintenance. (See page 28, 29 for details.)
Velan Piping Kings provide substantial savings,
in component parts & installation costs
CONvENTIONAL UNIT wITH
BYpASS (3 vALvES) AND BUCkET TRAp
8 Hours
70 Minutes
19
20
18
21
15
14
22
vELAN pIpING kING UNIT wITH
BYpASS (2 vALvES ONLY)
5
17
16
2
Check Valve
3
1
12
23
11
4
10
Strainer
1
2
6
Bucket trap
5
3
4 6
5
9
1
7 8
3
6 units - 23 Welds
1
3
1
1
23
26
Steel 3/4” bucket steam trap
Forged steel valves
Steel strainer 3/4”
Steel check valve 3/4”
Welded joints (6 hours)
2 Elbows 3/4” (s.w.)
3 Tees 3/4” (s.w.)
2 Unions 3/4”
Fitting time (2 hours)
4
2
1 unit - 5 Welds
1
5
Velan Piping King 3/4” Type NV-BY
Welded joints (1 hour)
Fitting time (10 minutes)
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 26
9/1/09 4:35:01 PM
hOw It wORks
Valves on Backseats,
Bypass Closed
1. AUTOMATIC STEAM TRAp
OpERATION
Inlet valve and outlet valve both in top, closed
position to provide double protection against
leakage through the bypass.
Inlet
Outlet
Position of valves
Trap closed
Bypass closed
2. COMpLETE SHUTOFF - NO FLOw
TRAp ISOLATED FOR SERvICE
Inlet
Outlet
Inlet valve in bottom position, outlet valve in
top position. The trap is now sealed off by the
inlet valve and the bypass is closed by the outlet
valve. The valve is protected from back-pressure
by the check valve portion of the outlet valve.
Check valve closed by
by back pressure if any
Position of valves
3. BYpASS OpEN - FULL FLOw
TRAp ISOLATED FOR SERvICE
pREFERRED SERvICE pOSITION
Bypass open
Trap isolated
Both inlet valve and outlet valves in bottom
position to seal off the trap against flow and
back-pressure.
Trap is isolated and ready for service.
Inlet
Outlet
Trap isolated
Position of valves
Bypass open
Bypass open
4. THROTTLED BY-pASSING - TRAp
ISOLATED FOR SERvICE
Bypass throttled
Inlet valve in bottom position, outlet valve in
intermediate position. The trap is sealed off by
the inlet valve and flow through the bypass is
restricted by the position of the outlet valve. The
floating check valve of the outlet valve protects
the trap from back pressure.
Inlet
Trap Isolated bypass open
Outlet
Check valve closed by
line pressure through bypass
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 27
27
9/1/09 4:35:06 PM
VELAN PIPINg kINg PACkAgE uNIts
TS-v-BY, TSF-v-BY & SF-v-BY
ENGINEERING DATA
TyPe
PreSSUre
range (2)
OriFiCe
in/mm
psi / bar
TS-V-By
(1)
TSF-V-By
(1)
SF-V-By
(1)
3/8
0-120
0-8
120-250
8-17
9.5
5/16
8
lb/h kg/h
1,650
750
1,500
682
250-300
17-21
5/16
8
1,700
773
0-200
0-14
3/8
9.5
2,000
909
200-485
0-33.5
1/4
1,400
636
0-50
0-3.5
3/4
3,250
1,477
50-150
3.5-10.4
1/2
3,250
1,477
1/2
4,500
2,045
3/8
3,100
1,409
5/16
2,600
1,182
6.5
19
12.7
150-300
10.4-21
12.7
300-400
21-28
9.5
400-600
280-42
8
C
MaX
CaPaCiTy
Material and maximum temperature:
(1) A105, max. temp. 850°F (454°C), which is
permissible, but not recommended for prolonged
use above 800°F (426°C).
(2) Pressure range indicated in the above table is
the preferred operating range, however the trap
is functional from 0psi to its maximum operating
pressure.
B
A
DIMENSIONS & wEIGHTS
TyPe
a
C
B
FaCe TO FaCe
CenTer TO CenTer
SCR/
TO TOP
BW Flg BOTTOM
SW
Size
iN/mm
WeighT
LB/kg
SCR/
SW
BW
Flg
3/8
TS-V-By
11 1/4
286
17 1/4
438
151/4
387
2
50
7 3/4
197
17
7.5
18
8
24
11
11 5/8
295
17 5/8
448
155/8
397
2
50
7 3/4
197
29
13
30
14
35
16
1/2
13 3/8
340
19 3/8 17 1/8
492
435
2 1/4
57
8 9/16
217
3/4
20
14 5/8
371
20 5/8 18 3/8
524
467
2 1/4
57
8 9/16
217
40
18
42
19
48
22
1
25
14 5/8
371
20 5/8 18 3/8
524
467
2 1/4
57
8 9/16
217
1/2
13 3/8
340
19 3/8 17 3/8
492
441
2
50
7 3/4
197
3/4
20
13 3/8
340
19 3/8 17 3/8
492
441
2
50
7 3/4
197
40
18
42
19
48
22
1
25
14 5/8
371
20 5/8 18 5/8
524
473
2 1/4
57
8 9/16
217
1/2
3/4
20
1/2
TSF-V-By
15
3/4
20
15
SF-V-By-50
SF-V-By-150
SF-V-By-300
SF-V-By-400
SF-V-By-600
15
SSF-v-BY
ENGINEERING DATA
TyPe
PreSSUre
range
psi / bar (1)
lb/h kg/h
SSF-V-F-200
0-125
0-8.5
125-200
8.5-14
1
25
7/8
22
5,750
2,608
6,400
2,903
SSF-V-F-400
200-400
14-28
9/16
5,300
2,409
SSF-V-F-600
400-600
28-42
1/2
5,200
2,360
SSF-V-F-125
14
12.7
Material and maximum temperature:
WCB, max. temp. 850ºF (454ºC),which is permissible,
but not recommended for prolonged use above
800°F (426°C).
(1) Pressure range indicated in the above table is
the preferred operating range, however the trap
is functional from 0psi to its maximum operating
pressure.
28
C
MaX
OriFiCe
CaPaCiTy
in/mm
B
A
DIMENSIONS & wEIGHTS
TyPe
SSF-V-By-125
SSF-V-By-200
SSF-V-By-400
SSF-V-By-600
Size
in/mm
2
50
1 1/2
40
2
50
a
C
B
FaCe TO FaCe
CenTer TO CenTer
SCR/
TO TOP
BW Flg BOTTOM
SW
27
33
31
5 3/8
16 11/16
686
838
787
137
424
25
635
31
29
5 3/8
15 9/16
787
737
137
395
25
635
WeighT
lb/kg
SCR/
SW
198
90
119
54
BW
Flg
198
90
200
91
123
56
146
66
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 28
9/1/09 4:35:06 PM
VELAN PIPINg kINg PACkAgE uNIts
N-v-BY-150, N-v-BY-300,
N-v-BY-675, N-v-BY-900,
N-v-BY-1500, N-v-BY-2500,
N-v-BY-2600
Also available with Velan
Power Ball Valve:
C
●● Two isolating
ENGINEERING DATA
TyPe
n-V-By-150
(1)(2)(4)
n-V-By-300
(1)(2)(4)
n-V-By-675
(1)(2)(4)
n-V-By-900
(1)(2)(4)
n-V-By-1500
(1)(2)(4)
n-V-By-2500
(2)
n-V-By-2600
(3)
●● Three bypass valves
B
PreSSUre
MaX.
range OriFiCe CaPaCiTy
psi/bar
in/mm lb/h kg/h
0-150
0-10.5
150-300
10.5-21
300-675
21-46.5
675-900
46.5-62
900-1500
62-103
500-2500
34.5-172
500-2600
34.5-179
1/2
12.7
5/16
8
1/4
6.4
5/16
8
2,800
1,272
3,500
1,590
2,900
1,315
1,850
8,41
2,100
955
955
2,182
4,900
2,227
Material and maximum temperature:
(1) A105/WCB, max. temp. 850°F (454°C) which is
permissible, but not recommended for prolonged use
above 800°F (426°C).,
(2) F22, max. temp. 1,050°F (565°C),
(3) F91, max. temp. 1,100°F (593°C).
(4) Pressure range indicated in the above table is
the preferred operating range, however the trap is
functional from 0psi to its maximum operating pressure.
A
DIMENSIONS & wEIGHTS
TyPe
Size
in/mm
1/2
15
3/4
20
1
25
1/2
15
3/4
20
1
25
n-V-By-675
n-V-By-900
n-V-By-1500
n-V-By-2500
n-V-By-2600
a
B
C
WeighT
FaCe TO FaCe
CenTer TO CenTer
lb/kg
SCR/SW BW FLg BOTTOM TO TOP SCR/SW BW
141/2
368
15 3/4
400
18 5/8
473
18 1/2
470
21 3/8
543
24
610
201/2
521
213/4
552
245/8
625
241/2
622
273/8
695
30
762
181/2
470
201/4
514
231/8
587
24
610
267/8
683
291/2
749
2
50
21/4
57
211/16
68
27/8
73
3
76
41/4
108
73/4
197
89/16
217
111/2
292
91/8
232
121/4
311
161/2
419
36
16
57
26
69
31
96
43
120
54
170
77
39
18
60
27
72
33
100
45
125
57
175
79
FLg
42
19
63
29
75
34
110
50
140
63
190
86
SpF0-v-BY TO SpF7-v-BY
Sp6-v-BY TO Sp8-v-BY
C
ENGINEERING DATA
TyPe
SPF0-V-By
(1)(2)
SPF1-V-By
(1)(2)
SPF2-V-By
(1)(2)
SPF3-V-By
(1)(2)
SPF4-V-By
(1)
SPF5-V-By
(1)
SPF6-V-By
(1)
SPF7-V-By
(1)(3)
SP6-V-By
(1)
SP7-V-By
(1)
SP8-V-By
(1)
PreSSUre
MaX.
range OriFiCe CaPaCiTy
psi/bar (3) in/mm lb/h kg/h
10-200
0.69-14
200-350
14-24
350-600
24-42
600-1500
42-103
10-200
0.69-14
200-350
14-24
350-600
24-42
600-1500
42-103
10-200
0.69-14
200-600
14-42
600-1500
42-103
7/8
22
1 3/8
35
2
51
17,000
7,727
19,000
8,636
22,000
10,000
27,000
12,273
38,000
17,272
43,000
19,545
49,000
22,272
63,000
28,636
90,000
40,909
130,000
59,090
160,000
72,727
Material and maximum temperature:
(1) A105/WCB, max. temp. 850°F (454°C) which is
permissible, but not recommended for prolonged use
above 800°F (426°C).,
(2) F22, max. temp. 1,050°F (565°C),
(3) Pressure range indicated in the above table is
the preferred operating range, however the trap
is functional from 10psi to its maximum operating
pressure.
