Series 240 · 250 · 280 · Pfeiffer DN 10 … 600 · PN 10

Information Sheets Materials/Flow Coeff. T 8000-2/-3 ENControl Valves T 8012 EN to T 8097 ENSteam-converting Valves T 8250 EN to T 8265 EN

Edition January 2011

Information Sheet T 8000-1 EN

Series 240 · 250 · 280 · PfeifferPneumatic and Electric Control Valves

Information Sheet Part 1

DN 10 … 600 · PN 10 … 400 · –200 … 600 °CNPS ¼ ... 24 · Class 125 … 2500 · –328 ...1100 °FDN 15A … 250A · JIS 10K/20K · –200 … 500 °C

2 T 8000-1 EN

Contents

SAMSON control valvesSeries 240, 250, 280 and valves for special applications 3

Table 1a · Series 240 Control Valves and valvesfor special applications 4

Table 1b · Series 250 Control Valves 5Table 1c · Series 280 Steam-converting Valves 5

Series 240Type 3241 Globe Valve 6Type 3241 in forged steel version 6Type 3241-Gas, Pneumatic Control and Quick-actingShut-off Valve for gases 6Type 3241-Oil, Pneumatic Control and Quick-actingShut-off Valve for liquid fuels and liquified petroleum gasin the liquid phase 6Type 3241 Control Valve with safety function,typetested 7Type 3244 Three-way Valve 7

Valves for special applicationsType 3248 Cryogenic Valve 7Type 3249 Control Valve for aseptic service 7Type 3345 Diaphragm Valve 8Type 3347 Control Valve for food processing 8Type 3351 Pneumatic On-off Valve 8Type 3510 Micro-flow Valve 8

Series 250Type 3251 Globe Valve 9Type 3252 High-pressure Valve 9Type 3253 Three-way Valve 9Type 3254 Globe Valve 9Type 3256 Angle Valve 10Type 3259 Angle Valve 10Lined globe valves

Pfeiffer Type BR 1a with PTFE lining 10Pfeiffer Type BR 1b with PFA lining 10

Series 280Type 3281 and Type 3286 Steam-converting Valves 11Type 3284 Steam-converting Valve 11

Control valve detailsValve bodies and styles

Globe valve 12Three-way valve 12Angle valve 12Cryogenic valve 13Valve for food processing 13Diaphragm valve 13On-off valve 14Micro-flow valve 14Steam-converting valve 14

Valve bonnetsPacking 14Steam line connection 15

Seat and plug trims

Seat leakage rate 16Table 2 · Plug sealing and seat leakage rate 16Pressure balancing 16Control valves with ceramic trims 16Flow dividers 16AC trims and silencer 17

Additional componentsBellows seal 17Insulating section 17Heating jacket 18

Face-to-face dimensionsGlobe and angle valves acc. to DIN and ANSI 18

Types of pipe connections 18

Valve-specific parametersKVS coefficient 19Rangeability 19Inherent characteristic 19

ActuatorsPneumatic actuators 20Electric actuators 20Electrohydraulic actuators 20Hand-operated actuators 20

Accessories for control valvesPositioners 21Limit switches 21Position transmitter/potentiometer 21Solenoid valves 21Lock-up valve 21Pneumatic remote adjuster 21Supply pressure regulators 21Supply pressure regulators with air filter 21Pneumatic volume booster 21

Valve sizingCalculating the KV coefficient 22Selecting the valve 22

Noise predictionxFz factor 23Table 3 · Series 240 and 250 23Gases and vapors 24Liquids 24

Materials conforming to DIN and ANSI/ASMETable 4 · Materials 25

Selection and orderingSelection and sizing of the control valve 25Ordering text 25

Specification sheet for control valves(according to IEC 60534-7) 26

SAMSON control valvesSeries 240, 250 and 280 Control Valves include pneumaticand electric globe valves, three-way valves and angle valves.Their application range covers control tasks in process engi-neering and industrial applications as well as in supply andpower plant engineering. The modular system allows easyretrofitting and servicing.

The control valves consist of the valve and actuator. They can beequipped with pneumatic, electric, electrohydraulic orhand-operated actuators. For controlling purposes and travelindication, accessories such as positioners, limit switches andsolenoid valves can either be attached directly (see page 21and Information Sheet T 8350 EN) or according toIEC 60534-6 (NAMUR rib).

