Series 240 · 250 · 280 · Pfeiffer · W&T
Pneumatic and Electric Control Valves
Information Sheet Part 1
DN 15 ... 500
½” ... 16”
DN 15A ... 250A
·
·
·
Information Sheets Materials/Flow Coeff.
PN
10 ... 400
Class 125 ... 2500
JIS
10K/20K
T 8000-2/-3 EN
Control Valves
T 8012 EN to T 8097 EN
Steam-converting Valves
T 8250 EN to T 8265 EN
·
·
·
–200 ... 500 °C
–325 ... 930 °F
–200 ... 500 °C
Edition May 2005
Information Sheet
T 8000-1 EN
Contents
SAMSON control valves
Series 240, 250, 280, W&T and valves for special
applications
3
Table 1a · Series 240 Control Valves and valves
for special applications
4
Table 1b · Series 250 Control Valves and
W&T Valves
5
Table 1c · Steam-converting Valves - Series 280 and
W&T
5
Series 240
Type 3241 Globe Valve
6
Type 3241 in forged steel version
6
Type 3241-Gas, Pneumatic Control and Quick-acting
Shut-off Valve for gases
6
Type 3241-Oil, Pneumatic Control and Quick-acting
Shut-off Valve for liquid fuels and liquified petroleum gas
in the liquid phase
6
Type 3241 Control Valve with safety function,
typetested
7
Type 3244 Three-way Valve
7
Valves for special applications
Type 3248 Cryogenic Valve
Type 3249 Control Valve for aseptic service
Type 3345 Diaphragm Valve
Type 3347 Control Valve for food processing
Type 3351 Pneumatic On-off Valve
Type 3510 Micro-flow Valve
Series 250 and W&T
Type 3251 Globe Valve
Type 3252 High-pressure Valve
Type 3253 Three-way Valve
Type 3254 Globe Valve
Type 3256 Angle Valve
Type 3259 Angle Valve
W&T Type RVG Control Valve
Lined globe vlaves
Pfeiffer Type BR 1a with PTFE lining
Pfeiffer Type BR 1b with PFA lining
Series 280 and W&T
Type 3281 and Type 3286 Steam-converting Valves
Type 3284 Steam-converting Valve
W&T Type DUV-C3 Steam-converting Valve
Control valve details
Valve bodies and styles
Globe valve
Three-way valve
Angle valve
Cryogenic valve
Valve for food processing
Diaphragm valve
On-off valve
Micro-flow valve
Steam-converting valve
2
7
7
8
8
8
8
9
9
9
9
10
10
10
10
10
11
11
11
12
12
12
13
13
13
14
14
14
Valve bonnets
Packing
Steam line connection
14
15
Seat and plug trims
Seat leakage rate
Table 2 · Plug sealing and seat leakage rate
Pressure balancing
Control valves with ceramic trims
Flow dividers
AC trims and silencer
16
16
16
16
16
17
Additional components
Bellows seal
Insulating section
Heating jacket
17
17
18
Face-to-face dimensions
Globe and angle valves acc. to DIN and ANSI
18
Types of pipe connections
18
Valve-specific parameters
KVS coefficient
Rangeability
Inherent characteristic
19
19
19
Actuators
Pneumatic actuators
Electric actuators
Electrohydraulic actuators
Hand-operated actuators
20
20
20
20
Accessories for control valves
Positioners
Limit switches
Position transmitter/potentiometer
Solenoid valves
Lock-up valve
Pneumatic remote adjuster
Supply pressure regulators
Supply pressure regulators with air filter
Pneumatic volume booster
21
21
21
21
21
21
21
21
21
Valve sizing
Calculating the KV coefficient
Selecting the valve
22
22
Noise prediction
xFz factor
Table 3 · Series 240 and 250
Gases and vapors
Liquids
23
23
24
24
Materials conforming to DIN and ANSI/ASME
Table 4 · Materials
25
Selection and ordering
Selection and sizing of the control valve
Ordering text
25
25
Specification sheet for control valves
26
T 8000-1 EN
SAMSON control valves
Welland & Tuxhorn valves
Series 240, 250 and 280 Control Valves include pneumatic
and electric globe valves, three-way valves, and angle valves.
Their application range covers control tasks in process engineering and industrial applications as well as in supply and
power plant engineering. The modular system allows easy
retrofitting and servicing.
The control valves consist of the valve and the actuator. They
can be equipped with pneumatic, electric, electrohydraulic, or
hand-operated actuators. For controlling purposes and travel
indication, accessories such as positioners, limit switches and
solenoid valves can either be attached directly (see page 21
and Information Sheet T 8350 EN) or according to
IEC 60534-6 (NAMUR rib).
The valve bodies are available in cast iron, spheroidal graphite
iron, cast steel, cast stainless or cold-resisting steel, forged steel
or forged stainless steel as well as in special materials. All parts
of the valve and the pneumatic actuator housing in the completely corrosion-resistant version are made of stainless steel.
Refer to the associated data sheets for details.
The Type RVG Pneumatic Control Valve from Welland &
Tuxhorn is used in power plants and in the petrochemical industry to control feedwater and other liquids. The valves are manufactured with globe-pattern and angle-pattern bodies in nominal sizes DN 25 to DN 150 (1” to 6”) with nominal pressures
PN 16 to PN 400 (ANSI Class 150 to 2500).
Series 240
Series 240 Control Valves are available in nominal sizes ranging from DN 15 to DN 300 (½” to 12”) and up to a nominal
pressure PN 40 (Class 300).
Control valves in the standard version are suitable for temperature ranges between –10 and +220 °C (15 and 430 °F). An insulating section allows the temperature range to be extended to
–200 and +450 °C (–325 and +840 °F).
The plug stem is sealed either by a self-adjusting PTFE V-ring
packing or an adjustable packing. To meet stricter emissions
control requirements, a stainless steel bellows is used.
The Type 3241 Control Valve can be equipped with a heating
jacket that may also include the bellows.
Series 280 and W&T
Series 280 Steam-converting Valves are used to reduce both the
steam pressure and steam temperature to optimize plant operation and heat efficiency in process plants, for example, in refineries, food and beverage, tobacco or pulp and paper industries.
Steam-converting valves are based on Series 250 Valves fitted
with a flow divider St III and an additional spray water connection. They are available in nominal sizes ranging from DN 50
to DN 400 (1” to 16”), with nominal pressures of PN 16 to
PN 400 (Class 150 to 2500) and for temperatures up to
500 °C (930 °F).
The Type DUV-C3 Steam-converting Valve from Welland &
Tuxhorn is designed for high-pressure ranges and can be engineered with varying inlet and outlet sizes. The inlet nominal
sizes range from DN 80 to DN 500 and the outlet nominal sizes
from DN 100 to DN 1600.
Large amounts of spray water can be injected thanks to the integrated atomizing steam cooler. The valve can be operated in a
wide load range.
Valves for special applications
These valves have been developed for special requirements including cryogenic valves, valves for food processing, diaphragm control valves and micro-flow control valves.
Series 250
Series 250 Control Valves are used when large nominal sizes
and/or high pressures are involved in process engineering,
power plant or supply engineering.
In addition to globe, three-way and angle valves, four-flanged
valve bodies with bottom plug stem guides, and valves with axial multi-stage throttling plugs, customized valve constructions
to meet customer specifications can be engineered as well.
The valves are manufactured in nominal sizes from DN 15 to
DN 500 (½” to 16”) and for nominal pressures between PN 16
and PN 400 (Class 150 to 2500).
The standard versions of these control valves are suitable for
temperatures ranges between –10 and +220 °C (15 and
430 °F). This temperature range can, however, be extended by
using an adjustable high-temperature packing to a temperature
range between –10 and +350 °C (15 and 660 °F) and by using
a bellows seal or an insulating section to a temperature range
between –200 and +500 °C (–325 and +930 °F).
3
T 8000-1 EN
Table 1a · Series 240 Control Valves and valves for special applications
Control valve
Series 240
For special applications
3241
Type
Data Sheet T … EN
Globe valve
DIN
ANSI
Gas
Oil
TÜV
8015
8012
8020
8022
8016
•
•
•
•
•
Three-way valve for mixing or diverting service
3244
3248
3249
3345
3347
3351
3510
8026
8093
8048
8031
8097
8039
8091
•
•
•
•
Angle valve
DIN
Standard version
•
ANSI
JIS
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Low flow rates
•
Typetested for gas, DIN EN 161
Special
applications
•
Liquid fuels, DIN EN 264
•
Typetested acc. to DIN 32730
•
On-off valves
•
Pharmaceutical/food industries
Cryogenics
Nominal sizes
15...