B
A
DIMENSIONS & wEIGHTS
TyPe
SPF0-V-By
SPF1-V-By
SPF2-V-By
SPF3-V-By(1)
SPF4-V-By
SPF5-V-By
SPF6-V-By
SPF7-V-By(2)
SP6-V-By
SP7-V-By
SP8-V-By(3)
Size
in/mm
1
25
11/2
40
11/2
40
2
50
2
50
21/2
65
3
80
a
B
C
FaCe TO FaCe
CenTer TO CenTer
SCR/SW BW FLg
BOTTOm TO TOP
191/8
486
21 3/4
552
22 3/4
578
24 3/4
629
32
813
38
965
38
965
251/8
638
273/4
705
283/4
730
303/4
781
38
965
38
965
38
965
231/8(1)
587
253/4(1)
654
263/4(2)
679
283/4(2)
730
36(3)
914
38(3)
965
38(3)
965
211/16
68
53/8
137
53/8
137
53/8
137
111/2
292
159/16
395
159/16
395
1611/16
424
53/8
137
1611/16
424
WeighT
lb/kg
SCR/SW
BW
FLg
90
41
93
42
118
63
167
75
170
77
217
98
275
125
275
125
286
130
(1) For SPF3-V-BY with Flanged Connection, A (face to face) for 1” is 23 5/8” (600 mm)
and for 1 1/2” is 26 1/4” (669 mm).
(2) For SPF7-V-BY with Flanged Connection, A (face to face) for 1 1/2” is 27 1/4” (692 mm)
and for 2” is 31 3/4” (806 mm).
(3) For SP8-V-BY with Flanged Connection, A (face to face) is 39” (991 mm) for all sizes.
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 29
29
9/1/09 4:35:07 PM
VELAN MONOVALVE FLOAt BIMEtALLIC stEAM tRAPs
type MFt/MFts for positive drainage of unit heaters
and process equipment
A complete unit: built-in strainer,
check valve, air vent and
optional bypass shut-off
Type MFT5/MFTS
Type MFT0
Type MFT1, 2, 3 & 4
DESIGN FEATURES
●● positive closing and condensate drainage
(E) Float
(C) Bimetal element
The bimetallic element is a function of the saturated
steam curve (pages 4 and 5) and it’s sensitivity to the
temperature change assures an immediate reaction
to both steam and condensate for the entire pressure
range. At saturated steam temperature the valve is
closed as on a standard bimetallic steam trap, however,
in this type any condensate build-up even at saturated
steam temperature is discharged at the same rate. As it
reaches the trap, the float becomes buoyant and opens
the valve mechanically (see page 7).
●● Stainless steel float & trim
●● Simple installation
Multiple inlet and outlet connections facilitate
installation.
●● Integral strainer
Stainless steel screens are integral to protect the trap
operating mechanism from damage by dirt or scale.
No extra fittings or installation costs are required.
Free strainer area minimum 5 to 1.
Perforation is 0.031” (0.8 mm).
●● Integral check valve operation
The main valve acts as a check valve preventing back
flow.
●● Stainless steel pivots
Assure adequate protection against wear.
●● Seat (J) Stellite faced to increase resistance to the high
(I) Ball valve
●● Guaranteed against water hammer.
The down-stream valve acts as a release valve on the
excess water pressure without damage to internal parts.
●● Freezeproof installation
without insulation – complete drainage when cold.
●● Other options include: NPT blow down plug, strainer
blowdown valve and Piping King Units.
degree of wear through velocity of flow, dirt and scale.
30
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 30
9/1/09 4:35:10 PM
VELAN MONOVALVE FLOAt BIMEtALLIC stEAM tRAPs
F
C
B
D
AppLICATIONS
STANDARD MATERIALS
E
pART
A Body
B Cover
C Bimetal element
D Bimetal holder
E Float
H
K
F
L
G
H
I
J
k
L
J
I
A
MATERIALS
Cast iron Gr.250
Same as body material
Truflex GB-14
Stainless steel
Stainless steel
Stainless steel with
Cover gasket
non-asbestos filler
Cover screw
High tensile steel Gr. S
Strainer
Stainless steel
Stem and ball
Stainless steel, ball 58Rc
Seat
SS hardfaced with Stellite 6
Self lock adjusting nut Stainless steel
Pivot plug
Stainless steel
Where positive drainage is
essential and condensate
back-up cannot be
tolerated.
●●Unit heaters,
●●Laundry presses,
●●Calorifiers,
●●Ironers,
●●Calenders,
●●Drying cylinders and
other applications where
condensate has to be
discharged at near steam
temperature.
NOTE: Part ‘G’ is not shown for clarity
Type MFT0
CONNECTIONS
●●Screwed
ENGINEERING DATA
PreSSUre
range (1)
PMO
MaTerial
psi/bar
psi/bar
0-125
0-8.5
MaX
TeMP
in/mm
˚F/˚C
125
8.5
CAST IRON
Gr.250
MaX
CaPaCiTy
OriFiCe
7/32
428
220
PMA = Maximum allowable pressure:
lb/hr/kg/hr
1,650
750
5.5
260psi@100˚F (18bar.g@38˚C)
TMA = Maximum allowable temperature: 428˚F (220˚C)
Maximum cold hydrostatic test pressure: 400psi.g (27.5bar)
TMO = Maximum operating temperature = TMA
(1) Pressure range indicated in the above table is the preferred operating range,
however the trap is functional from 0psi to its maximum operating pressure.
PMO = Maximum operating pressure:
(See Table)
DIMENSIONS & wEIGHTS
A
Size
in/mm
B
3/4
1/2
C
15
D
20
a
heighT
B(1)
CenTer TO FaCe
C(2)
CenTer TO TOP
D
lengTh
WeighT
6 1/8
156
4 3/8
111
1 1/8
29
6 3/4
171
8.75
4
lb/kg
(1) Center of inlet to outlet face (2) Center of outlet to inlet face
COnDenSaTe CaPaCiTy
Differential Pressure bar
0.35
0.69
3.5
6
10
The performance graph indicates the continuous
discharge capacities of condensate per hour at various
pressure differentials across the trap.
21
20,000
9000
5000
10,000
PReSSuRe / TemPeRaTuRe LimiTS
4000
3000
5000
428
400
T0
500
MF
200
1
5
300
125
10
50
Differential Pressure psi
Maximum cold water capacity x 3.5
100
300
Pressure bar.g
13.8
20.7
220
204
SUPERHEATED STEAM
Not recommended for
use in this region
300
149
Steam saturation
curve
200
93
125PSI
500
1000
6.9
400
Temperature °F
1000
Capacity kg/h
Capacity lb/h
2000
0
200
100
100
0
38
0
100
Pressure psi.g
200
300
0
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 31
Temperature °C
0.069
31
9/1/09 4:35:11 PM
VELAN MONOVALVE FLOAt BIMEtALLIC stEAM tRAPs
A
H
F
K
E
B
AppLICATIONS
STANDARD MATERIALS
pART
A Body
B Cover
C Bimetal element
D Bimetal holder
E Float
MATERIALS
Cast iron Gr.250
Same as body material
Truflex GB-14
Stainless steel
Stainless steel
Stainless steel with
Cover gasket
non-asbestos filler
Cover screw
High tensile steel Gr. S
Strainer
Stainless steel
Stem and ball
Stainless steel, ball 58Rc
Seat
SS hardfaced with Stellite 6
Self lock adjusting nut Stainless steel
Pivot plug
Stainless steel
F
G
H
I
J
k
L
Type MFT1
I
J
L
Where positive drainage is
essential and condensate
back-up cannot be tolerated.
●●Unit heaters,
●●Laundry presses,
●●Calorifiers,
●●Ironers,
●●Calenders,
●●Drying cylinders and
other applications where
condensate has to be
discharged at near steam
temperature.
NOTE: Part ‘G’ is not shown for clarity.
C D
CONNECTIONS
ENGINEERING DATA
PreSSUre
range (1)
psi / bar
0-15
0-1
15-50
1-3.5
50-125
3.5-8.5
15
1
50
3.5
125
8.5
psi/bar
PMO
●●Screwed
MaTerial
MaX
TeMP
MaX
CaPaCiTy
OriFiCe
in/mm
˚F/˚C
lb/hr/kg/hr
3/8
9.5
CAST IRON
Gr.250
428
220
5.5
260psi@100˚F (18bar.g@38˚C)
TMA = Maximum allowable temperature: 428˚F (220˚C)
3,250
1,477
1,250
568
1,700
772
7/32
PMA = Maximum allowable pressure:
Maximum cold hydrostatic test pressure: 400psi.g (27.5bar)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure:
(See Table)
(1) Pressure range indicated in the above table is the preferred operating range, however the trap is functional from 0psi to its maximum operating pressure.
DIMENSIONS & wEIGHTS
Size
A B
in/mm
3/4
1/2
C
15
D
a(1)
FaCe TO FaCe
B(2)
CenTer TO CenTer
C(3)
CenTer TO FaCe
D
lengTh
WeighT
6 5/8
168
3 15/16
100
1 3/8
35
8 5/16
211
12
5.5
1
25
20
lb/kg
(1) Vertical connection. (2) Horizontal connection. (3) Center of vertical outlet to face of horizontal outlet.
COnDenSaTe CaPaCiTy
0.069
0.35
Differential Pressure bar
0.69
3.5
6
10
The performance graph indicates the continuous
discharge capacities of condensate per hour at various
pressure differentials across the trap.
21
20,000
9000
5000
4000
PReSSuRe / TemPeRaTuRe LimiTS
3000
Pressure bar.g
5000
500
400
6.9
300
10
Differential Pressure psi
Maximum cold water capacity x 3.5
32
50
100
149
Steam saturation
curve
Not recommended for
use in this region
100
38
100
0
0
300
125PSI
200
15PSI
5
220
204
93
500
1
20.7
200
300
200
13.8
SUPERHEATED STEAM
50PSI
1000
428
400
0
Temperature °F
1000
Capacity kg/h
Capacity lb/h
2000
Temperature °C
10,000
100
200
Pressure psi.g
300
0
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 32
9/1/09 4:35:12 PM
VELAN MONOVALVE FLOAt BIMEtALLIC stEAM tRAPs
A
H
F
K
E
AppLICATIONS
STANDARD MATERIALS
B
pART
A Body
B Cover
C Bimetal element
D Bimetal holder
E Float
F
G
H
I
J
k
L
MATERIALS
Cast iron Gr.250
Same as body material
Truflex GB-14
Stainless steel
Stainless steel
Stainless steel with
Cover gasket
non-asbestos filler
Cover screw
High tensile steel Gr. S
Strainer
Stainless steel
Stem and ball
Stainless steel, ball 58Rc
Seat
SS hardfaced with Stellite 6
Self lock adjusting nut Stainless steel
Pivot plug
Stainless steel
Where positive drainage is
essential and condensate
back-up cannot be tolerated.
●●Unit heaters,
●●Laundry presses,
●●Calorifiers,
●●Ironers,
●●Calenders,
●●Drying cylinders and
other applications where
condensate has to be
discharged at near steam
temperature.
NOTE: Part ‘G’ is not shown for clarity.
Type MFT2
I
J
L
CONNECTIONS
C D
ENGINEERING DATA
PreSSUre
range (1)
psi/bar
0-15
0-1
15-50
1-3.5
50-125
3.5-8.5
125-200
8.5-14
15
1
50
3.5
125
8.5
200
14
psi/bar
PMO
●●Screwed
MaTerial
MaX
TeMP
OriFiCe
in/mm
˚F/˚C
MaX
CaPaCiTy
lb/hr/kg/hr
1/2
CAST IRON
Gr.250
7,000
3,182
3,200
1,455
2,600
1,182
2,000
909
12.7
5/16
8
1/4
6.4
7/32
5.5
428
220
PMA = Maximum allowable pressure:
260psi@100˚F (18bar.g@38˚C)
TMA = Maximum allowable temperature: 428˚F (220˚C)
Maximum cold hydrostatic test pressure: 400psi.g (27.5bar)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure:
See Table)
(1) Pressure range indicated in the above table is the preferred operating range, however the trap is functional from 0psi to its maximum operating pressure.