The valve bodies are available in cast iron, spheroidal graphiteiron, cast steel, cast stainless or cold-resisting steel, forged steelor forged stainless steel as well as in special materials. All partsof the valve and the pneumatic actuator housing in the com-pletely corrosion-resistant version are made of stainless steel.Refer to the associated data sheets for details.

Series 240Series 240 Control Valves are available in nominal sizes rang-ing from DN 15 to DN 300 (NPS ½ to 12) and up to a nominalpressure PN 40 (Class 300).Control valves in the standard version are suitable for tempera-ture ranges between –10 and +220 °C (15 and 430 °F). An in-sulating 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-ringpacking or an adjustable packing. To meet stricter emissionscontrol requirements, a stainless steel bellows is used.The Type 3241 Control Valve can be equipped with a heatingjacket that may also include the bellows.

Series 250Series 250 Control Valves are used when large nominal sizesand/or high pressures are involved in process engineering,power plant or supply engineering.In addition to globe, three-way and angle valves, four-flangedvalve bodies with bottom plug stem guides, and valves with ax-ial multi-stage throttling plugs, customized valve constructionsto meet customer specifications can be engineered.The valves are manufactured in nominal sizes from DN 15 toDN 600 (NPS ½ to 24) and for nominal pressures betweenPN 16 and PN 400 (Class 150 to 2500).The standard versions of these control valves are suitable fortemperatures ranges between –10 and +220 °C (15 and430 °F). This temperature range can, however, be extended byusing an adjustable high-temperature packing to a temperaturerange between –10 and +350 °C (15 and 660 °F) and by usinga bellows seal or an insulating section to a temperature rangebetween –200 and +500 °C (–325 and +930 °F).

Series 280Series 280 Steam-converting Valves are used to reduce both thesteam pressure and steam temperature to optimize plant opera-tion and heat efficiency in process plants, for example, in refin-eries, food and beverage, tobacco or pulp and paper indus-tries.

Steam-converting valves are based on Series 250 Valves fittedwith a flow divider St III and an additional spray water connec-tion. They are available in nominal sizes ranging from DN 50 toDN 400 (NPS 2 to 16), with nominal pressures of PN 16 toPN 400 (Class 150 to 2500) and for temperatures up to500 °C (930 °F).

Valves for special applicationsThese valves have been developed for special requirements in-cluding cryogenic valves, valves for food processing, dia-phragm control valves and micro-flow control valves.

3 T 8000-1 EN

4 T 8000-1 EN

Table 1a · Series 240 Control Valves and valves for special applications

Control valve Series 240 For special applications

Type3241

3244 3248 3249 3345 3347 3351 3510DIN ANSI Gas Oil TÜV

Data Sheet T … EN 8015 8012 8020 8022 8016 8026 8093 8048 8031 8097 8039 8091

Globe valve • • • • • • • • •

Three-way valve for mixing or diverting service •

Angle valve • • • •

Standard version

DIN • • • • • • • • • • •

ANSI • • • • • • • • • •

JIS • •

Specialappli-cations

Low flow rates •

Typetested for gas, DIN EN 161 •

Liquid fuels, DIN EN 264 •

Typetested acc. to DIN 32730 •

On-off valves •

Pharmaceutical/food industries • • •

Cryogenics •

Nominal sizes

DN 15…300

15…150

15…100

15…150

15…150

15…150

15…80

15…150

15…125

15…100

10,15, 25

NPS ½...12 ½...6 ½...4 ½...6 ½...6 ½...3 ½...6 ½...5 ½...4 ½...1

Nominal pressure

PN 10...40 40 16, 40 16...40 16...40 16...100 10 10 16 10...40 40...400

Class125, 300 300 300 150, 300

150…600

150 psi 150 psi 240 psi 150, 300150…2500

JIS 10/20KRF

Perm. temperatures and differential pressures Refer to associated data sheet

Bodymaterial

Cast iron, EN-JL1040 • • • • •

Spheroidal graphite iron, EN-JS1049 • • •

Cast steel, 1.0619 • • • • • •

Cast stainless steel, 1.4581 • • • • • • 1.4404 •

Forged steel, 1.0460 • • • •

Forged stainless steel, 1.4571 • • • • • • •

ASTM A 126 B, cast iron • •

ASTM A 216 WCC, cast steel • • •

ASTM A 351 CF8M, cast st. steel • • • 351CF8 • •

GX5CrNi19-10, 1.4308 •

G20Mn5, 1.6220 (formerly1.1138) •

Special materials • • • • • • •

Plug

Metal sealing • • • • • • • • •

Lapped-in metal • • • • •

Soft sealing • • • • • • • •

Pressure-balanced • • •

Diaphragm seal • •

Option

Insulating section • • • • • •

Bellows seal • • • • • • •

Heating jacket • • •

Low-noise (flow divider) • • • •

Endconn-ections

Flanges • • • • • • • • • •

Welding ends • • • • • • • •

Special end connections • • • • • •

Data Sheet T … EN 8015 8012 8020 8022 8016 8026 8093 8048 8031 8097 8039 8091

5 T 8000-1 EN

Table 1b · Series 250 Control Valves (see Volume 2 of control valve catalog)