300
in
PN
15...
100
15...
150
16, 40
16...40
½”...12” ½”...6”
Class
Perm. temperatures and differential pressures
Cast iron, EN-JL1040
15--150
10...40
40
125, 300
JIS
300
15...
150
15...
80
15...
150
15...
125
½”...6”
½”...6”
½”...3”
½”...6”
½”...5”
½”...4” ¼ ”...1”
16...40
16...40
10
10, 16
16
16...40 40...400
150, 300 150, 300 150 psi 125/150 240 psi 150, 300
Spheroidal graphite iron, EN-JS1049
•
•
•
Cast steel, 1.0619
•
•
•
•
•
Cast stainless steel, 1.4581
•
•
•
•
•
Forged steel, 1.0460
•
•
•
•
Forged stainless steel, 1.4571
•
•
•
•
4
•
•
•
•
•
1.4404
•
•
•
•
•
•
•
•
•
•
•
351CF8
•
•
•
G20Mn5, 1.6220 (formerly
1.1138)
•
Special materials
•
•
Metal sealing
•
•
Lapped-in metal
•
•
Soft sealing
•
•
Pressure-balanced
•
•
•
•
•
•
Bellows seal
•
•
Heating jacket
•
•
Low-noise (flow divider)
•
•
•
Flanges
•
•
•
Welding ends
•
•
•
•
•
•
•
•
•
•
•
•
•
•
8012
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
8015
•
•
•
Special end connections
Data Sheet T … EN
300...
2500
•
GX5CrNi19-10, 1.4308
End
connections
10,
15, 25
Refer to associated data sheet
•
Diaphragm seal
Insulating section
15...
100
10/20
KRF
ASTM A 351 CF8M, stainl. steel
Option
•
15...
150
•
Body
ASTM A 126 B, cast iron
material
ASTM A 216 WCC, carbon steel
Plug
•
•
DN
Nominal pressure
•
8020
8022
8016
8026
•
•
•
•
•
•
•
•
•
•
•
•
•
8093
8048
8031
8097
8039
•
8091
T 8000-1 EN
Table 1b · Series 250 Control Valves and W&T valves (see Volume 2 of control valve catalog)
Type
3251
Data Sheet T … EN
Globe valve
Three-way valve for mixing or diverting service
Angle valve
DIN
Standard version
ANSI
DN
Nominal sizes
Nominal pressure
Option
End connections
8053
•
8055
3254
8060
•
3256
8061
•
3259
8065
8066
•
•
•
•
15...200
•
•
•
•
•
Class
•
•
15...25 15...400 80...500
½”...8” ½”...1” ½”...12”
3”...16”
40...400 10...160 16...400
•
•
Cast stainless steel, 1.4581
•
•
1.4404
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
ASTM A 351 CF8M
•
•
•
•
•
•
Lapped-in metal
•
•
Soft sealing
•
•
Pressure-balanced
•
•
•
•
•
3”...1”
10/16
150...
2500
150 lbs 150 lbs
•
•
•
1.4571
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Ceramic trim
•
•
•
•
•
•
•
•
•
•
•
•
•
Bellows seal
•
•
•
•
•
•
•
•
•
Heating jacket
•
•
•
•
•
•
Low-noise (flow divider)
•
•
•
•
•
•
Flange
•
•
•
•
•
•
•
•
Welding ends
•
•
•
•
•
•
•
•
Special end connections
•
•
•
•
•
•
•
8051
8052
8053
8060
8061
8065
8066
0.7043/ 0.7043/
PTFE
PFA
•
•
PTFE
PTFE
•
•
•
Insulating section
8055
1”...6”
16...400 10/16
•
•
•
1”...6”
150...
2500
ASTM A 217 WC6
Special materials
TB 01b
•
IG
325
ASTM A 216 WCC
Metal sealing
TB 01a
•
BR 1d*
9933
•
½”...8”
•
A316L
BR 1b
16...90 25...150 25...150 25...80
16...400
150...
2500
BR 1a
8059
•
15...200
150...
300...
150...
2500
2500
2500
Refer to associated data sheet
G17CrMo5-5, 1.7357
Data Sheet T … EN
W&T
RVG
•
16...400
Perm. temperatures and differential pressures
Cast steel, 1.0619
Plug
8052
•
3253
•
in
PN
Body
material
8051
•
3252
•
•
•
8059
9933
TB 01 a TB 01 b
Table 1c · Steam-converting Valves of the Series 280 and W&T (see Volume 2 of control valve catalog)
Type
Nominal sizes
Data Sheet T … EN
Technical data (DIN/ANSI) acc. to
5
3281
3284
3286
W&T DUV-C3
DN
50 … 200
100 … 400
50 … 200
in
2…8
4 … 16
2…8
8251
8254
8251
9934
Type 3251
Type 3254
Type 3256
−
Inlet: 80... 500
Outlet: 100...1600
Inlet:
3”... 20”
Outlet:
4”... 64”
T 8000-1 EN
Series 240
Type 3241 Globe Valve
(T 8012 EN to T 8022 EN)
This valve is used for a wide range of applications in process
engineering and industrial plants as well as in supply and
power plant engineering. Standard valves are available
conforming to DIN, ANSI und JIS standards.
Valve bodies are manufactured in cast iron, spheroidal
graphite iron, cast steel, cast stainless or cold-resisting steel.
Nominal size
DN 15 … 300
½” … 12”
Nominal pressure
PN 10 … 40
ANSI Class 150 … 300
JIS 10/20 K
Temperature range –200 … +450 °C
–320 … +800 °F
Valve plug with metal sealing, soft sealing, or lapped-in metal.
Further versions are available with adjustable packing, bellows
seal, insulating section, heating jacket or flow divider to reduce
noise emissions.
Type 3241 in forged steel version
(T 8015 EN)
Valve body and bonnet made of forged steel 1.0460 (C22.8) or
forged stainless steel 1.4571.
Nominal size
DN 15 … 80
Nominal pressure
PN 16 … 40
Temperature range –200 … +450 °C
Further specifications and versions are the same as for the
Type 3241 Valve in cast version (see above).
Type 3241-Gas, Pneumatic Control and Quick-acting
Shut-off Valve for gases
(T 8020 EN)
The safety shut-off valves for gas typetested according to DIN
EN 161 can also assume the function of a control valve
(DIN-DVGW-typetested).
The valve is equipped with a solenoid valve and a strainer. The
plug stem is sealed by a corrosion-resistant steel bellows fitted
with a test connection and a backup self-adjusting packing.
The valve bodies are available in cast steel, cast stainless steel,
and forged steel.
Nominal size
DN 15 … 150
½” … 6”
Nominal pressure
PN 40
ANSI Class 300
Medium temperature
Ambient temperature
–20 … +220 °C
–20 … + 60 °C
–4 … 428 °F
–4 … 140 °F
Valve plug with soft sealing.
Type 3241-Oil, Pneumatic Control and Quick-acting Shut-off
Valve for liquid fuels and liquefied petroleum gas in the
liquid phase
(T 8022 EN)
Control valve typetested acc. to DIN EN 264 as a control and
safety shut-off valve for combustion plants burning liquid fuels.
The valve is equipped with a solenoid valve and a strainer.
The valve bodies are available in cast steel, cast stainless steel
1.4571 or forged steel 1.0460.
Nominal size
DN 15 … 100
½” … 4”
Nominal pressure
PN 16 and PN 40
ANSI Class 300
Max. medium temp.
Ambient temperature
350 °C
–15 … +60 °C
662 °F
5 … 140 °F
Valve plug with soft sealing or lapped-in metal.
Further versions available with bellows seal.
Type 3241-7 with
forged steel valve body
Type 3241-1
Pneumatic Control Valve
6
Type 3241-Gas with bellows seal and Type 3241-Oil,
both with positioner, solenoid valve and strainer
T 8000-1 EN
Type 3241 Pneumatic Control Valve with safety function,
typetested
(T 8016 EN)
The control valve typetested according to DIN 32730 can assume the function of a control valve as well as that of a safety
temperature limiter or pressure limiter. The standard version is
suitable for water and steam up to 220 °C, the version with insulating section up to 350°C.