DIMENSIONS & wEIGHTS
a(1)
FaCe TO FaCe
B(2)
CenTer TO CenTer
C(3)
CenTer TO FaCe
D
lengTh
WeighT
1
25
7 11/16
195
4 3/4
121
1 7/16
37
9 3/8
238
15
7
1 1/2
40
8
203
4 1/2
114
1 3/4
44
10 3/8
264
17
8
Size
in/mm
3 /4
20
A B
1 1/4
32
C
D
(1) Vertical connection. (2) Horizontal connection. (3) Center of vertical outlet to face of horizontal outlet.
COnDenSaTe CaPaCiTy
0.069
lb/kg
0.35
Differential Pressure bar
0.69
3.5
6
10
The performance graph indicates the continuous
discharge capacities of condensate per hour at various
pressure differentials across the trap.
21
20,000
9000
PReSSuRe / TemPeRaTuRe LimiTS
4000
3000
5000
428
400
500
SUPERHEATED STEAM
300
50
Differential Pressure psi
Maximum cold water capacity x 3.5
100
300
149
100
0
0
100
200PSI
38
125PSI
100
15PSI
10
Not recommended for
use in this region
Steam saturation
curve
220
204
200
300
5
20.7
93
500
1
13.8
200
400
200
Pressure bar.g
6.9
50PSI
1000
Temperature °F
1000
Capacity kg/h
Capacity lb/h
2000
0
200
Pressure psi.g
300
0
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 33
Temperature °C
5000
10,000
33
9/1/09 4:35:14 PM
VELAN MONOVALVE FLOAt BIMEtALLIC stEAM tRAPs
A
H
F
K
E
B
pART
A Body
B Cover
C Bimetal element
D Bimetal holder
E Float
Type MFT3
I
J
L
C D
psi/bar
0-15
0-1
15-50
1-3.5
50-125
3.5-8.5
125-200
8.5-14
15
1
50
3.5
125
8.5
200
14
PMO
psi/bar
MaTerial
F
Cover gasket
G
H
I
J
k
L
Cover screw
Strainer
Stem and ball
Seat
Self lock adjusting Nut
Pivot plug
MaX
TeMP
Where positive drainage is
essential and condensate backup cannot be tolerated.
●●Unit heaters,
●●Laundry presses,
●●Calorifiers,
●●Ironers,
●●Calenders,
●●Drying cylinders and
other applications where
condensate has to be
discharged at near steam
temperature.
Stainless steel with
non-asbestos filler
High tensile steel Gr. S
Stainless steel
Stainless steel, ball 58Rc
SS hardfaced with Stellite 6
Stainless steel
Stainless steel
CONNECTIONS
in/mm
lb/hr/kg/hr
5/8
12,000
5,455
8,000
3,636
4,500
2,045
3,200
1,455
16
7/16
11
5/16
8
1/4
6.4
428
220
●●Screwed
MaX
CaPaCiTy
OriFiCe
˚F/˚C
CAST IRON
Gr.250
MATERIALS
Cast iron Gr.250
Same as body material
Truflex GB-14
Stainless steel
Stainless steel
NOTE: Part ‘G’ is not shown for clarity
ENGINEERING DATA
PreSSUre
range (1)
AppLICATIONS
STANDARD MATERIALS
PMA = Maximum allowable pressure:
260psi@100˚F (18bar.g@38˚C)
TMA = Maximum allowable temperature: 428˚F (220˚C)
Maximum cold hydrostatic test pressure: 400psi.g (27.5bar)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure:
(See Table)
(1) Pressure range indicated in the above table is the preferred operating range, however the trap is functional from 0psi to its maximum operating pressure.
DIMENSIONS & wEIGHTS
a (1)
FaCe TO FaCe
Size
in/mm
A B
1/2
C
D
B(2)
CenTer TO CenTer
C(3)
CenTer TO FaCe
1/2
D
lengTh
3/4
3/4
WeighT
lb/kg
1
40
9
229
5
140
1
44
12
324
33
15
2
50
10 1/4
260
5 5/8
143
2 1/4
57
13 1/2
343
35
16
(1) vertical connection (2) horizontal connection (3) Center of vertical outlet to face of horizontal outlet
The performance graph indicates the
continuous discharge capacities of
condensate per hour at various pressure
differentials across the trap.
COnDenSaTe CaPaCiTy
Differential Pressure bar
0.69
3.5
6
10
21
9000
PReSSuRe / TemPeRaTuRe LimiTS
5000
10,000
4000
Pressure bar.g
3000
428
400
5000
500
6.9
300
38
Differential Pressure psi
Maximum cold water capacity x 3.5
34
50
100
100
0
0
125PSI
100
15PSI
10
149
200
300
5
Not recommended for
use in this region
Steam saturation
curve
220
204
93
500
1
20.7
200
400
200
13.8
SUPERHEATED STEAM
50PSI
1000
Temperature °F
1000
Capacity kg/h
Capacity lb/h
2000
0
100
Temperature °C
0.35
200PSI
0.069
20,000
200
300
0
Pressure psi.g
300
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 34
9/1/09 4:35:15 PM
VELAN MONOVALVE FLOAt BIMEtALLIC stEAM tRAPs
A
H
F
K
E
AppLICATIONS
STANDARD MATERIALS
B
pART
A Body
B Cover
C Bimetal element
D Bimetal holder
E Float
MATERIALS
Cast iron Gr.250
Same as body material
Truflex GB-14
Stainless steel
Stainless steel
Stainless steel with
Cover gasket
non-asbestos filler
Cover screw
High tensile steel Gr. S
Strainer
Stainless steel
Stem and ball
Stainless steel, ball 58Rc
Seat
SS hardfaced with Stellite 6
Self lock adjusting nut Stainless steel
Pivot plug
Stainless steel
F
Type MFT4
I
J
L
G
H
I
J
k
L
C D
psi/bar
0-15
0-1
15-50
1-3.5
50-125
3.5-8.5
125-200
8.5-14
15
1
50
3.5
125
8.5
200
14
PMO
psi/bar
MaTerial
MaX
TeMP
in/mm
lb/hr/kg/hr
3/4
PMA = Maximum allowable pressure:
17,500
7,955
12,000
5,455
8,000
3,636
5,800
2,636
19
1/2
12.7
3/8
9.5
5/16
8
428
220
●●Screwed
MaX
CaPaCiTy
OriFiCe
˚F/˚C
CAST IRON
Gr.250
CONNECTIONS
NOTE: Part ‘G’ is not shown for clarity
ENGINEERING DATA
PreSSUre
range (1)
Where positive drainage is
essential and condensate backup cannot be tolerated.
●●Unit heaters,
●●Laundry presses,
●●Calorifiers,
●●Ironers,
●●Calenders,
●●Drying cylinders and
other applications where
condensate has to be
discharged at near steam
temperature.
260psi@100˚F (18bar.g@38˚C)
TMA = Maximum allowable temperature: 428˚F (220˚C)
Maximum cold hydrostatic test pressure: 400psi.g (27.5bar)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure: (See Table)
(1) Pressure range indicated in the above table is the preferred operating range, however the trap is functional from 0psi to its maximum operating pressure.
DIMENSIONS & wEIGHTS
A B
C
D
in/mm
Size
a (1)
FaCe TO FaCe
B(2)
CenTer TO CenTer
C(3)
CenTer TO FaCe
D
lengTh
WeighT
2
50
11
279
6 1/2
165
2 1/4
57
14 1/2
368
51
23
lb/kg
(1) vertical connection (2) horizontal connection (3) Center of vertical outlet to face of horizontal outlet
COnDenSaTe CaPaCiTy
Differential Pressure bar
0.69
3.5
6
10
The performance graph indicates the
continuous discharge capacities of
condensate per hour at various pressure
differentials across the trap.
21
9000
5000
10,000
PReSSuRe / TemPeRaTuRe LimiTS
4000
3000
Pressure bar.g
5000
500
0
6.9
300
50
Differential Pressure psi
Maximum cold water capacity x 3.5
100
300
149
38
100
0
0
125PSI
100
15PSI
10
Not recommended for
use in this region
Steam saturation curve
200
500
5
220
204
93
300
1
20.7
200
400
200
13.8
SUPERHEATED STEAM
50PSI
1000
428
400
Temperature °F
1000
Capacity kg/h
Capacity lb/h
2000
100
200
0
Pressure psi.g
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 35
Temperature °C
0.35
200PSI
0.069
20,000
35
9/1/09 4:35:16 PM
VELAN MONOVALVE FLOAt BIMEtALLIC stEAM tRAPs
A
H
F
K
E
AppLICATIONS
STANDARD MATERIALS
B
pART
A Body
B Cover
C Bimetal element
D Bimetal holder
E Float
MATERIALS
Cast iron Gr.250
Same as body material
Truflex GB-14
Stainless steel
Stainless steel
Stainless steel with nonCover gasket
asbestos filler
Cover screw
High tensile steel Gr. S
Strainer
Stainless steel
Stem and ball
Stainless steel, ball 58Rc
Seat
SS hardfaced with Stellite 6
Self lock adjusting nut Stainless steel
Pivot plug
Stainless steel
F
Type MFT5
I
J
G
H
I
J
k
L
L C D
NOTE: Part ‘G’ is not shown for clarity
ENGINEERING DATA
PreSSUre
range
psi/bar
0-15
0-1
15-50
1-3.5
50-125
3.5-8.5
15
1
50
3.5
125
8.5
psi/bar (1)
PMO
MaTerial
MaX
TeMP
in/mm
˚F/˚C
PMA = Maximum allowable pressure:
3,300
1,477
1,250
568
1,700
772
9.5
7/32
428
220
●●Screwed
lb/hr/kg/hr
3/8
CAST IRON
Gr.250
CONNECTIONS
MaX
CaPaCiTy
OriFiCe
5.5
7/32
5.5
Where positive drainage is
essential and condensate
back-up cannot be
tolerated.
●●Unit heaters,
●●Laundry presses,
●●Calorifiers,
●●Ironers,
●●Calenders,
●●Drying cylinders and
other applications where
condensate has to be
discharged at near steam
temperature.
260psi@100˚F (18bar.g@38˚C)
TMA = Maximum allowable temperature: 428˚F (220˚C)
Maximum cold hydrostatic test pressure: 400psi.g (27.5bar)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure:
(See Table)
(1) Pressure range indicated in the above table is the preferred operating range, however the trap is functional from 0psi to its maximum operating pressure.
DIMENSIONS & wEIGHTS
B
a
FaCe TO FaCe
Size
in/mm
1/2
A
3/4
15
C
SCr
C
lengTh
5 1/4
133
9 1/4
235
3 11/16
94
1
25
20
B
CenTer TO TOP
WeighT
lb/kg
SCr
12
5.5
COnDenSaTe CaPaCiTy
0.069
0.35
Differential Pressure bar
0.69
3.5
6
10
The performance graph indicates the
continuous discharge capacities of
condensate per hour at various pressure
differentials across the trap.