Type 3251 3252 3253 3254 3256 3259 BR 1a BR 1bData Sheet T … EN 8051 8052 8053 8055 8060 8061 8065 8066 8059 TB 01a TB 01b

Globe valve • • • • • • •

Three-way valve for mixing or diverting service • BR 1d*

Angle valve • • • •

Standard versionDIN • • • • • IG • •

ANSI • • • • • • •

Nominal sizesDN 15...600 15...25 15...400 80...500 15...200 16...90 25...150 25...80

NPS ½...24 ½...1 ½...20 3...20 ½...8 1...6 1...3

Nominal pressure

PN 16...400 40...400 10...160 16...400 16...400 325 10/16 10/16

Class 150…2500

300…2500

300…2500

150…2500

300…2500

150 150

Perm. temperatures and differential pressures Refer to associated data sheet

Bodymaterial

Cast steel, 1.0619 • • • •

G17CrMo5-5, 1.7357 • • •

Cast stainless steel, 1.4408 • 1.4404 • • •

ASTM A 216 WCC • • •

ASTM A 217 WC6 • • •0.7043/

PTFE0.7043/

PFAASTM A 351 CF8M • A316L • •

Special materials • • • • 1.4571

Plug

Metal sealing • • • • • • • • •

Lapped-in metal • • • • • • •

Soft sealing • • • • • • • • •

Pressure-balanced • • • • • •

Ceramic trim • • • •

Option

Insulating section • • • • • • • • •

Bellows seal • • • • • • • • • PTFE PTFE

Heating jacket • • • • • •

Low-noise (flow divider) • • • • • •

End conn-ections

Flange • • • • • • • • • • •

Welding ends • • • • • • • •

Special end connections • • • • • • •

Data Sheet T … EN 8051 8052 8053 8055 8060 8061 8065 8066 8059 TB 01 a TB 01 b

Table 1c · Series 280 Steam-converting Valves (see Volume 2 of control valve catalog)

Type 3281 3284 3286

Nominal sizes DN 50 … 200 100 … 400 50 … 200NPS 2 … 8 4 … 16 2 … 8

Data Sheet T … EN 8251 8254 8251

Technical data (DIN/ANSI) acc. to Type 3251 Type 3254 Type 3256

Series 240Type 3241 Globe Valve (T 8012 EN to T 8022 EN)This valve is used for a wide range of applications in processengineering and industrial plants as well as in supply andpower plant engineering. Standard valves are availableconforming to DIN, ANSI und JIS standards.Valve bodies are manufactured in cast iron, spheroidalgraphite iron, cast steel, cast stainless or cold-resisting steel.

Nominal size DN 15 … 300 NPS ½ … 12

Nominal pressure PN 10 … 40 ANSI Class 125 … 300JIS 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, bellowsseal, insulating section, heating jacket or flow divider to reducenoise emissions.

Type 3241 in forged steel version (T 8015 EN)Valve body and bonnet made of forged steel 1.0460 (C22.8) orforged 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 theType 3241 Valve in cast version (see above).

Type 3241-Gas, Pneumatic Control and Quick-actingShut-off Valve for gases (T 8020 EN)The safety shut-off valves for gas typetested according toDIN 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. Theplug stem is sealed by a corrosion-resistant steel bellows fittedwith a test connection and a backup self-adjusting packing.The valve bodies are available in cast steel, cast stainless steel,and forged steel.


Nominal pressure PN 40 ANSI Class 300

Medium temperatureAmbient 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-offValve for liquid fuels and liquefied petroleum gas in theliquid phase (T 8022 EN)Control valve typetested acc. to DIN EN 264 as a control andsafety 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 steel1.4571 or forged steel 1.0460.


Nominal pressure PN 16 and PN 40 ANSI Class 300

Max. medium temp.Ambient temperature

350 °C–15 … +60 °C

662 °F5 … 140 °F

Valve plug with soft sealing or lapped-in metal.Further versions available with bellows seal.