The control valve is equipped with a Type 3701 Solenoid Valve.
Valve bodies available in cast iron, spheroidal graphite iron,
cast steel or cast stainless steel, forged steel and forged stainless
steel.
Valves for special applications
Nominal size
DN 15 … 150
Nominal pressure
PN 16 … 40
Perm. temperature
–200 … +350 °C
Valve plug with metal sealing.
Bellows seal with backup packing.
Special version with aluminum valve body.
Type 3248 Cryogenic Valve
(T 8093 EN)
Control valve used for liquid gases in the field of cryogenic engineering. Installation in cold box or in vacuum-insulated pipelines.
Nominal size
DN 15 … 150 *
½” … 6”
Nominal pressure
PN 10 … 100
ANSI Class 150 … 600
Temperature range –200 … +220 °C
–459 … 428 °F
* DN 200/8” and DN 250/10” on request
Valve plug with metal sealing.
Type 3244 Three-way Valve
(T 8026 EN)
Control valve for mixing and flow-diverting service according to
DIN or ANSI standards.
Mixing or diverting service is determined by the arrangement of
the valve plug at the factory (see valve body on p. 12).
Valve bodies available in cast iron, cast steel, or cast stainless
steel (according to DIN or ASTM specifications).
Nominal size
DN 15 … 150
½” … 6”
Nominal pressure
PN 10 … 40
ANSI Class 150 … 300
Temperature range –200 … +450 °C
Type 3249 Control Valve for aseptic service
(T 8048 EN)
Angle valve for food processing and pharmaceutical industries
according to DIN or ANSI standards. PTFE-coated EPDM diaphragm serves as external sealing; additional test connection
and backup packing.
Nominal size
DN 15 … 80
½” … 3”
Maximum pressure 10 bar
150 psi
Temperature range –10 … +130 °C
14 … 266 °F
Versions are available with threaded coupling, conical coupling and slotted round nut or flanges, as well as flanges or
clamp weld-on coupling conforming to ANSI requirements.
–325 … 800 °F
Valve plug with metal sealing.
Further versions are available with adjustable packing, bellows
seal, insulating section, heating jacket, or additional
handwheel.
Type 3241-1
typetested
Type 3249
Angle valve for
aseptic service
Type 3244-7
Three-way Valve
Type 3248-1 Cryogenic Valve in
globe-pattern and aluminium angle-pattern
7
T 8000-1 EN
Type 3345 Diaphragm Valve
(T 8031 EN)
Control valve for viscous, corrosive and abrasive fluids according to DIN or ANSI standards.
Valve bodies available in cast iron, spheroidal graphite iron, or
cast stainless steel with or without lining.
Valve diaphragm made of butyl, FPM (FKM), or ethylene
propylene (also with PTFE protective facing).
Nominal size
DN 15 … 150
½” … 6”
Nominal pressure
PN 10
ANSI Class 150 … 300
Temperature range –10 … +100 °C
14 … 212 °F
Versions for higher temperatures or with FDA approval for the
food processing industry available on request.
Type 3347 Control Valve for food processing
(T 8097 EN)
Angle valve for food processing and pharmaceutical industries
as well as for in the field of biochemistry equipped with
weld-on, screw or clamp connections.
Suitable for CIP cleaning.
Type 3351 Pneumatic On-off Valve
(T 8039 EN)
Valve for on/off service with tight shutoff for liquids, non-flammable gases and steam.
Valve bodies available in cast iron, cast steel, or cast stainless
steel.
Nominal size
DN 15 … 100
½” … 4”
Nominal pressure
PN 10 … 40
ANSI Class 150...300
Medium temperature
Ambient temperature
–50 … +250 °C
–10 … 90 °C
–20 … 482 °F
14 … 194 °F
Valve plug with both metal sealing and soft sealing
simultaneously.
Self-adjusting PTFE V-ring packing.
Further versions are available with insulating section, bellows
seal, or additional handwheel.
½” … 5”
Type 3510 Micro-flow Valve
(T 8091 EN)
Control valve with either stainless steel globe- or angle-pattern
body designed to control very low flow rates in pilot plants and
technical research facilities.
Maximum pressure 16 bar
240 psi
Nominal size
DN 10, 15, 25
Temperature range –10 … +150 °C
15 … 300 °F
Nominal pressure
PN 40 … 400
Nominal size
DN 15 … 125
Version available in full-mold cast body with threaded end connections complying with 3A und EHEDG regulations.
Temperature range –200 … +450 °C
1 4”, 3 8”, 12”
ANSI Class 150…2500
–328 … 842 °F
Further versions are available with insulating section or bellows
seal.
Type 3510-7
Micro-flow Valve
Type 3347-7 Valve
for food processing
Type 3351-1
On-off Valve
Type 3345-1
Diaphragm Valve
8
T 8000-1 EN
Series 250 and W&T
Type 3251 Globe Valve
(T 8051/52 EN)
Control valve for applications in process engineering and
industrial plants as well as in supply and power plant
engineering. Suitable for large nominal sizes and/or high
pressures according to DIN and ANSI standards.
Valve bodies available in high-temperature, cold-resisting or
cast stainless steel.
Nominal size
DN 15 … 200
Nominal pressure
PN 16 … 400
Temperature range –200 … +500 °C
½” … 8”
ANSI Class 150…2500
Type 3253 Three-way Valve
(T 8055 EN)
Control valve for mixing or flow-diverting service.
Valve bodies available in cast iron, high-temperature,
cold-resisting or cast stainless steel.
Nominal size
DN 15 … 400
½” … 16”
Nominal pressure
PN 10 … 160
ANSI Class 300…2500
Temperature range –200 … +500 °C
–325 … 930 °F
Valve plug with metal sealing.
Further versions are available with bellows seal or insulating
section.
–325 … 930 °F
Valve plug with metal sealing, soft sealing, or lapped-in metal.
Further versions are available with bellows seal, insulating section, heating jacket, flow divider to reduce noise emissions, or
pressure-balanced plug.
Type 3254 Globe Valve
(T 8060/61 EN)
Control valve for process engineering applications according to
DIN or ANSI standards.
Valve bodies available in cast iron, high-temperature,
cold-resisting or cast stainless steel.
Type 3252 High-pressure Valve
(T 8053 EN)
Control valve with either globe- or angle-pattern body to control
low flow rates in process engineering applications.
Valve bodies available in cast stainless steel.
Nominal size
DN 80 … 500
Nominal pressure
PN 10 … 400
Nominal size
DN 15 … 25
½” … 1”
Nominal pressure
PN 40 … 400
ANSI Class 300…2500
Temperature range –200 … +450 °C
–320 … 800 °F
Valve plug with metal sealing.
Further versions are available with bellows seal or insulating
section. End connections with female thread, welding ends, or
flanges. Other valve body materials available on request.
Type 3251
Globe Valve
9
Type 3252
High-pressure Valve
Temperature range –200 … +500 °C
3” … 16”
ANSI Class 150…2500
–320 … 930 °F
Valve plug with metal sealing, soft sealing, or lapped-in metal.
The valve has an additional plug stem guide in the bottom body
flange.
Further versions are available with bellows seal, insulating section, heating jacket, flow divider to reduce noise emissions, or
pressure-balanced plug.
Type 3253
Three-way Valve
Type 3254
Globe Valve
T 8000-1 EN
Type 3256 Angle Valve
(T 8065/66 EN)
Control valve for process engineering applications according to
DIN or ANSI standards.
Valve bodies available in high-temperature, cold-resisting cast
steel or cast stainless steel.
W&T Type RVG Control Valve
(T 9933 EN)
Single- or multi-stage control valve for power plant applications
or the petrochemical industry for feedwater and steam.
Valve bodies available in forged steel in globe- or angle-style or
Z-style bodies according to DIN or ANSI standards. Application as feedwater, spray or recirculation valve.
Nominal size
DN 15 … 200
½” … 8”
Nominal pressure
PN 16 … 400
ANSI Class 300…2500
Nominal size
DN 25 … 150
–325 … 930 °F
Nominal pressure
PN 16 … 400
Temperature range –200 … +500 °C
Temperature range –200 … +450 °C
1” … 6”
ANSI Class 150…2500
–328 … +842 °F
Valve plug with metal sealing, soft sealing, or lapped-in metal.