21
20,000
9000
PReSSuRe / TemPeRaTuRe LimiTS
5000
10,000
4000
3000
Pressure bar.g
500
0
6.9
300
10
Differential Pressure psi
Maximum cold water capacity x 3.5
36
100
149
38
100
0
0
300
125PSI
100
15PSI
1
Not recommended for
use in this region
Steam saturation
curve
200
500
50
220
204
93
300
5
20.7
200
400
200
13.8
SUPERHEATED STEAM
50PSI
1000
428
400
Temperature °F
1000
Capacity kg/h
Capacity lb/h
2000
Temperature °C
5000
100
200
Pressure psi.g
300
0
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 36
9/1/09 4:35:17 PM
VELAN MONOVALVE FLOAt BIMEtALLIC stEAM tRAPs
A
H
F
K
E
AppLICATIONS
STANDARD MATERIALS
B
pART
A Body
B Cover
C Bimetal element
D Bimetal holder
E Float
MATERIALS
Cast steel WCB
Same as body material
Truflex GB-14
Stainless steel
Stainless steel
Stainless steel with
Cover gasket
non-asbestos filler
Cover screw
Chrome Moly Alloy B7
Strainer
Stainless steel
Stem and ball
Stainless steel, ball 58Rc
Seat
SS hardfaced with Stellite 6
Self lock adjusting nut Stainless steel
Pivot plug
Stainless steel
F
G
H
I
J
k
L
Type MFTS
I
J
L C D
Where positive drainage is
essential and condensate
back-up cannot be tolerated.
●●Unit heaters,
●●Laundry presses,
●●Calorifiers,
●●Ironers,
●●Calenders,
●●Drying cylinders and
other applications where
condensate has to be
discharged at near steam
temperature.
NOTE: Part ‘G’ is not shown for clarity
CONNECTIONS
ENGINEERING DATA
PreSSUre
range
psi/bar
0-150
0-10.5
150-230
10.5-16
230-300
16-21
150
10.5
230
16
300
21
psi/bar (1)
PMO
MaTerial
MaX
TeMP
OriFiCe
in/mm
˚F/˚C
lb/hr/kg/hr
5/16
CAST
CARBON
STEEL
WCB
4,200
1,909
1,900
863
2,100
955
8
7/32
5.5
7/32
5.5
650
343
●●Screwed ●●Socketweld
●●Buttweld ●●Flanged
MaX
CaPaCiTy
PMA = Maximum allowable pressure:
320psi@100˚F (22bar.g@38˚C)
TMA = Maximum allowable temperature: 650˚F (343˚C)
Maximum cold hydrostatic test pressure: 600psi.g (41bar)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure:
(See Table)
(1) Pressure range indicated in the above table is the preferred operating range, however the trap is functional from 0psi to its maximum operating pressure.
DIMENSIONS & wEIGHTS
B
a
FaCe TO FaCe
SCR/SW
BW
Size
in/mm
A
1/2
15
C
3/4
6 1/8
156
1
25
20
Flg
9 11/16
246
B
CenTer TO TOP
C
lengTh
5 1/4
133
9 1/4
235
6
152
WeighT
lb/kg
SCR/SW
BW
Flg
18
8
20
9
30
14
COnDenSaTe CaPaCiTy
The performance graph indicates the
continuous discharge capacities of
condensate per hour at various pressure
differentials across the trap.
Differential Pressure bar
6
10
21
20,000
9000
PReSSuRe / TemPeRaTuRe LimiTS
5000
10,000
Pressure bar.g
4000
0
3000
5000
600
400
300
500
100
1
10
50
Differential Pressure psi
Maximum cold water capacity x 3.5
100
300
316
400
300
Steam saturation
curve
200
100
5
27.6
260
200
200
20.7
500
MFTS 150
500
1000
13.8
SUPERHEATED STEAM
Temperature °F
1000
Capacity kg/h
Capacity lb/h
2000
6.9
0
0
100
200
Pressure psi.g
204
149
93
300
38
400
0
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 37
Temperature °C
3.5
Not recommended for
use in this region
0.69
MFTS 300
0.35
MFTS 230
0.069
37
9/1/09 4:35:19 PM
VELAN thERMOdYNAMIC stEAM tRAPs
FORgEd RANgE
●● valve seats Stellited
Most Velan valve seats are
Stellite faced to increase
their resistance to the high
degree of wear through
velocity of flow, dirt and
scale.
Type
vTS
Type
HpTD
CAst RANgE
●● valve seats
Hardened by special
induction hardening
process with seat harder
than disc to withstand
continuous, prolonged
operation.
Type
vTDS
Type
vTD
COMMON DESIGN FEATURES
●● Stainless steel hardened floating disc,
ground and lapped with seat replaceable in line.
●● Gaskets are spiral wound, stainless steel
with graphite. Trim is stainless steel
●● Integral strainer
Stainless steel screens are integral in all three models
to protect the trap operating mechanism from damage
by dirt or scale. No extra fittings or installation costs are
required. Free strainer area minimum 5 to 1. Perforation
is 0.031” (0.8 mm).
●● Freezeproof installation
Velan traps do not require a reservoir of priming water
in the body to operate when installed vertically with
inlet on top, they drain completely when cold, and are
therefore freezeproof without insulation.
●● positive condensate drainage for process work.
●● All-position installation simplifies piping layout.
●● positive closing
Every Velan trap closes tightly on saturated steam
temperature. Positive closing for long periods on dry
superheated steam lines has enormous advantages in
power plant and marine service.
38
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 38
9/1/09 4:35:19 PM
VELAN thERMOdYNAMIC stEAM tRAPs
H
pART
A Body
B Cover
C Cover gasket
D Floating disc
E Strainer
F Strainer cover
G Strainer cover gasket
H Seat
C
D
A
E
MATERIALS
Forged carbon steel A105(1)
Same as body material
Monel
Stainless steel, hardened
Stainless steel
Same as body material
Stainless steel
Hardfaced with Stellite 6
garment presses
●● Rubber and plastic
moulding equipment
●● Sterilizers and laundry
ironers.
(1) Consult works for F11 or F316 material
G
F
ENGINEERING DATA
TyPe
PreSSUre
range
psi/bar
5-600
(0.34-41)
600
(41)
PMO
psi/bar
VTS
˚F/˚C
MaX
CaPaCiTy
850(1)
454
2,060
936
MaX TeMP
Max body design condition:
ANSI/ASME 600
PMA = Maximum allowable pressure:
1480psi.g@100˚F (102bar.g@38˚C)
TMA = Maximum allowable temperature: 800˚F (426˚C)
lb/hr/kg/hr
Maximum cold hydrostatic test pressure: 2225psi.g (153.5bar.g)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure:
(1) Permissible, but not recommended for prolonged use above 800˚F (426˚C)
(See Table)
DIMENSIONS & wEIGHTS
C
a
heighT
Size
B
in/mm
A
3/8
Clearance for Strainer Removal:
VTS 3 in (76 mm) min.
1/2
10
15
3/4
20
SCR/
SW
BW
Flg
3 3/16
81
9 3/16
233
6 1/4
159
0.69
Differential Pressure bar
3.5
6
10
21
42
69
6000
5000
WeighT
B
CenTer
TO
BOTTOM
C
CenTer
TO
TOP
SCR/
SW
BW
Flg
2 1/8
54
2 1/8
54
2
1
3
1.5
7
3
lb/kg
The performance graph indicates the
continuous discharge capacities of
condensate per hour at various pressure
differentials across the trap.
COnDenSaTe CaPaCiTy
2500
2000
PReSSuRe / TemPeRaTuRe LimiTS
1000
2000
0
850
300
500
200
100
200
60
1
10
50
100
Differential Pressure psi
Maximum cold water capacity x 3.5
500
27
1000
103
138
454
427
371
SUPERHEATED
STEAM
600
Not recommended
for use in
this region
500
400
300
200
45
100
69
700
Temperature °F
S
VT
Capacity kg/hr
400
Pressure bar.g
Not recommended for
prolonged use above 800°F
800
500
1000
34.5
100
0
0
316
260
Steam Saturation
Curve
204
93
500
149
Temperature °C
1500
Capacity lb/hr
●● Multi-platen presses,
600PSI
Type
vTS
AppLICATIONS
STANDARD MATERIALS
B
38
1000
Pressure psi.g
1500
0
2000
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 39
39
9/1/09 4:35:21 PM
VELAN thERMOdYNAMIC stEAM tRAPs
H
C
pART
F
Cover
C
Cover gasket
SS with graphite filler
D
Floating disc
Stainless steel, hardened
E
Strainer
Stainless steel
F
Strainer cover
Strainer cover
gasket
Seat
Same as body material
Stainless steel spiral wound
with non-asbestos filler
Hardfaced with Stellite 6
Body
G
E
Type
HpTD
B
MATERIALS
Forged carbon steel A105
(C.Max. 0.25)
Same as body material
A
D
A
AppLICATIONS
STANDARD MATERIALS
B
H
●● Multi-platen presses,
garment presses
●● Rubber and plastic
moulding equipment
●● Sterilizers and laundry
ironers.
CONNECTIONS:
CONNECTIONS
●●Screwed ●●Socketweld
●●Buttweld ●●Flanged
G
ENGINEERING DATA
PreSSUre
range
PMO
psi/bar
psi/bar
5-1000
(0.34-69)
1000
(69)
˚F/˚C
MaX
CaPaCiTy
800
426
5,500
2,500
MaX TeMP
MaTerial
A105
lb/hr/kg/hr
Max body design condition:
ANSI/ASME 900
PMA = Maximum allowable pressure:
2220psi.g@100˚F (153bar.g@38˚C)
TMA = Maximum allowable temperature: 800˚F (427˚C)
Maximum cold hydrostatic test pressure: 3350psi.g (230bar.g)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure:
C
(See Table)
DIMENSIONS & wEIGHTS
a
FaCe TO FaCe
SCR/SW
BW
Flg
6 1/8
12 1/8
10 1/8
155
308
257
Size
B
in/mm
A
1/2
A
Clearance for Strainer Removal:
HPTD 5 in (127 mm) min.
3/4
15
1
25
20
B
CenTer TO
BOTTOM
C
CenTer
TO TOP
4
102
2 7/8
73
WeighT
lb/kg
SCR/SW
18
8
BW
20
9
Flg
26
12
The performance graph indicates the continuous discharge capacities of
condensate per hour at various pressure differentials across the trap.
COnDenSaTe CaPaCiTy
Differential Pressure bar
3.5
6
10
21
42
69
6000
5000
2500
PReSSuRe / TemPeRaTuRe LimiTS
2000
1500
1000
TD
2000
0
HP
850
200
100
200
45
60
27
600
10
50
Maximum cold water capacity x 3.5
40
100
Differential Pressure psi
500
138
172
454
Not recommended
for use in
this region
427
371
316
260
500
400
204
Steam saturation
curve
300
100
0
1
103
SUPERHEATED
STEAM
200
100
69
149
1000PSI
300
500
700
Temperature °F
400
Capacity kg/hr
Capacity lb/hr
1000
Pressure bar.g
Not recommended for
prolonged use above 800°F
800
500
34.5
0
1000
500
1000
Temperature °C
0.69
93
38
1500
Pressure psi.g
2000
0
2500
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 40
9/1/09 4:35:22 PM
VELAN thermodynamic steam traps
A
B
C
A
B
APPLICATIONS
Standard materials
C
PART
A Body
MATERIALS
Stainless steel CA40
B
Main cover
C
Floating disc
Stainless steel, hardened
D
Strainer cover
Stainless steel CA40
E
Strainer gasket
Stainless steel 304
F
Strainer element
Stainless steel 304
E
PRESSURE
RANGE
psi/bar
5-600
(0.34-42)
600
(42)
PMO
psi/bar
VTDS
VTD
moulding equipment
ironers.
Connections:
● Screwed
D
Engineering Data
type
●● Rubber and plastic
●● Sterilizers and laundry
Type VTD (without strainer element)
F
presses, garment
presses
Stainless steel CA40
Note: Seat face – induction Hardened.
Type
VTDS
●● Multi-platen
MATERIAL
MAX
TEMP
MAX
CAPACITY
800
426
1/2 & 3/4
1600 / 727
1
2300 / 1045
˚F/˚C
S/S CA40
lb/hr/kg/hr
PMA = Maximum allowable pressure: 914psi.g@100˚F (63bar.g@38˚C)
TMA = Maximum allowable temperature: 800˚F (427˚C)
Maximum cold hydrostatic test pressure: 1375psi.g (95bar.g)
TMO = Maximum operating temperature = TMA
PMO = Maximum operating pressure: (See Table)
DIMENSIONS & WEIGHTS
type
C
A
face to face
Size
in/mm
1/2
15
B
B
VTDS
A
A
Clearance for Strainer Removal:
½ & ¾ – 3½ in (90 mm) min.
1 – 4¼ in (108 mm) min.
VTD
Differential Pressure bar
3.5
6
10
20
1
25
1/2
15
3/4
20
1
25
21
3 5/32
80
2 1/2
64
1 13/16
46
2 1/2
1.1
3 3/4
96
2 3/4
70
2 1/16
52
4 1/2
2
2 9/16
65
1 7/16
36.5
1 13/16
46
1 1/2
0.7
3 3/8
85
1 7/8
48
2 1/16
52
3 1/2
1.6
Pressure bar.g
1350
1000
2000
800
0
13.8
27.6
41.4
700
500
200
100
200
600
500
45
60
5
10
50
27
100
Differential Pressure psi
Maximum cold water capacity x 3.5
600
400
371
204
Steam saturation
curve
300
149
Trap shell
Pressure/temperature
curve
100
0
427
260
200
100
69
316
600PSI
300
55.2
Not recommended for
use in this region
SUPERHEATED STEAM
Temperature °F
¾
Capacity kg/hr
Capacity lb/hr
500
400
1
½&
lb/kg
Pressure / Temperature Limits
42
3000
1000
Weight
The performance graph indicates the continuous discharge capacities of
condensate per hour at various pressure differentials across the trap.
CONDENSATE CAPACITY
0.69
3/4
B
C
Center to bottom Center to top
0
200
400
600
800
93
38
0
1000
Pressure psi.g
---------- Pressure limit for trap type
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 41
Temperature °C
C
41
9/1/09 4:35:23 PM
VELAN COMPREssEd AIR dRAIN tRAPs
type MFA/MFAs for pneumatic use:
• power tools • blowing moulds • paint
A complete unit: built-in strainer, check valve and
air vent with dual inlet and outlet connections
H
A
F
K
B
E
M
Type
MFA0
I
In much the same way as steam, but for quite different
reasons, compressed air gives up moisture as it cools.
The act of compression raises the temperature of the air
and even when passed through an after-cooler, it still has
heat to loose before reaching the point at which it is used.
Water vapor carried in compressed air condenses and
collects in the bottom of receivers, tanks or separators,
and in low points of compressed air lines. If such
accumulations are not removed, the passing air will pick
up moisture, which may cause rusting, sticking or
spoiled work.
TYpE MFA & MFAS DESIGN FEATURES
The Velan Type MFA float trap automatically removes
accumulated water from compressed air systems.
Construction is similar to the Type MFT steam trap
except that there is no thermostatic element. A boss is
provided on top of the cover, tapped for a 3/8” (10 mm)
air circulating pipe which is necessary unless the trap is
fitted directly under and so close to the drain point that
air entering the trap can escape back through the inlet.
●● Stainless Steel Float & Trim
●● Simple Installation
Multiple inlet and outlet connections facilitate
horizontal, vertical or angle installation.
L
C D
Type MFAS
Type MFA1 & 2
COMpRESSED AIR DRAINAGE
J
●● Integral strainer
Stainless steel screens are integral to protect the trap
operating mechanism from damage by dirt or scale.
No extra fittings or installation costs are required.
Free strainer area minimum 5 to 1.
Perforation is 0.031” (0.8 mm).
●● Integral check valve operation
The main valve acts as a check valve preventing
back flow.
●● Stainless steel pivots
Assure adequate protection against wear.
●● Seat Stellite faced
to increase resistance to the high degree of wear
through velocity of flow, dirt and scale.
●● Freezeproof installation
Freezeproof without insulation – complete drainage
when cold.
AppLICATIONS
pneumatic power tool operation:
●● Air operated chucks,
●● Air operated cutters
pneumatic blowing operation:
●● Foundry mould blowing,
●● Paint shop spraying
42
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 42
9/1/09 4:35:25 PM
VELAN COMPREssEd AIR dRAIN tRAPs
STANDARD MATERIALS
3/8”
NPT
(1) MFA0: hardened seat.
0.069
bar
0.69
3.5
6
10
21
42
10,000
4000
3000
5000
2000
1500
1&
0,
FA
M
2
1000
kg/h
for
M Connection
balance pipe
The performance graph indicates the continuous discharge capacities of
condensate per hour at various pressure differentials across the trap.
Capacity lb/h
A
B
C
D
E
F
G
H
I
J
k
L
COnDenSaTe CaPaCiTy
MATERIALS
pART
MFA-0,1,2
MFA-S
Body
Cast iron Gr.250
Cast steel WCB
Cover
Same as body material
Plate
Stainless steel 1/8” thick
Holder
Stainless steel
Float
Stainless steel
Cover gasket
Stainless steel with non-asbestos filler
Cover screw
High tensile steel Gr. S
Strainer
Stainless steel
Stem and ball
Stainless steel
Seat (1)
SS hardfaced with Stellite 6
Self- locking adjusting nut Stainless steel
Pivot plug
Stainless steel
S
FA
M
500
1000
400
ENGINEERING DATA
TyPe
psi / bar
0-125
0-8.5
125
8.5
psi / bar
MFa0
MFa1
300
PreSSUre
range
MaX
TeMP
PMO
MFa2
0-200
0-14
200
14
MFaS
0-150
0-10.5
0-230
0-16
150
10.5
230
16
0-300
0-21
300
21
MaX
CaPaCiTy
OriFiCe
in/mm
˚F/˚C
500
200
lb/hr/kg/hr
4,500
2.045
4,500
2,045
Cast iron
Gr.250
6,000
2,727
7/32
5.5
3,000
1,364
3,500
1,590
Cast
carbon
steel
WCB
100
200
4,000
1,818
TyPe
MFa0
iN/mm
1/2 3/4
15 20
A
B (1)
C (2)
D
WeighT
CenTer TO FaCe CenTer TO FaCe lengTh LB/kg
4 3/8
1 1/8
6 3/4
8.75
111
29
171
4
C
Type MFA1, 2
C
D
D
Type MFAS
MFa1
1/2 3/4 1
15 20 25
a (1)
FaCe TO FaCe
6 5/8
168
MFa2
3/4
1
20 25
7 11/16
195
4 3/4
121
1 7/16
37
9 3/8
238
15
7
MFa2
1 1/4 1 1/2
32 40
8
203
4 1/2
114
1 3/4
44
10 3/8
264
17
8
Size
iN/mm
600
A B
B
(1) Center of inlet to outlet face. (2) Center of outlet to inlet face.
TyPe
100
Differential Pressure psi
Type MFA0
DIMENSIONS & wEIGHTS
a
heighT
6 1/8
156
50
10
Maximum cold water capacity x 3.5
PMA = Maximum allowable pressure = PMO
Maximum cold hydrostatic test pressure: 400psi.g (27.5bar.g) where PMO ≤ 200psi
Twice PMO
where PMO > 200psi
PMO = Maximum operating pressure:
(See Table)
Size
5
1
B (2)
C (3)
CenTer TO CenTer CenTer TO FaCe
3 15/16
1 3/8
100
35
D
lengTh
8 5/16
211
WeighT
LB/kg
12
5.5
C
(1) Vertical connection. (2) Horizontal connection. (3) Center of vertical outlet to face of horizontal outlet.
TyPe
MFaS
Size
iN/mm
1/2 3/4
1
15 20 25
a
FaCe TO FaCe
SCR/SW
BW
Flg
3 11/16
94
9 11/16
246
6
152
B
C
CenTer TO BOTTOM CenTer TO TOP
5 1/4
133
9 1/4
235
WeighT
LB/kg
SCR/SW BW
18
8
20
9
B
Flg
30
14
A
A
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 43
43
9/1/09 4:35:26 PM
INCLINEd stRAINERs
DESIGN FEATURES
A
●● Forged body (A)
offers the advantages of high strength,
structural integrity and reliability that make
it an ideal choice for steam service.
●● Stainless steel screen (B)
can withstand severe abrasive service and is carefully
fitted to prevent leakage between
the screen and body.
Screens are normally supplied in stainless steel with
0.031” (0.8 mm) holes (26% free area) and are also
available in F22.
●● Easy internal maintenance
Strainers are extremely easy to clean.
They may be blown down by simply removing the
optional blow down plug or via a suitable valve fitted in
its place.
B
AppLICATIONS
Velan strainers protect steam traps, pumps, temperature
and pressure regulators, gauges, instruments, air motors
and other equipment from dirt, scale and other debris.
C
B
A
B
DIMENSIONS & wEIGHTS
Size
a
FaCe TO FaCe
SCR/SW
BW (1)
in
Screwed
ends
Screwed
ends
Buttweld
ends
44
mm
Socketweld
ends
1/2
Socketweld
ends
Buttweld
ends
with stub
15
3/4
20
1
25
11/4
32
11/2
32
2
50
1500
B
BUTT WelD (STUBS)
& FlangeD
C
CenTer TO
BOTTOM
2500
1500
2500
1500
2500
1500
2500
3 5/8 4 1/4
92
108
41/4 41/4
108
108
5 11/16 5 5/16
144
135
7
178
7
178
8
203
35/8
92
41/4
108
5 11/16
144
61/4
159
63/4
171
8
203
41/4
108
41/4
108
5 5/16
135
7
178
7
178
8
203
8 1/2
216
9
229
10
254
11
297
12
305
141/2
368
10 3/8
264
10 3/4
273
12 1/8
308
13 3/4
349
15 1/8
384
17 3/4
451
5
127
5 3/8
136
5
127
5 3/4
146
7
178
81/2
216
81/2
216
121/2
318
(1) These buttweld dimensions do not comply with ASME/ANSI B16.10
(BS 2080). Velan reserves the right to vary specifications from time to time.
Buttweld
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
Buttweld
ends
ends
with stub
CAT-ST-09-09.indd 44
Gasketted
end
construction
Alternate
seal weld
C
A
OPTIONAL BLOWDOWN
PLUG
9/1/09 4:35:27 PM
ACCEssORIEs
vACUUM
BREAkERS
STRAINER
BLOwDOwN
vALvE
5
Vacuum breakers should
be installed wherever
vacuum is created
in pipelines or other
equipment to ensure
trouble free operation
such as in heating coils for
uninterrupted production
and elimination of freezing.
4
3
1
The units are factory set to
operate at 5 inHg (mercury)
(0.17 bar) vacuum but can
easily be reset to suit plant
conditions.
2
Other applications include:
unit heaters, cooking
kettles, blast coils and airconditioning equipment.
Seating facehardface with
Stellite 6 and lapped with ball.