Further versions are available with bellows seal, insulating section, heating jacket, flow divider to reduce noise emissions, or
pressure-balanced plug.
Lined valves
Type 3259 Angle Valve
(T 8059 EN)
Control valve for industrial plants with high pressure requirements according to the IG standard
Valves suitable for corrosive media, in particular, to meet high
requirements in chemical plants. Streamlined valve body made
of spheroidal graphite iron EN-JS1049. Exchangeable PTFE
valve seat and PTFE plug, plug stem sealed by a special PTFE
bellows and an additional packing with test connection.
Nominal size
DN 16 … 90 *
Nominal pressure
PN 325
Pfeiffer Type BR 1a
(TB 01a EN)
Globe valve with 5 to 8 mm isostatic PTFE lining
Temperature range –200 … +450 °C
* Nominal size DN 120 on request
The valve body is made of forged stainless steel and the end
connections are designed as screwed-on flanges with lens ring
gaskets.
Valve plug with metal sealing or lapped-in metal.
Nominal size
DN 25 … 150
1” … 4”
Nominal pressure
PN 10 … 16
ANSI Class 150
Temperature range Up to 200 °C
Up to 390 °F
Pfeiffer Type BR 1b
Globe valve with 4 to 5 mm thick PFA lining
(TB 01b EN)
Nominal size
DN 25 … 80
1” … 3”
Nominal pressure
PN 10 … 16
ANSI Class 150
Temperature range Up to 200 °C
Up to 390 °F
Other linings and materials available on request.
Pfeiffer Type BR 1a
PTFE-lined Globe Valve
Type 3256
Angle Valve
10
Type 3259 Angle Valve
acc. to IG standard
W&T Type RVG
Globe Valve
Pfeiffer Type BR 1b
PFA-lined Globe Valve
T 8000-1 EN
Series 280
Control valves for process engineering or for heat efficiency to
reduce steam pressure and steam temperature simultaneously.
Type 3281 and Type 3286 Steam-converting Valves
(T 8251 EN)
Globe valve (Type 3281) or angle valve (Type 3286) according
to DIN or ANSI standards.
Nominal size
DN 50 … 200
Nominal pressure
PN 16 … 400
Temperature range Up to 500 °C
2” … 8”
ANSI Class 300…2500
Up to 930 °F
Type 3284 Steam-converting Valve
(T 8254 EN)
Globe valve with four-flanged body and double-guided plug
stem according to DIN or ANSI standards.
Nominal size
DN 100 … 400
Nominal pressure
PN 16 … 400
Temperature range Up to 500 °C
Type 3281
Steam-converting Valve
11
W&T Type DUV-C3 Steam-converting Valve
(T 9934 EN)
Steam-converting valve for power plant engineering and industrial processes.
Inlet
DN 80 … 500
PN 16 … 630
3” … 20”
Class 150 … 2500
Outlet
DN 100 … 1600
PN 16 … 100
4” … 64”
ANSI Class 150…900
Temperature range Up to 560 °C
Up to 1040 °F
Valve bodies available in forged steel 1.0460 (A105),
heat-resisting forged steel 1.5415, 1.7335/A 182 F12 or
1.7380/A 182 F22.
Special features include at least two-staged controlled perforated plug, at least one uncontrolled attenuation plate and an
integrated atomizing steam cooler.
4” … 16”
ANSI Class 300…2500
Up to 930 °F
Type 3284
Steam-converting Valve
W&T Type DUV-C3
Steam-converting Valve
T 8000-1 EN
Control valve details
Three-way valve
(T 8026 EN)
Three-way valves are used for mixing or flow-diverting service.
Valve bodies and styles
The valve body, valve bonnet and, in some cases, the bottom
flange are subject to internal stress caused by the process medium flowing through the valve. Consequently, the valves must
be designed to be sufficiently resistant to mechanical and chemical stress.
Under the influence of the operating temperature, the material
strength changes. This behavior can be improved by combining
certain alloys. For this reason, heat-resisting materials are used
at high temperatures ( e.g. according to DIN EN 10213-1) and
cold-resisting materials are used for cryogenic service. The materials table on page 27 and the AD Specification Sheet W 10
provide a summary.
Globe valve
(T 8015 EN, T 8060 EN)
Globe valves allow easy installation in straight pipelines. For
nominal pressures up to PN 40 and nominal sizes up to
DN 300, three-flanged bodies of the Series 240 are mainly
used. The plug stem is guided in the valve bonnet, and the
V-port plug in the screwed-in seat.
The ports of the V-port plug are asymmetric in order to suppress
any oscillations.
Mixing service with Type 3244 Three-way Valve
The mode of operation depends on how the two plugs are arranged. The direction of flow is indicated by arrows.
Flow-diverting service with Type 3244 Three-way Valve
Type 3241 Globe Valve
To handle higher load levels and when larger seat diameters
are used, the Type 3254 Globe Valve of the Series 250 is provided with an additional plug stem guide in the bottom flange.
Additional plug stem guide in Type 3254
12
Angle valve
(T 8065 EN)
Angle valves are ideally installed when a vertical pipeline and a
horizontal pipeline need to be connected. The process medium
is only diverted once. Angle valves allow the condensate to be
optimally treated, and are practically entirely self draining.
In case the process medium is in the flow-to-close direction,
wear in the valve outlet can be reduced by the use of an
anti-wear sleeve.
For process media containing solids, the outlet of the Type 3256
Control Valves can additionally be fitted with a ceramic
wear-resistant pipe.
Type 3256 Angle Valve
T 8000-1 EN
Cryogenic valve
(T 8093 EN)
Plants that produce liquefied, cryogenic air separation gases,
often use vacuum-insulated pipelines to prevent environmental
heat being transferred to the medium. The control valves can be
integrated in the vacuum jacket by means of a connecting
flange. The valve is designed to widely prevent thermal conduction to the effect that the stem remains free of ice. A bellows seal
serves as the primary sealing.
The jacketed pipeline is evacuated of air and sealed off after installation of the components. The cryogenic extension bonnet of
the control valve is often welded to the jacketed pipeline via a
flange, meaning considerable work would be involved to
remove the valve from the pipeline. However, to make maintenance possible, the internal parts can be accessed via the cryogenic extension bonnet without having to remove the valve from
the pipeline.
Valve for food processing
(T 8048 EN, T 8097 EN)
Valves for food processing are angle valves made of stainless
steel. The internal surfaces exposed to the process medium are
machined to a fine finish or polished. The valve bodies are
self-draining and can be cleaned (CIP) or sterilized (SIP) without
having to be disassembled. The stem of Type 3249 is sealed by
a special diaphragm, preventing bacteria from being trapped.
Type 3249 Valve for food processing
The Type 3347 Control Valve is available with welding ends, a
threaded or a clamp connection according to ISO 2852, and
with a steam line connection if higher purity requirements are to
be met.
Type 3347 with steam line connection
Type 3248 Cryogenic Valve
Diaphragm valve
(T 8031 EN)
For viscous or corrosive media possibly containing solids, diaphragm control valves that are free of dead space and without
stuffing boxes are an economical solution. The diaphragm may
be made of rubber, nitrile, butyl or PTFE. The valve body may
additionally be lined with rubber or PTFE.
Type 3345 Diaphragm Valve
13
T 8000-1 EN
On-off valve
(T 8039 EN)
The valve for on-off service is used for tight shutoff of liquids,
non-flammable gases and steam. As the valve plug is equipped
with both a metal sealing and a soft sealing, the leakage flow
rate class VI is achieved.
Type 3351 On-off valve
Valve bonnets
The valve bonnet closes the valve at the top and provides room
for the stuffing box and the plug stem guide. The valve bonnet
and the yoke of Series 240 Valves are incorporated in one
piece. The valve bonnet and the yoke of Series 250 and 280
Valves are bolted together. The NAMUR rib standardized in
IEC 60534-6 located on the yoke allows easy, standardized attachment of a positioner or other accessories. The valve bonnet
is a pressure-bearing part that is exposed to the process medium, therefore its material is subject to the same design requirements as the valve body.
Packing
The plug stem is sealed by the packing. Versions with bellows
seal or insulating section or when the packing functions as a
backup packing use the standard packing.