Size
nPT
ThreaD
OriFiCe
in/mm
in/mm
in/mm
B
WeighT
1/2
15
3/4
20
1/2
13
5/8
16
3/4
19
2 3/8
60
2 3/4
70
2 3/4
70
4
112
8
224
1
25
1 1/2
38
1 11/16
43
2 3/16
56
a
oz/g
in/mm
A
11
308
STANDARD MATERIALS
pART
A Body
B
Stem and ball
C
D
E
Compression spring
Adjusting nut
Self locking nut
Blowdown
valve
Connections:
Inlet: 3/8” (10 mm)
male screwed BSP or NPT
Outlet: 1/8” (3 mm) female screwed BSP or NPT
ENGINEERING DATA
B
A rugged stainless
steel blowdown
valve can be
installed below the
strainer in Velan
steam traps as
an optional extra.
Body and valve are
both stainless steel
hardened. A forged
steel globe, stop or
needle valve can
be fitted for high
pressure operation
or where greater
integrity is required.
MATERIALS SpECIFICATION
Stainless steel BS 970-410S21
BS 970-410S21
Stainless steel Stem:
Ball: AISI 440C
Stainless steel BS 970-303S21
Stainless steel BS 970-410S21
Stainless steel BS 970-304S15
TEMpERATURE CONTROLLER
Available for SSF, SpF, SF & Sp
Velan steam traps are factory set to discharge condensate
below saturated steam temperature, to save energy up
to 30% and no further adjustment is required provided
the trap is properly selected based on capacity. To change
the discharge temperature you must turn the regulating
nut of the temperature controller towards the bottom of
the trap to increase the differential temperature or away
from the bottom of the trap to decrease the differential
temperature. The movement of the regulating nut is
transferred directly without friction to the trap valve and
the free movement of the valve is increased or decreased
accordingly. The result of the setting can be determined
by checking the condensate’s temperature with a Velan
thermometer installed on the trap. Other uses for the
temperature controller are:
a) Excessive back pressure can be
compensated for by turning the
controller away from the trap
bottom.
THERMOMETER
The Velanthermometer is
actuated by a bimetallic
helix shaped strip, which
is enclosed in stainless
steel. Its strong design
will withstand adverse
conditions and combines
reliability with accuracy.
The thermometer can be
recalibrated on the spot and can
be supplied with the following
scales and ranges of operation:
b) If condensate is backed up,
a faster rate of discharge
is obtained by turning the
controller away from the trap
bottom, increasing the valve
clearance.
c) If the trap leaks steam, and the
seating faces are not dirty or
damaged, turning the controller
towards the trap bottom will
reduce the valve clearance thus
slowing the trap response time,
preventing steam loss.
32°F – 572°F (0°C – 300°C)
Case diameter: 13/4” (45 mm)
Length: 11/2” (38 mm)
Screwed connection: 1/4” NPT
32°F – 932°F (0°C – 500°C)
Case diameter: 2 3/4” (70 mm) Length: 3 3/4” (95 mm)
Screwed connection: 1/4” NPT
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 45
45
9/1/09 4:35:28 PM
VELAN stEAM tRAPs
save up to
30% energy
*thermal units are in Btu/lb (kcal/kg)
Typical Example:
Oil storage tank heating coil
Required heat input:
2,000,000 Btu/h (504,000 kcal/h)
Steam supply:
250 psi/406°F (17.2 bar/208°C)
ENERGY (STEAM) INpUT
using conventional bucket, float,
thermodynamic and bellows traps
Condensate is discharged as soon
as it forms. The latent heat is
extracted which, in our example,
is 820 (456)* per pound of condensate. Most of the sensible heat
contained in the condensate 381.5
(212)* or 32% is wasted.
STEAM DEMAND
2,000,000 Btu/h = 2,440 lb/h
= ––––––––––––––––
820 Btu/lb
of Steam
or
504,000 kcal/h = 1,105 kg/h
= ––––––––––––––––
456 kcal/kg
of Steam
250 psi
(17.2 bar)
Input per lb (kg)*
1201 (668)* 100%
381 (212)*
820 (456)*
820 (456)* 67% used
180°F
406°F
(208°C)
82°C
ENERGY (STEAM) INpUT
using velan bimetallic traps
When using Velan bimetallic steam traps the
discharge temperature of condensate is adjusted by
a temperature controller and most of the sensible
heat in the conden-sate is saved. Condensate is
discharged at 180°F (82°C). 231.5 (129)* [381.5150 (212-83)*] are available to re-evaporate part
of lodged condensate 820 (456)* required per lb
(kg). 231.5 (129)* will evaporate
Input per lb (kg)*
1201 (668)* 100%
29% into live steam. Heat is
transferred to the oil efficiently
381 (212)*
and the heating process with high
pressure condensate approaches
820 (456)*
heating with live steam.
Temperature
Controller
SaVingS
46
STEAM DEMAND
2,000,000 Btu/h =
= ––––––––––––––––––
(820 + 231.5) Btu/lb
or
504,000 kcal/h =
= ––––––––––––––––––
(456 + 129) kcal/kg
1,900 lb/h
of Steam
381 (212)*
1051 (584)* 89% used
861 kg/h
of Steam
STeaM SaVingS
540 lb/h (244kg/h) [2,440-1,900 or 22% (1,105-861 or 22%)] 4,730,400 lb/year
9,460 uS $ /year (at 2 uS $ for 1000 lb (455 kg) of Steam
submit your steam trapping systems to Velan for free energy savings analysis
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 46
9/1/09 4:35:29 PM
comparison of principles of operation
What design features to look for when selecting a steam trap
FACTS FOR
ESTIMATING
TRAP VALUE
Velan Universal
Thermostatic
Float
Bucket
Thermodynamic
Discharge valve Heat of steam closes Only by heat.
Buoyancy and Closed by steam Closed by flow of hot conactuated by:
valve. Pressure weight of float.
pressure. Opened by densate flashing into vapor.
opens valve when bucket weight and Opened by flow of cold
condensate cools down.
high levelage.
condensate, no flashing.
Perfect discharge
Condensate Selected trap size exactly Selected trap size exactly Selected trap size exactly Condensate when:
cools down
conforms with working
conforms with working
conforms with working
temperature low.
pressure and capacity.
pressure and capacity.
pressure and capacity.
Trap selection:
Universal sizes According to capacity Certain after trial only Certain after trial only According to capacity
with large range and temperature.
due to small adaptability
due to small adaptability
and temperature.
to pressure and to pressure and capacity variations.
capacity variations.
Incorrect selection
Universal sizes
Low discharge Steam loss. Steam loss
Low discharge
effects:
capacity.
No flow or No flow or
capacity.
continuous flow.
continuous flow.
Adjusting facilities for The only trap adjustable None. None. New size or type None. New size or type None.
changed conditions:
for specific conditions. New size required
required. New valve required. New valve New size or
No change of parts required
orifice eventually.
orifice eventually.
type required.
Ability for air Automatically with Automatic air None. Additional cost Small. Extra cost Automatically.
elimination:
full trap capacity.
elimination. for air-bypass valve for auxiliary No additional
No additional valve
No additional of valve
and its installation
air-bypass valve
check valve
Ability to handle cold Automatic cold water
Automatic cold Intermittent discharge Automatic cold Automatic cold
initial peakloads:
discharge with full capacity condensate discharge
causes shocks
condensate discharge
condensate discharge
Ability to handle ordinary Integral strainer in all
None. Extra cost for None. Extra cost for
None. Extra cost for None.
sediment and sludge,
units. Low first cost and strainer, additional fittings strainer additional fittings strainer. Clogging of bucket Extra cost for strainer
dirt conditions:
cheapest installation
and installation
and installation
hole results in steam waste. and its installation
Absence of strainer Integral strainer Smaller flow. Smaller flow. No flow. No flow. Continuous flow.
often causes: in all units
Steam loss.
Steam loss.
Buckets vent plugged Steam waste.
Dirt getting into work- Dirt getting into work-
or trap filled with dirt. Dirt, scale clogging
ing parts and orifice.
ing parts and orifice.
Steam waste.
seats and valve orifice.
Ability to handle
Good as bimetal
Good as bellow Small. Pressure high: Small. Pressure high: Good.
pressure variations:
follows saturated function of no flow. New valve orifice no flow. New valve orifice Depending on conden-
steam curve
saturated steam
for raised pressure
for raised pressure
sate temperature
Ability to handle Good due to Depending on Small. Small.
Depending on
variations in load:
oversized orifice
size of trap
Continuous discharge Continuous discharge
size of trap
of trap too small.
of trap too small.
Ability to close valve Yes. If required for 100% Small
None
None
Small
on hot water only to steam loss proof operation. prevent steam loss:
Adjustability by temper
ature controller (optional)
Ability to handle Patented discharge valve None. Extra cost for None. Extra cost for None. Extra cost for None. Extra cost for
back pressure:
operates as check valve. check valve, additional
check valve. Steam loss check valve. Steam loss check valve. Steam loss if
No extra cost for separate
fittings and their if sudden or frequent if sudden or frequent sudden or frequent
check valve involved
installation
frequent drop in pressure. frequent drop in pressure. drop in pressure.
Installation The only all-position Only one position. Only horizontal. Not Only vertical. Costly Only horizontal.
position:
straight way type
Additional cost for fitting. suitable for marine service piping. Not suitable for Costly piping
(float). Costly piping
marine service (float)
Installation
Lowest. Installed directly High additional High. High. Fair. Extra cost for
cost:
in pipe line without cost for strainer, Extra cost for additional Extra cost for additional
fittings. Integral strainer,
check valve.
fittings, strainer,
fittings, strainer,
check valve, air-bypass.
check valve, air vent.
check valve, air vent.
Maintenance
Lowest.
High. High.
Fair. Fair.
cost:
One size interchangeable. Many sizes, large Many sizes, large
Many sizes. Many sizes.
all over the plant. No fittings. stock of spare parts, stock of spare parts,
Large stock of Large stock of
Considerably reduced spare fittings. Short life of fittings. Short life of
spare parts, fittings.
spare parts, fittings.
parts stock. Element cheap. flexible element.
valve due to shocks.
Delicate valve
Size, weight:
Small, light weight
Fair
Large, heavy. Medium. For high capacity Fair
Weight up to 80 lb (36 kg) weight up to 80 lb (36 kg)
Freezeproof 100% freezeproof in vertical Special types. Not when None
None
Yes
operation:
position. Valve widely open. trap fails and closes valve.
Ability to control Automatic temperature None
Precautions Precautions
None
temperature in control for specific
necessary.
necessary.
heat process:
requirements; optional
Superheated Highly recommended Good only up to Fair. Danger of Fair. Danger of Fair but always small
steam:
up to 1100°F (593°C). 500°F (260°C). re-evaporation body-
re-evaporation of body-
steam escapes.
Valve tightly closed or Expensive stainless water and tremendous water and tremendous
high temperature.
steel bellows.
loss of steam.
loss of steam.
Note: The information on this page is general in nature and not intended to show the exact design or performance of any specific manufacturer.
The technical comparisons are not intended to downgrade other trap types but to compare their features and operating principles with the Velan Steam Trap.
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 47
47
9/1/09 4:35:30 PM
Selection – sizing
determining the capacity of steam traps
To determine the discharge capacity of steam traps, the
following factors must be taken into consideration:
below saturated steam temperature, but this can be varied
if required.
●● Pressure differential between inlet and outlet
If the condensate is cooler, when starting up from cold
for instance, the capacities will be increased considerably.
A small increase in the setting of the trap will result in a
closer temperature differential and an increase in capacity.
●● Diameter of orifice
●● Discharge temperature of condensate
The condensate capacity charts given for each type are
based on tests under working conditions and represent
the actual maximum performance with condensate at 40°F
(22°C) below saturated steam temperature, which is the
standard setting.
A decrease in setting will provide an element of
temperature control, discharging cooler condensate at
predetermined temperatures, with reduced flow rates.
Traps will normally commence opening at 15°F (8°C)
how to select the size and type of trap for a given duty
Calculate or estimate the maximum amount of steam condensate in lb/h or kg/h and multiply by the
appropriate safety factor shown in the Table of Safety Factors (see bottom page 33).
Ascertain the minimum pressure at the trapping point and the maximum pressure liable to occur at the
outlet side of the trap. The difference of these two gives the Pressure Differential.
There are four possible arrangements for the trap, with corresponding variations in the Pressure Differential
(Example: with steam at 20 psi (1.38 bar)):
(a) Trap discharging to atmosphere:
Pressure on outlet of trap
The Pressure Differential
=
0
20 psi
(B)
5 psi
20 - 5 psi
15 psi
Trap discharging into a closed return main
with a positive backpressure of
Pressure at trap outlet
The Pressure Differential
=
Imperial
(c) Trap discharging into overhead return main, open to atmosphere, 6ft (1.8m)
above the trap. The condensate therefore has to be lifted and causes a back pressure
of approximately 1 psi for every 2 ft of lift (0.11 bar per meter).
20 - 6/2
20 - 3
The Pressure Differential
=
17 psi
Metric
0
1.38 bar
0.34 bar
1.38 - 0.34 bar
1.04 bar
1.39 - 0.11 x1.8
1.38 - 0.198
1.18 bar
(D) Trap discharge into a vacuum, such as a condenser.
In this case, as the trap pressure is above atmospheric pressure the condenser pressure must be added
to obtain the Pressure Differential. Condenser pressures normally are given by vacuum
gauges in inches of mercury (inHg) and/or bar. When calculating in imperial units the inHg should
be converted to psi as follows: 2 inHg corresponds to approximately 1 psi.
If the vacuum gauge reads 16 inHg (-0.54 bar):
20 + 16/2
1.38 + 0.54
20 + 8
+1.92 bar
The Pressure Differential
=
28 psi
Having calculated the Pressure Differential refer to the individual Performance Charts
and select a trap suitable for the estimated discharge at the Pressure Differential.
48
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 48
9/1/09 4:35:30 PM
Steam Tables
GAUGE
Pressure
-0.96
-0.91
-0.86
-0.81
-0.76
-0.71
-0.66
-0.61
-0.56
-0.51
-0.46
-0.41
-0.36
-0.31
-0.26
-0.21
-0.16
-0.11
-0.06
-0.01
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
3.8
4.0
4.2
4.4
4.6
4.8
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
28.4
27.0
25.5
24
22.5
21.1
19.6
18.1
16.6
15.1
13.7
12.2
10.7
9.24
7.77
6.29
4.81
3.34
1.86
0.38
0
1.45
2.90
4.35
5.8
7.25
8.70
10.2
11.6
13.1
14.5
16.0
17.4
18.9
20.3
21.8
23.2
24.7
26.1
27.6
29.0
31.9
34.8
37.7
40.6
43.5
46.4
49.3
52.2
55.1
58.0
60.9
63.8
66.7
69.6
72.5
79.8
87.0
94.3
102
109
116
123
131
138
145
152
160
167
174
181
189
196
203
210
218
These fgures are in inches of Mercury
psi.g
VACUUM
VACUUM
bar.g
ABSOLUTE
Pressure
SATURATION
Temperature
(ts)
bar.a
psi.a
°C
°F
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1.0
1.013
1.11
1.21
1.31
1.41
1.51
1.61
1.71
1.81
1.91
2.01
2.11
2.21
2.31
2.41
2.51
2.61
2.71
2.81
2.91
3.01
3.21
3.41
3.61
3.81
4.01
4.21
4.41
4.61
4.81
5.01
5.21
5.41
5.61
5.81
6.01
6.51
7.01
7.51
8.01
8.51
9.01
9.51
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
0.725
1.45
2.18
2.90
3.63
4.35
5.08
5.80
6.53
7.25
7.98
8.7
9.43
10.2
10.9
11.6
12.3
13.1
13.8
14.5
14.696
16.1
17.5
19.0
20.5
21.9
23.4
24.8
26.3
27.7
29.2
30.6
32.1
33.5
35.0
36.4
37.9
39.3
40.8
42.2
43.7
46.6
49.5
52.4
55.3
58.2
61.1
64.0
66.9
69.8
72.7
75.6
78.5
81.4
84.3
87.2
94.4
102
109
116
123
131
138
145
152
160
167
174
181
189
196
203
210
218
225
232
32.9
45.8
54.0
60.1
65.0
69.1
72.7
75.9
78.7
81.3
83.7
85.9
88.0
90.0
91.8
93.5
95.1
96.7
98.2
99.6
100
103
105
107
110
112
114
115
117
119
120
122
123
125
126
128
129
130
131
133
134
136
138
140
142
144
146
147
149
150
152
153
155
156
158
159
162
165
168
171
173
175
178
180
182
184
186
188
190
192
193
195
197
198
200
202
91
114
129
140
149
156
163
169
174
178
183
187
190
194
197
200
203
206
209
211
212
217
221
225
230
234
237
239
243
246
248
252
253
257
259
262
264
266
268
271
273
277
280
284
288
289
293
297
298
302
304
307
309
313
315
316
324
329
333
338
343
347
351
354
360
363
367
370
374
376
379
383
385
388
392
394
SPECIFIC
Volume Steam
SPECIFIC ENTHALPY
WATER
sensible
heat (hf)
kJ/kg
EVAPORATION
Latent
heat (hfg)
kJ/kg
WATER
sensible
heat (hf)
Btu/lb
138
192
226
251
272
289
304
318
330
341
351
360
369
377
384
392
399
405
411
418
419
430
441
450
460
468
476
484
492
499
506
512
519
525
531
536
542
547
552
557
562
572
581
589
597
605
613
620
627
634
641
647
653
659
665
671
685
698
710
721
733
743
753
763
773
782
790
798
807
815
823
830
838
845
852
859
2423
2392
2373
2358
2346
2336
2327
2319
2312
2305
2299
2294
2288
2283
2279
2274
2270
2266
2262
2258
2257
2250
2243
2237
2231
2226
2220
2215
2211
2206
2201
2197
2193
2189
2185
2181
2177
2174
2170
2167
2163
2157
2151
2145
2139
2133
2128
2123
2118
2113
2108
2104
2099
2095
2090
2086
2076
2066
2057
2048
2039
2031
2023
2015
2008
2000
1993
1986
1979
1973
1966
1960
1953
1947
1941
1935
59
82
97
108
117
124
131
137
142
147
151
155
159
162
165
169
172
174
177
179
180
185
190
194
198
201
A205
208
212
215
218
220
223
226
228
230
233
235
237
240
242
246
250
253
257
260
264
267
270
273
276
278
281
283
286
289
295
300
305
310
315
319
324
328
332
336
340
344
347
350
354
357
360
363
366
369
Vg
EVAPORATION
Latent
heat (hfg)
Btu/lb
1042
1029
1020
1014
1009
1004
1000
997
994
991
988
986
984
982
980
978
976
974
972
971
970
967
964
962
959
957
954
952
951
948
946
945
943
941
939
938
936
935
933
932
930
927
925
922
920
917
915
913
911
908
906
905
902
901
899
897
893
888
884
880
877
873
870
866
863
860
857
854
851
848
845
843
840
837
834
832
m3/kg
ft3/lb
28.2
14.7
10.0
7.65
6.20
5.23
4.53
3.99
3.58
3.24
2.96
2.73
2.54
2.37
2.22
2.09
1.97
1.87
1.78
1.69
1.67
1.53
1.41
1.31
1.23
1.15
1.08
1.02
0.971
0.923
0.881
0.841
0.806
0.773
0.743
0.714
0.689
0.665
0.643
0.622
0.603
0.568
0.536
0.509
0.483
0.461
0.44
0.422
0.405
0.389
0.374
0.361
0.348
0.336
0.325
0.315
0.292
0.272
0.255
0.24
0.227
0.215
0.204
0.194
0.185
0.177
0.171
0.163
0.157
0.151
0.146
0.141
0.136
0.132
0.128
0.124
452
236
160
123
99.3
83.8
72.6
63.9
57.3
51.9
47.4
43.7
40.7
38.0
35.6
33.5
31.6
30.1
28.5
27.1
26.8
24.5
22.6
21.0
19.7
18.4
17.3
16.3
15.6
14.8
14.1
13.5
12.9
12.4
11.9
11.4
11.0
10.7
10.3
9.96
9.66
9.1
8.59
8.15
7.74
7.38
7.05
6.76
6.49
6.23
5.99
5.78
5.57
5.38
5.21
5.01
4.68
4.36
4.09
3.84
3.64
3.44
3.27
3.11
2.96
2.84
2.74
2.61
2.51
2.42
2.34
2.26
2.18
2.11
2.05
1.99
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 49
49
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Steam Tables
GAUGE
Pressure
50
ABSOLUTE
Pressure
SATURATION
Temperature
(ts)
bar.g
psi.g
bar.a
psi.a
°C
15.5
16.0
16.5
17.0
17.5
18.0
18.5
19.0
19.5
20.0
21.0
22.0
23.0
24.0
25.0
26.0
27.0
28.0
29.0
30.0
31.0
32.0
33.0
34.0
35.0
36.0
37.0
38.0
39.0
40.0
41.0
42.0
43.0
44.0
45.0
46.0
47.0
48.0
49.0
50.0
52.0
54.0
56.0
58.0
60.0
62.0
64.0
66.0
68.0
70.0
72.0
74.0
76.0
78.0
80.0
82.0
84.0
86.0
88.0
90.0
92.0
94.0
96.0
98.0
100.0
110.0
120.0
130.0
140.0
150.0
160.0
170.0
180.0
190.0
200.0
225
232
239
247
254
261
268
276
283
290
305
319
334
348
363
377
392
406
421
435
450
464
479
493
508
522
537
551
566
580
595
609
624
638
653
667
682
696
711
725
754
783
812
841
870
899
928
957
986
1015
1044
1073
1102
1131
1160
1189
1218
1247
1276
1305
1334
1363
1392
1421
1450
1595
1741
1886
2031
2176
2321
2466
2611
2756
2901
16.5
17.0
17.5
18.0
18.5
19.0
19.5
20.0
20.5
21.0
22.0
23.0
24.0
25.0
26.0
27.0
28.0
29.0
30.0
31.0
32.0
33.0
34.0
35.0
36.0
37.0
38.0
39.0
40.0
41.0
42.0
43.0
44.0
45.0
46.0
47.0
48.0
49.0
50.0
51.0
53.0
55.0
57.0
59.0
61.0
63.0
65.0
67.0
69.0
71.0
73.0
75.0
77.0
79.0
81.0
83.0
85.0
87.0
89.0
91.0
93.0
95.0
97.0
99.0
101
111
121
131
141
151
161
171
181
191
201
239
247
254
261
268
276
283
290
297
305
319
334
348
363
377
392
406
421
435
450
464
479
493
508
522
537
551
566
580
595
609
624
638
653
667
682
696
711
725
740
769
798
827
856
885
914
943
972
1001
1030
1059
1088
1117
1146
1175
1204
1233
1262
1291
1320
1349
1378
1407
1436
1465
1610
1755
1900
2045
2190
2335
2480
2625
2770
2915
203
204
205
207
209
210
211
213
214
215
217
220
222
224
226
228
230
232
234
236
238
239
241
243
244
246
247
249
250
252
253
255
256
258
259
260
261
263
264
265
268
270
272
272
277
279
281
283
285
287
289
291
292
294
296
298
299
301
302
304
305
307