The temperature range of the standard packing is between –10
and 220 °C and can be extended when an insulating section is
fitted on the valve bonnet.
Micro-flow valve
(T 8091 EN)
Micro-flow valves are used for very low flow rates (KV coefficients <1.6 to 10–5 m3/h).
The parts exposed to the process medium are made of stainless
steel 1.4571. All valve parts are made of semi-finished products. As a result, special materials can be used in a particularly
cost-effective manner, and the valve covers a wide range of applications.
Valve bonnet of Series 240 Valves
Other packings can be installed for special applications.
Type 3510 Micro-flow Valve
Steam-converting valve
(T 8251/4 EN)
Steam-converting valves are used to reduce the steam pressure
and the steam temperature simultaneously. A connecting pipe
supplies the spray water to the flow divider St III. At its inner
wall, the spray water comes into contact with the steam flow.
The steam flow and the entrained water are mixed in the narrow
wire mesh of the flow divider. As the supplied spray water does
not come into contact with the valve body, neither erosion nor
thermal shock occur. The flow divider ensures low-noise and
low-vibration operation.
Packing forms
Standard packing
Temperature range
–10 ... +220 °C
Self-adjusting, spring-loaded V-ring packing made of
PTFE-carbon for nominal sizes DN 15 to DN 150.
Self-adjusting PTFE-carbon/PTFE-silk packing for nominal
sizes DN 200 to DN 500.
Suitable for all applications that require a high level of sealing performance, yet requiring hardly any maintenance.
Valve bonnet for Series 250 Valves
Type 3281Steam-converting Valve
14
T 8000-1 EN
Form A
Adjustable, cavity-free PTFE-silk/PTFE-carbon packing.
Especially suitable for process media that crystallize out or
polymerize.
Form B
Adjustable, cavity-free PTFE-silk/pure PTFE packing.
PTFE-silk for nominal sizes DN 200 to DN 500.
Suitable for process media that crystallize out or polymerize
and in case carbon particles would contaminate the process
medium.
Steam line connection
The Type 3347 Control Valve can be provided with a valve
bonnet including a steam line connection to meet the
requirements regarding purity in the food processing and
pharmaceutical industries. Steam or a sterilizing liquid flushes
the plug stem between the two PTFE V-ring packings to prevent
bacteria from being trapped.
Form C
Adjustable, cavity-free packing made of woven PTFE-silk.
Application for all chemicals including hot acids and alkaline solutions.
Form D
Spring-loaded V-ring packing made of pure PTFE.
Suitable for pure process media in case carbon particles
would contaminate the process medium.
Form H
Adjustable high-temperature packing made of graphite
and carbon rings.
Especially suitable for superheated steam.
Form S
Spring-loaded V-ring packing made of PTFE-carbon with
BAM approval (German Institute for Materials Research
and Testing).
Suitable for oxygen service (only when BAM-approved lubricant is used).
Form W
Adjustable, cavity-free packing made of PTFE-graphite
thread and carbon for fresh and service water. The carbon
bushings serve as wipers.
Especially suitable for hard water and any process media
that may cause deposits forming on the plug stem.
NACE standard
Spring-loaded V-ring packing made of PTFE-carbon conforming to NACE standard.
Suitable for sour gas/sour water.
ADSEAL
Spring-loaded V-ring packing made of PTFE-carbon with
ADSEAL emergency adjusting function.
Packing versions for extended application conditions available
on request.
15
Steam line connection in Type 3347
Seat and plug trims
The design of the seat and the plug determines the KVS coefficient and the characteristic as well as the seat leakage rate of a
valve. The drawings show seat-guided V-port plugs with asymmetric ports with metal sealing and soft sealing.
Metal sealing
Soft sealing
The seat, plug, and plug stem are made of stainless steel. In
some cases, the trim elements are subject to high stress due to
high differential pressures, cavitation, flashing, or in cases
where the process media contains solids. In order to increase
the service life, seats and plugs with metal sealing can be provided with a Stellite hard facing, and plugs up to DN 100 can
be made of solid Stellite.
The seats are screwed into place, allowing them to be easily exchanged. They may also be made of other materials.
T 8000-1 EN
Seat leakage rate
The seat leakage rate is determined according to DIN EN 1349
which specifies the maximum amount of the test process
medium (gas or water) that may flow through the closed control
valve under test conditions.
For special applications (e.g. using Type 3241-Gas or
Type 3241-Oil) or with shut-off valves (Type 3351), a high
leakage rate class can be achieved by using a lapped-in metal
or a soft sealing.
Table 2 · Plug sealing and seat leakage rate
Leakage rate class acc.
to DIN EN 1349
Seat leakage
% of KVS
IV
≤ 0.01
Lapped-in metal
up to DN 80
IV-S2
≤ 0.0001
Lapped-in metal
in DN 100 or larger
IV-S1
≤ 0.0005
Soft sealing
VI
0.3 · ∆p · fL 1)
PTFE ring with
pressure balancing
IV
≤ 0.01
Graphite ring with
pressure balancing
III
≤ 0.1
Seat/plug sealing
Metal sealing
1)
Control valves with ceramic trims
(T 8071 EN)
Control valves with extremely resistant ceramic trims are used
when the valve body and the trim are subject to considerable
erosion and abrasion.
The following valves can be fitted with ceramic trims:
Type 3251 Globe Valve,
Type 3256 Angle Valve.
The Type 3256 Angle Valve can be fitted with a ceramic
wear-resistant pipe. When the process medium flows in the
flow-to-close (FTC) direction, this version is suitable for extreme
erosive and abrasive conditions caused by process medium
containing solids.
Details on ceramic materials and their properties are available
on request.
Leakage factor fL according to DIN EN 1349
Pressure balancing
If the actuator force is not sufficient to handle the differential
pressure, pressure-balanced plugs are a good solution. The
plug is designed to function as a piston. The upstream pressure
p1 is transferred to the back of the plug via a borehole in the
bottom of the plug. The forces acting on the plug are compensated for with exception of the area around the plug stem.
Pressure-balanced plugs are additionally sealed with a PTFE
ring or a graphite ring. The pressure-balanced components are
subject to wear. As a result, the seat leakage rate (see Table 2)
and the amount of maintenance needed for these valves
increase. Pressure-balanced plugs should not be used, if at all
possible, for high-temperature process media or for media that
contain solids or crystallize out. In these cases, we recommend
to use a more powerful actuator.
Type 3256 Angle Valve with ceramic trim and wear-resistant pipe
Low-noise operation
Flow dividers
(T 8081 EN)
The flow dividers St I and St III serve to reduce the noise emission
of gases and vapors. The process medium reaches its maximum
velocity after passing the restriction between seat and plug. Before it starts to create a noise-intensive, turbulent mixing zone,
the process medium hits the inner wall of the flow divider. The
flow is divided and a low-noise impulse exchange with the surrounding medium takes place.
Flow divider St I and St III
Plug with pressure balancing
16
The valve-specific correction values for gases and vapors are
required for noise calculation according to VDMA 24422, Edition 1989 and DIN EN 60534 when flow dividers are used. Refer to the diagrams on page 24 for details.
For further details regarding noise calculation, refer to the DIN
EN 60534 standard or contact us and we will perform these
calculations for you.
The KVS coefficient of the valve trim is reduced on using a flow
divider.
The associated data sheets include the KVS I for the flow divider
St I and KVS III for the flow divider St III.
T 8000-1 EN
AC trims
(T 8082/3 EN)
AC-1 and AC-2 Trims are optimized trims for low-noise
pressure letdown of liquids at differential pressures up to
40 bar. The seat is raised and the parabolic plug is additionally
guided in the seat.
The AC-2 Trim additionally has up to four attenuation plates.
AC-1 Trim
Additional components
Bellows seal
In case, stricter emissions control requirements must be met, e.g.
TA-Luft or in vacuum applications, a metal bellows is used to
seal the plug stem. The plug stem is additionally sealed with a
packing at the top flange. This packing serves as a backup
packing.
The metal bellows can be monitored for leakage or a sealing
medium can be applied by means of a test connection.
The bellows seal can be used for valves of
Series 240 from –200 to +400 °C, and
Series 250/280 from –200 to +450 °C.
AC-2 Trim
The three-staged AC-3 Trim is used for differential pressures up
to 100 bar. Optionally, stellited hard facings or hardened trims
are available.