309
310
312
319
325
331
337
343
348
353
357
362
366
°F
397
399
401
405
408
410
412
415
417
419
423
428
432
435
439
442
446
450
453
457
460
462
466
469
471
475
477
480
482
486
487
491
493
496
498
500
502
505
507
509
514
518
522
525
531
534
538
541
545
549
552
556
559
561
565
568
570
574
576
579
581
585
588
590
594
606
617
628
639
694
658
667
675
684
691
SPECIFIC
Volume Steam
SPECIFIC ENTHALPY
WATER
sensible
heat (hf)
kJ/kg
EVAPORATION
866
872
879
885
891
897
903
909
915
920
931
942
952
962
972
982
991
1000
1009
1017
1026
1034
1042
1050
1058
1066
1073
1080
1087
1095
1102
1108
1115
1122
1129
1135
1142
1148
1155
1161
1173
1185
1197
1208
1219
1230
1241
1251
1262
1272
1283
1293
1303
1312
1322
1331
1341
1350
1359
1368
1377
1386
1395
1404
1412
1454
1495
1535
1575
1614
1654
1694
1736
1782
1833
1929
1923
1918
1912
1907
1901
1896
1890
1885
1880
1870
1860
1850
1841
1831
1822
1813
1804
1796
1787
1779
1770
1762
1754
1746
1737
1730
1722
1714
1706
1699
1691
1684
1676
1669
1662
1654
1647
1640
1633
1619
1605
1591
1577
1564
1551
1538
1525
1512
1499
1486
1473
1460
1447
1435
1422
1410
1398
1385
1368
1360
1348
1336
1323
1311
1249
1188
1125
1060
994
925
850
769
679
562
Latent
heat (hfg)
kJ/kg
WATER
sensible
heat (hf)
Btu/lb
372
375
378
381
383
386
388
391
393
396
400
405
409
414
418
422
426
430
434
437
441
445
448
451
455
458
461
464
467
471
474
476
479
482
485
488
491
494
497
499
504
509
515
519
524
529
534
538
543
547
552
556
560
564
568
572
576
580
584
588
592
596
600
604
607
625
643
660
677
649
711
728
746
766
788
Vg
EVAPORATION
Latent
heat (hfg)
Btu/lb
m3/kg
ft3/lb
829
827
824
822
820
817
815
813
810
808
804
800
795
792
787
783
779
776
772
768
765
761
758
754
751
747
744
740
737
733
730
727
724
721
718
715
711
708
705
702
696
690
684
678
672
667
661
656
650
644
639
633
628
622
617
611
606
601
595
590
585
580
574
569
564
537
511
484
456
427
398
365
331
292
242
0.120
0.117
0.114
0.110
0.108
0.105
0.103
0.100
0.0972
0.0949
0.0906
0.0868
0.0832
0.0797
0.0768
0.0740
0.0714
0.0689
0.0666
0.0645
0.0625
0.0605
0.0587
0.0571
0.0554
0.0539
0.0524
0.0510
0.0498
0.0485
0.0473
0.0461
0.0451
0.0441
0.0431
0.0421
0.0412
0.0403
0.0395
0.0386
0.0371
0.0356
0.0343
0.0330
0.0319
0.0308
0.0297
0.0288
0.0278
0.0270
0.0261
0.0253
0.0246
0.0239
0.0232
0.0226
0.0219
0.0213
0.0208
0.0202
0.0197
0.0192
0.0187
0.0183
0.0178
0.0158
0.0141
0.0126
0.0114
0.0102
0.00922
0.00829
0.00743
0.00660
0.00577
1.92
1.87
1.83
1.76
1.73
1.68
1.65
1.6
1.56
1.52
1.45
1.39
1.33
1.28
1.23
1.19
1.14
1.1
1.07
1.03
1
0.97
0.94
0.915
0.887
0.863
0.839
0.817
0.798
0.777
0.758
0.738
0.722
0.706
0.690
0.674
0.660
0.646
0.633
0.618
0.594
0.570
0.549
0.529
0.511
0.493
0.476
0.461
0.445
0.432
0.418
0.405
0.394
0.383
0.372
0.362
0.351
0.341
0.333
0.324
0.316
0.308
0.300
0.293
0.285
0.253
0.226
0.202
0.183
0.163
0.148
0.133
0.119
0.106
0.0924
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 50
9/1/09 4:35:30 PM
how to
HOW
TO order
ORDER
Model
A
SP
F
End
connection
type
End
connection
size
B
C
7
AW O
Working
pressure
psig (max)
Type
Body
material
Accessories
Trim
options
D
E
F
G
H
J
A
2
1
R
Above example: SPFA (0, 1, 2 & 3), 11/2”socket weld connection, maximum 350 psig, in carbon steel, with
temperature controller and Truflex trim.
The figure numbers shown on this key are designed to cover essential features of Velan steam traps. Please use figure numbers
to ensure prompt and accurate processing of your order. A detailed description must accompany any special orders.
A
B
C
MODEL
HPTD - HPTD
MFA5 - MFA5
TS01 - TS
MFTO - MFTO
MFTS - MFTS
TSFO - TSF
MFT1 - MFT1
MFAS - MFAS
USTO - UST
MFT2 - MFT2
NOOO - N
VBOO - vacuum breaker
MFT3 - MFT3
QCOO - Q
VTDO - VTD
MFT4 - MFT4
SFOO - SF
VTDS - VTDS
MFT5 - MFT5
SSFO - SSF
VTSO - VTS
MFAO - MFAO
SPFA - SPF 0, 1, 2 & 3
MFA1 - MFA1
SPFB - SPF 4, 5, 6 & 7
MFA2 - MFA2
SPOO - SP 6, 7 & 8
End Connection Type
BUTTWELD:
FLANGED:
FLANGED:
AO - SCH. 40
(Raised face)
FJ - BST “A”
BO - SCH. 80
FA - ASME 150
FK - BST “D”
CO - SCH. 160
FB - ASME 300
FL - BST “E”
DO - Combination ends FC - ASME 600
FM - BST “F”
WO - Socket weld
FD - ASME 1500
FN - BST “H”
XO - Special ends
FE - ASME 2500
FO - BST “J”
SCREWED:
FF - PN 10/16
FP - BST “K”
NO - NPT
FG - PN 25/40
FQ - BST “R”
SO - BSP.P
FH - PN 64
FR - BST “S”
TO - BSP.T
FI - PN 100
FS - BST “T”
FT-PN 160
FX - Special
END CONNECTION SIZE
0 - Special
3 - 1⁄2” (15 mm) 6 - 1 1⁄4” (32 mm) 9 - 2 1⁄2” (65 mm)
1 - 1⁄4” (8 mm)
4 - 3⁄4” (20 mm) 7 - 1 1⁄2” (40 mm) 10 - 3” (80 mm)
2 - 3⁄8” (10 mm) 5 - 1” (25 mm)
8 - 2” (50 mm)
D WORKING PRESSURE psig (maximum)
W - 1000
A - 15
F - 150
L - 600
R - 250
B - 25
G - 200
M- 1500
S - 900
X - Special
C - 50
H - 300
N - 2500
T - 675
Y - 30
D - 100
J - 350
P - 40
U - 230
Z - 2600
E - 125
K - 400
Q - 120
V - 485
AC - 4000
E TYPE
A - Steam traps
G- Freeze protector
B - Trap with integral bypass
H - Piping King (isolating valve)
C - Piping King (no bypass)
I - Trap + 2 PBV double isolation
D - Piping King (with bypass)
J - Trap + 3 PBV bypass unit
E - Air trap
K - Trap + 1 PBV single isolation
F - Vacuum breaker
X - Special
F Body material
1 - Special
6 - Chr. moly., alloy steel, F22/WC9
2 - Carbon steel, A105/WCB
7 - Cast iron
4 - Chr. moly., alloy steel, F91/C12A 8 - Bronze
5 - Chr. moly., alloy steel, F11/WC6 9 - Stainless steel
G ACCESSORIES
0 - None
1 - Temperature controller
2 - Strainer blowdown valve
3 - Test valve
4 - Strainer plug
5 - Combination
6 - Special
7 - Sight glass
8 - Thermometer
9 - Separate strainer
H TRIM OPTIONS
A - Special element
B - Welded seat
C - Screwed seat
D - Combination
R - Truflex
O - None
Notes:
1 .For a more detailed list of available trims, contact the factory or visit our web site at www.velan.com
2. ANSI Class Trap – Suffix Fig No. with hyphen class rating eg N000W05MA20R – 1500 = 1” Socketweld N trap 1500psi operating pressure with shell rating to
ANSI Class 1500.
3. Pipe Connectors for Universal Steam Trap Type UST available in sizes 1/2”,3/4” & 1” on request.
table of safety factors
TYPE OF EQUIPMENT
SAFETY FACTOR
Coils (blast, unit heaters), air heaters, dryers,
air conditioning plant:
(a) Using inside air........................................................................................ 2
(b) Using outside air:.................................................................................... 3
Kilns, drying room ovens, steam mains,
paper machines, drying cylinders, autoclaves, platens, laundry
ironers, sterilisers......................................................................................... 3
Heat exchangers calorifiers, jacketted pans,
hot water heaters, temperature control
and where throttling steam controls are used..................................... 3-4
Example: A trap is required for a heat exchanger which is supplied with
steam at 100 psi (7 bar) and has a consumption of 1500 lb (680 kg) steam
per hour. The trap discharges to closed return main at a pressure of
10 psi (0.7 bar). The safety factor for this type application is 2.
ImperialMetric
Trap inlet pressure
100 psi
7 bar
Trap outlet pressure
10 psi
0.7 Bar
Differential pressure
90 psi
6.2 Bar
Steam consumption
Applying safety factor of 2
1,500 lb/h
3,000 lb/h
680 kg/h
1,365 kg/h
Therefore select trap from the individual Performance charts
capable of discharging 3,000 lb/h (1,365 kg/h) at a differential
pressure of 90 psi (6.3 bar).
Velan reserves the right to change this information without notice. © 2009 Velan Inc. All rights reserved.
CAT-ST-09-09.indd 51
51
9/1/09 4:35:31 PM
VEL-PS
VEL-CSV
VEL-BG
VEL-SFV
VEL-BS
VEL-CRYO
VEL-API-603
VEL-KGV
VEL-PQCV
VEL-NCP
VEL-BF
VEL-MS
VEL-PBV
VEL-CBV
VEL-VTP
VEL-BV
CAT-GPBV
CAT-SAS-CFLEX
CAT-SAS-CCON
VEL-ST
Headquartered in Montreal, Canada, Velan has several international
subsidiaries. For general inquiries:
Velan head office
7007 Côte de Liesse, Montreal, QC H4T 1G2 Canada
Check our website for more
specific contact information.
Tel: (514) 748-7743 Fax: (514) 748-8635
www.velan.com
CAT-ST-10-09
Printed in Canada
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proprietary to Velan. Any unauthorized reproduction or disclosure, in whole or in part, is strictly prohibited. Velan
reserves the right to change this information without notice. Velan Valves, Velan Inc., Memoryseal, Securaseal,
Torqseal, Proquip, Velflex, Adaxie, and RAMA are trademarks or registered trademarks of Velan Inc. and/or another Velan company. All other trademarks and registered trademarks are owned by their respective companies.