Metal bellows seal
Insulating section
The application range of a standard packing can be extended
to an operating temperature of less than –10 °C or over
+220 °C by using an insulating section.
Type 3251 with AC-3 Trim
Silencer
The silencer acts as a fixed restriction that can be installed
downstream of the valve with one to five attenuation plates for
applications with gases or vapors. The silencer increases the
backpressure downstream of the valve which leads to a reduction in the valve outlet velocity and sound pressure level.
Insulating section
Type 3381 Silencer attached to Type 3241 Valve
Sandwich version for mounting between flanges when one
attenuation plate is used · Body accommodating 2 to 5
attenuation plates that can be flanged onto a valve · Extended
nominal size of the outlet
17
The temperature ranges of the various valves series are:
Series 240
–200 ... +450 °C
Long insulating section
–50 ... +450 °C
Short insulating section
Series 250
–200 ... +500 °C
Series 280
max. +500 °C
The temperature ranges specified above may be restricted by
the materials used as per the pressure-temperature diagram
(see Information Sheet T 8000-2 EN).
T 8000-1 EN
Heating jacket
Some process media only flow easily above a certain temperature. Below this temperature they start to solidify or crystallize
out. The valve bodies are fitted with a heating jacket to ensure
that the process medium remains at a certain temperature and
can flow freely. The valve bonnet may also be equipped with a
heating jacket when the plug stem is sealed by a bellows seal.
Class
Types 3241, 3251, 3254, 3281 and 3284
Globe Valves
600
DIN EN 558-2, Series 39 (ISA 75.03)
900
ASME B 16.10, Class 900, column 5
1500
ASME B 16.10, Class 1500, column 5
2500
ASME B 16.10. Class 2500, column 4
Type 3256 and Type 3286 Angle Valve
125/150 DIN EN 558-2, Series 40
250/300 DIN EN 558-2, Series 41
600
DIN EN 558-2, Series 42
900
ASME B 16.10, Class 900, column 7
1500
ASME B 16.10, Class 1500, column 7
2500
ASME B 16.10, Class 2500, column 6
Versions with welding-neck ends are not standardized. Consult
SAMSON first concerning their face-to-face dimensions..
Type 3241 with heating jacket and with bellows heating
Types of pipe connections
A heat transfer medium flowing between valve body and heating jacket ensures that the process medium is kept at a certain
temperature. If steam is used as heating transfer medium,
proper condensate discharge must be ensured. Versions with
connecting flange heating or enlargened connecting flanges for
the body are available on request.
Face-to-face dimensions
SAMSON control valves with flanges have the same
face-to-face dimensions as valves with welding ends.
The face-to-face dimensions are defined according to DIN EN
as follows:
PN
Flanged connections are most frequently used in industrial
plants as they allow easy mounting and removal of valves and
their milled facings provide excellent sealing reliability and
quality.
A summary of DIN flanges, their connection dimensions and
types of flange faces for valves up to PN 100 is provided in
DIN EN 1092-1 and 1092-2, for valves with PN 160 or higher
in DIN 2500, DIN 2501, and DIN 2526.
The standard version of SAMSON valves has flanges with
raised faces in Form B1. Other flange forms are available on request.
DIN flanges in Form B1 (Raised Face)
Types 3241, 3251, 3254, 3281 and 3284
Globe Valves
10... 40 DIN EN 558-1, Series 1
63...100 DIN EN 558-1, Series 2
160
DIN 3292 Part 1 (edition 09.84), Series F2
250
DIN 3292 Part 1 (edition 09.84), Series F3
320
DIN 3292 Part 1 (edition 09.84), Series F3
400
Consistent with ASME B16.10 Class 2500, column 4
Type 3256 and Type 3286 Angle Valves
Form C (Tongue)
Form E (Male Face)
Form D (Groove)
Form F (Female Face)
10... 40 DIN EN 558-1, Series 8
63...100 DIN EN 558-1, Series 9
160
DIN 3202 Part 1 (edition 09.84), Series F 33
250
0.5 x values from DIN 3202 Part 1
(edition 09.84), Series F 3
320
400
Consistent with ASME B16.10, Class 2500, column 4
(halved values)
ANSI valves with flanges or welding ends
Class
Types 3241, 3251, 3254, 3281 and 3284
Globe Valves
125/150 DIN EN 558-2, Series 37 (Class 150: ISA 75.03)
250/300 DIN EN 558-2, Series 38 (ISA 75.03)
18
The US standard for flanges is ANSI/ASME B16.1 for
Class 125 and ANSI/ASME B16.5 for higher pressure ratings.
The standard version of cast iron valves with a pressure rating of
Class 125 has flanges with flat faces.
Valves with a pressure rating of Class 300 have flanges with
raised faces (0.06” height), and valves with higher pressure ratings have flanges with raised faces (0.25” height). Other versions are possible. More details available on request.
For critical process media and/or high pressure ratings, the
valve bodies can be supplied with welding ends or
welding-neck ends.
T 8000-1 EN
For control valves according to DIN standards, the welding
ends conform to EN 12627.
For control valves according to US standards, the welding ends
are specified in ASME/ANSI B16.25.
For installation methods according to US standards, valves of
the Series 240 are available with NPT female thread in sizes ½”
to 2”.
Inherent characteristic
The characteristic shows the relationship between the KV flow
coefficient and the travel (H).
Control valves are either designed with an equal percentage
(2) or with a linear (1) characteristic.
The equal percentage characteristic can be identified by equal
increments of travel that yield equal percentage increments of
the KV flow coefficient.
Whereas, in a linear characteristic, equal increments of travel
yield equal increments of the KV flow coefficient.
Valve-specific parameters
KVS coefficient
The necessary KV coefficient is calculated according to
DIN EN 60534 from the specified operating data.
The KVS coefficient is specified in the data sheets to identify the
valves. It corresponds to the KV coefficient at the rated travel
H100. In order to increase control accuracy and with regard to
manufacturing tolerances, the selected KVS coefficient must be
higher than the KV coefficient.
Rangeability
The rangeability is the quotient of KVS/KVR. KVR being the
smallest KV where the characteristic still lies within the
permissible gradient tolerance of the characteristic
(DIN EN 60534 Part 2-4).
19
Valve characteristic: 1- linear, 2 - equal percentage
T 8000-1 EN
Actuators
Actuators convert the control signal issued, for example, by a
positioner into a travel motion carried out by the control valve
(plug stem with valve plug).
We supply pneumatic, electric and electrohydraulic actuators
as well as hand-operated actuators (see Information Sheet
T 8300 EN).
Pneumatic actuators
These are used for pneumatic or electropneumatic control
equipment. Pneumatic actuators are diaphragm actuators with
a rolling diaphragm and internally fitted springs. The benefits of
pneumatic actuators include their low overall height, strong positioning force and fast response.
Different signal pressure ranges are available. Pneumatic actuators are suitable for use in hazardous areas as well as featuring a fail-safe action: Upon air supply failure, the control valve
is either closed or opened.
The Type 3277 Pneumatic Actuators allow direct attachment of
positioners or limit switches. This prevent the travel linkage from
being misaligned as it is located within the yoke below the actuator housing.
Pneumatic actuators can additionally be equipped with a
handwheel (see T 8310-1 EN and T 8310-2 EN).
Electric actuators
If compressed air is not available, electric actuators with strong
positioning forces and large travels may be used. These actuators are self-locking.
Electric actuators are connected to three-point stepping controllers, electric positioners issuing analog signals or over a reversing contactor unit (see T 8330 EN).
Electrohydraulic actuators
These actuators are connected to an analog signal via
three-point stepping controllers or electric positioners. Versions
with fail-safe action are available (see T 8340 EN).
Type 3277 Pneumatic Actuator
Type 3271 Pneumatic Actuator
with additional handwheel
Type 3275
Pneumatic Piston Actuator
Type 3374 Electric Actuator
Type SAM Electric Actuator
with manual override
Hand-operated actuators
They are attached to Series 240 and 250 Control Valves which
are used as hand-operated control valves with rated travels of
15 or 30 mm (see T 8312 EN). Hand-operated actuators with
larger travels are available on request (Type 3273-5/6).
Type 3274
Electrohydraulic Actuator
Type 3273 Hand-operated Actuator
20
T 8000-1 EN
Accessories for control valves
SAMSON control valves can be equipped with several additional accessories. These accessories are, for example, used for
actuator control and travel indication. They are attached either
according to IEC 60534-6 (NAMUR rib) or directly in conjunction with the Type 3277 Pneumatic Actuator (see T 8310-1 EN).
For direct attachment, the entire travel linkage is located in a
closed housing in order to prevent contamination, misalignment
as well as personal injury (see Information Sheet T 8350 EN for
details).
Positioners
Positioners (p/p or i/p) compare the signal of pneumatic or
electric control equipment to the travel (manipulated variable)
of the control valve. They issue a pneumatic signal pressure as
the output variable. The positioners can be used in standard operation or in split-range operation (see T 8351 EN ff.).
Positioners from the Series 3730 include an integrated firmware for valve diagnostics which issue alerts for predictive
maintenance action (EXPERT and EXPERT+, see T 8388 EN).
Smart versions (HART, PROFIBUS-PA, FOUNDATION™
Fieldbus) are configured and operated using a PC or handheld
terminal (see T 8380/-82/-83/-84 EN).
SAMSON’s own TROVIS-VIEW software serves as a standard
operator interface to operate these smart positioners (see
T 6661 EN).
Type 3730-2
Positioner
Limit switch,
position transmitter or
potentiometer
Solenoid valve
Limit switches
Whenever an adjustable limit value is exceeded or not reached,
a signal is issued. Inductive limit switches are frequently used.
However, versions with electric or pneumatic microswitches are
also available (see Information Sheet T 8350 EN).
Position transmitter/potentiometer
To indicate the travel position of a control valve, the rated travel
range is represented by an analog electric signal (see
T 8363 EN).
Solenoid valves
The binary signals from control equipment are converted into
binary pneumatic control signals. As a result, the control valve
can quickly be brought into its final position. The solenoid
valves are used for on-off valves or for control valves with
fail-safe position (e.g. Type 3241 typetested, T 8016 EN; T
3701 EN).
Lock-up valve
Pneumatic
remote adjuster
Lock-up valve
If the supply air pressure falls below an adjusted value, the signal pressure line is shut off. When this happens, the actuator
stops in its last position (see T 8391 EN).
Pneumatic remote adjuster
Manually adjustable precision regulator for the set point adjustment of pneumatic control equipment.
Supply pressure regulators
Supply pressure regulators provide pneumatic control valves
with a constant air pressure (adjustable between 0 and 6 bar)
(see T 8546 EN).
Supply pressure regulator with air filter
They consist of a supply pressure regulator and an air filter
holding back foreign particles, oil and/or condensate (see
T 8546 EN).
21
Supply pressure regulator without and with air filter
Pneumatic volume booster
The actuating time can be made shorter for fast control loops by
using pneumatic volume boosters.
T 8000-1 EN
Valve sizing
Calculating the KV coefficient
The KV coefficient is calculated according to DIN EN 60534.
The data sheets contain the necessary device-specific
specifications.
A preliminary, simplified calculation may be made with the help
of the working equations listed below. They do not take into account the influence of the connecting fittings or choked flow at
critical flow velocities.
Selecting the valve
After calculating the KV coefficient, the corresponding KVS
coefficient of the valve type in question is selected from the data
sheet.
In case, real operating data are used in the calculation, the
following generally applies: Kvmax ≈ 0.7 to 0.8 · KVS.
p1
p2
H
Q
W
ρ
Pressure upstream of the valve
Pressure downstream of the valve
Travel
Flow rate in m3/h
Flow rate in kg/h
Density in kg/m3
(generally also with liquids)
Upstream density in kg/m3
(with gases and vapors)
Temperature in °C upstream of
the valve
ρ1
t1
Medium
Liquids
m3/h
Pressure drops
p2 >
∆p <
p2 <
∆p >
Gases
m3/h
kg/h
p1
2
KV =
p1
2
p1
2
KV = Q
ρ
1000 ∆p
KV =
Steam
QG
519
kg/h
ρG T 1
∆p p 2
KV =
W
519
T1
ρ G ∆p p 2
kg/h
KV =
W
3162
.
v2
∆p
KV =
W
2v *
p1
3162
.
W
1000 ρ ∆p
KV =
p1
2
QG
ρG T 1
259.5 p 1
KV =
W
T1
259.5 p 1 ρ G
Including:
p1
[bar]
Absolute pressure pabs
ρ
[kg/m3]
p2
[bar]
Absolute pressure pabs
ρG
[kg/m3]
Density of gases at 0 °C and 1013 mbar
∆p
[bar]
Absolute pressure pabs
v1
[m3/kg]
Specific volume (v´ from steam table) for p1 and t1
T1
[K]
273 + t1
v2
[m3/kg]
Specific volume (v´ from steam table) for p2 and t1
v*
[m3/kg]
Specific volume (v´ from steam table) for
QG [m3/h]
22
Flow rate of gas,
based on 0 °C and 1013 mbar
Density of liquids
p1
2
and t1
T 8000-1 EN
Noise prediction
xFz factor
The valve-specific xFz factor is measured on the valve test bench
and provides the basis for noise prediction.
When the load of the valve is y = 0.75, this factor indicates the
pressure ratio at which cavitation begins.
Table 3a · Series 240
KVS
0.1 · 0.16
0.4 0.63 1.0
0.25
Seat ∅
mm
3
1.6
6
2.5
4.0
6.3
12
Travel
mm
10
24
16
25
35
31
38
48
60
63
80
63
15
100 160 200 250 260 360 630 1000 1500
80
30
100 110 125 130 150 200 250 300
15
30
60
30
60
120
xFz · Acoustically determined valve factor
DN
15
0.8
0.8 0.75 0.65 0.65 0.6 0.55
20
0.8
0.8 0.75 0.65 0.65 0.6 0.55 0.45
25
0.8
0.8 0.75 0.65 0.65 0.6 0.55 0.45 0.4
32
0.8 0.75 0.7
0.7
0.6 0.55 0.5 0.45 0.4
40
0.8 0.75 0.7
0.7
0.6 0.55 0.5 0.45 0.4 0.35
50
0.8 0.75 0.7
0.7
0.6 0.55 0.5 0.45 0.4 0.35 0.35
65
0.35 0.35 0.25
80
0.35 0.35 0.25
100
0.25
0.25
0.25 0.2
125
0.25 0.2
150
0.2
0.2
0.2
0.2
0.2
200
0.2
0.2
0.2
250
0.2
0.2
0.2
0.2
300
0.2
0.2
Table 3b · Series 250
KVS
0.1 · 0.16
0.63
0.25 · 0.4
Seat ∅
mm
1.0
6
1.6
2.5
4.0
12
Travel
mm
6.3
10
24
16
25
40
63
100
160
250
360
630
1000 1500 2000 2500
31
38
50
63
80
100
125
150
200
250
15
30
60
300
120
15
0.8
0.75
0.65
0.65
0.6
0.55
25
0.8
0.75
0.65
0.65
0.6
0.55
0.45
0.4
40
0.8
0.75
0.65
0.65
0.6
0.55
0.5
0.45
0.4
0.35
0.6
0.55
0.5
0.45
0.5
0.4
0.35
0.55
0.5
0.45
0.55
0.45
0.35
0.25
0.25
0.55
0.45
0.35
0.3
0.25
0.25
0.3
0.25
0.25
0.2
200
0.25
0.25
0.2
0.2
0.2
250
0.25
0.25
0.2
0.2
0.2
0.2
0.25
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
80
100
150
300
400
23
400
xFz · Acoustically determined valve factor
DN
50
350
0.2
0.2
T 8000-1 EN
Gases and vapors
The noise emission of single-stage and multi-stage control
valves for gases is determined according to DIN EN 60534,
Part 8-3. This calculation method, however, does not apply to
control valves with noise-reducing equipment such as flow dividers St I and St III. In this case, the calculation must be carried
out according to VDMA 24422, Edition 89.
The calculation is based upon the jet power reached on expansion. The noise emission is determined by means of an acoustical conversion coefficient η G. Diagram 1 illustrates the difference between the conversion coefficients depending on the differential pressure ratio. This clearly shows the level difference of
the internal sound powers and the sound pressure levels to be
expected at one meter distance from the pipeline.
For a differential pressure ratio of, for example, x = 0.5, the difference in sound pressure levels between a valve with and without flow divider is –20 dB.
Liquids
The noise emission on throttling liquids is calculated according
to DIN EN 60534, Part 8-4. This calculation is consistent with
the calculation according to VDMA 24422, Edition 89. It is
based on the jet power reached in the valve and also on the
valve-specific acoustical conversion coefficient η F empirically
determined according to VDMA 24423 for turbulent flows as
well as the valve-specific pressure ratio xFz at the beginning of
cavitation.
The sound power level and the sound level difference at a distance of 1 m for the valves with different xFz values can be seen
in the diagram 2.
For a pressure ratio of xF = 0.5, and a valve with xFz = 0.6, the
sound level which is 20 dB less than that of a valve with
xFz = 0.3.
ηG [dB]
0
-20
1
1 - Without flow divider
-40
2
2 - With flow divider St I
3
-60
3 - With flow divider St III
-80
-100
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1 x
Diagram 1
ηF [dB]
0
xFz
-20
z=0.2 z=0.3 z=0.4 z=0.5 z=0.6 z=0.7 z=0.8
-40
-60
-80
-100
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1 x
Diagram 2
24
T 8000-1 EN
Materials conforming to DIN and ANSI/ASME
Selection and ordering
The body materials mainly used and their temperature limits are
listed in the table below.
The application limits of these materials are included in the associated pressure-temperature diagram in the second part of
this Information Sheet (T 8000-2 EN).
Selection and sizing of the control valve
1. Calculate the required KV coefficient according to
DIN EN 60534. You may use, for example, the SAMSON
valve sizing software. This sizing usually is carried out by
SAMSON.
If real operating data are used for the calculation, the
following generally applies: KVmax = 0.7 to 0.8 · KVS.
2. Select the KVS coefficient and the nominal size DN
according to the table in the corresponding data sheet.
3. Select the appropriate valve characteristic on the basis of
the behavior of the controlled system.
4. Determine the permissible differential pressure ∆p and
select an appropriate actuator using the differential
pressure tables included in the associated data sheet.
5. Select the materials to be used with regard to corrosion,
erosion, pressure and temperature using the materials
tables and the associated pressure-temperature diagram.
6. Select the additional equipment, such as positioners and/
or limit switches.
Table 4 · Materials
Designation
EN material
Standard
Temp. range
[°C]
Cast iron
EN-GJL-250
EN-JL1040 DIN EN 1561 –10 ... +300
A 126 B
–
ASTM
FC 250
–
JIS
–29 … +232
Spheroidal graphite iron
EN-GJS400-18U-LT
EN-JS1049 DIN EN 1563 –10 ... +350
Cast steel (carbon steel)
GP240GH
1.0619
G20Mn5
1.6220
DIN EN
10213-3
–10 ... +400 1)
–40 ... +300
G17CrMo5-5
1.7357
DIN EN
10213-2
G12CrMo9-10
1.7380
SEW 595
–10 ... +500 2)
A 216 WCC
–
ASTM
–29 ... +427
A 352 LCC
–
ASTM
–46 ... +343
A 217 WC6
–
ASTM
–29 ... 500 2)
A 217 WC9
–
ASTM
–29 ... +500 2)
Consistent with ASTM
–
JIS
–29 ... +427
–10 ...
+500 2)
Ordering text
The following details are required on ordering:
Type of valve
Nominal size DN
Nominal pressure PN
Body material
Type of end
connections
Plug *)
Characteristic
*)
...
*)
...
*)
...
*)
...
Flanges/welding ends/
welding-neck ends
Standard, pressure-balanced,
With metal sealing, soft sealing
or lapped-in metal
Hard facing
Equal percentage or linear
Cast stainless steel
GX5CrNi19-10
1.4308
GX5CrNiMoNb19-11-2
1.4581
DIN EN
10213-4
–200 … +300
A 351 CF 8
–
ASTM
–200 … +300
A 351 CF 8M
–
ASTM
–200 ... +450 2)
Consistent with ASTM
–
JIS
–200 ... +450
–10 ... +450 2)
Pneumatic Actuator
Fail-safe position
Transit time
Process medium
Flow rate
Forged steel
P250GH
A 105
Pressure
1.0460
DIN EN
10222-2
–10 ... +400 1)
–
ASTM
–29 ... +427
Accessories:
Forged stainless steel
X6CrNiMoTi17-12-2
A 182 F316
1.4571
DIN EN
10222-5
–200 ... +450
−
ASTM
–200 ... +450
1)
Up to –60 °C at pmax ≤ 75 % PN (acc. to AD W10)
2)
Higher application temperatures on request
25
*)
Version acc. to T 8310-1/-2 EN
Valve CLOSED or OPEN
(Specifications only for special
positioning time requirements)
Density in kg/m3
in standard or operating state and
temperature in °C
in kg/h or m3/h
in standard or operating state
p1 in bar (absolute pressure pabs)
p2 in bar (absolute pressure pabs)
at minimum, normal and
maximum flow rate
Positioner and/or limit switch, position
transmitter, solenoid valve, lock-up valve,
volume booster, supply pressure regulator
When no specifications are made, a suggestion is provided by
SAMSON
T 8000-1 EN
Specification sheet for control valves
Specification sheet for control valves according to DIN EN 60534-7 ·
Site of installation
2
Control task
7
Pipeline
8
Pipe material
12
Process medium
13
State at the valve inlet
15
16
17
18
Operating data
1
- Details that must be specified to select and size the valve
DN ...
PN ...
Class ...
¤ - Liquid
¤ - Vapor
¤ - Gas
Min.
Usual
Max.
Unit
Flow rate
Inlet pressure p1
Output pressure p2
Temperature T1
20
Input density ρ 1 or M
21
Vapor pressure Pv
22
Critical pressure Pc
23
Kinematic viscosity v
31
Calculation of max. flow coefficient KV
32
Calculation of min. flow coefficient KV
33
Selected flow coefficient KVS
34
Calculated sound pressure level
35
Type .... Valve
36
Valve body style
38
Nominal pressure
39
Nominal size
DN ...
40
Type of end connections
¤ - Flange
¤ - Welding ends
¤ - Weld-neck ends
¤ - DIN / ¤ - ANSI
Type of bonnet
¤ - Normal
¤ - Insulating section
¤ - Bellows seal
¤ - Heating jacket
¤ - Linear
¤ - Equal percentage
¤ - Solid Stellite
¤ - Hardened
43
45
47
Valve body
19
… dB(A)
PN ...
Body/bonnet material
Characteristic
Plug/plug stem material
49
Bushing/seat material
52
Hard facing
¤ - None
¤ - Partially stellited
54
Leakage class
¤ - % KVS
¤ - Class ...
55
Packing material
¤ - Standard
¤ - Form ...
57
Actuator type
¤ - Pneumatic
60
Effective area
… cm2
62
Supply pressure
Min. ...
Max. ...
Fail-safe action
¤ - Fail Close
¤ - Fail Open
¤ - Fail in Position
Other type of actuator
¤ - Electric
¤ - Electrohydraulic
¤ - Hand-operated
¤ - No
¤ - Yes
63
64
66
Actuator
48
Bench range
Fail-safe position for three-way valve
68
Additional manual override
70
Positioner
71
Input signal
¤ - Pneumatic
¤ - Electric
Control valve OPEN at
… bar
… mA
… mA
72
Positioner
67
… bar
Air connection max.
… bar
78
Explosion protection
¤ - EEx i
¤ - EEx d
80
Type of limit switch
Limit switch
¤ - Electric
¤ - Inductive
¤ - Pneumatic
Switching position
¤ - CLOSED
¤ - … % travel
¤ - OPEN
Switching function
¤ - Closing
¤ - Opening
Explosion protection
Type of solenoid valve
¤ - EEx i
¤ - EEx d
82
83
84
86
87
88
91
Sol. valve
81
Limit switch
Control valve CLOSED at
76
73
Style
¤ - 2-way
¤ - 3-way
If power fails, the valve should be
¤ - OPEN
¤ - CLOSED
¤ - Last position
Electric data
…V
… Hz
…W
SAMSON AG · MESS- UND REGELTECHNIK
Weismüllerstraße 3 · 60314 Frankfurt am Main · Germany
Phone: + 49 69 4009-0 · Fax: +49 69 4009-1507
Internet: http://www.samson.de
T 8000-1 EN