6 T 8000-1 EN

Type 3241-1Pneumatic Control Valve

Type 3241-7 withforged steel valve body

Type 3241-Gas with bellows seal and Type 3241-Oil,both with positioner, solenoid valve and strainer

Type 3241 Pneumatic Control Valve with safety function,typetested (T 8016 EN)The control valve typetested according to DIN 32730 can as-sume the function of a control valve as well as that of a safetytemperature limiter or pressure limiter. The standard version issuitable for water and steam up to 220 °C, the version with insu-lating 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 stainlesssteel.

Nominal size DN 15 … 150

Nominal pressure PN 16 … 40

Perm. temperature –200 … +350 °C

Valve plug with metal sealing.

Type 3244 Three-way Valve (T 8026 EN)Control valve for mixing and flow-diverting service according toDIN or ANSI standards.Mixing or diverting service is determined by the arrangement ofthe valve plug at the factory (see valve body on p. 12).Valve bodies available in cast iron, cast steel and cast stainlesssteel (according to DIN or ASTM specifications).


Nominal pressure PN 10 … 40 ANSI Class 150 … 300

Temperature range –200 … +450 °C –325 … 800 °F


Further versions are available with adjustable packing, bellowsseal, insulating section, heating jacket, or additionalhandwheel.

Valves for special applicationsType 3248 Cryogenic Valve (T 8093 EN)Control valve used for liquid gases in the field of cryogenic engi-neering. Installation in cold box or in vacuum-insulated pipe-lines.

Nominal size DN 15 … 150 * NPS ½ … 6

Nominal pressure PN 16 … 100 ANSI Class 150 … 600


* DN 200/NPS 8 and DN 250/NPS 10 on request


Bellows seal with backup packing.

Special version with aluminum valve body.

Type 3249 Control Valve for aseptic service (T 8048 EN)Angle valve for food processing and pharmaceutical industriesaccording to DIN or ANSI standards. PTFE-coated EPDM dia-phragm serves as external sealing; additional test connectionand backup packing.


Maximum pressure 10 bar 150 psi

Temperature range –10 … +130 °C 14 … 266 °F

Versions are available with threaded ends, conical couplingand flanges as well as flanges or clamp connections conformingto ANSI requirements.

7 T 8000-1 EN

Type 3244-7Three-way Valve

Type 3249Angle valve foraseptic service

Type 3241-1typetested

Type 3248-1 Cryogenic Valve inglobe-pattern and aluminum angle-pattern

Type 3345 Diaphragm Valve (T 8031 EN)Control valve for viscous, corrosive and abrasive fluids accord-ing to DIN or ANSI standards.

Valve bodies available in cast iron, spheroidal graphite ironand cast stainless steel with or without lining.Valve diaphragm made of butyl, FPM (FKM) or ethylenepropylene (also with PTFE protective facing).


Nominal pressure 10 bar 150 psi


Versions for higher temperatures or with FDA approval for thefood processing industry available on request.

Type 3347 Control Valve for food processing (T 8097 EN)Angle valve for food processing and pharmaceutical industriesas well as for in the field of biochemistry equipped with weld-on,screw or clamp connections.

Suitable for CIP cleaning.


Maximum pressure 16 bar 240 psi


Version available in bar stock body with threaded end connec-tions complying with 3A und EHEDG regulations.

Type 3351 Pneumatic On-off Valve (T 8039 EN)Valve for on/off service with tight shutoff for liquids, non-flam-mable gases and steam.

Valve bodies available in cast iron, cast steel and cast stainlesssteel.


Nominal pressure PN 10 … 40 ANSI Class 150...300

Medium temperatureAmbient temperature

–50 … +250 °C–10 … 90 °C

–20 … 482 °F14 … 194 °F

Valve plug with both metal sealing and soft sealingsimultaneously.

Self-adjusting PTFE V-ring packing.

Further versions are available with insulating section, bellowsseal or additional handwheel.

Type 3510 Micro-flow Valve (T 8091 EN)Control valve with either stainless steel globe- or angle-patternbody designed to control very low flow rates in pilot plants andtechnical research facilities.

Nominal size DN 10, 15, 25 NPS ½ to 1

Nominal pressure PN 40 … 400 ANSI Class 150…2500


Further versions are available with insulating section or bellowsseal.

8 T 8000-1 EN

Type 3345-1Diaphragm Valve

Type 3347-7 Valvefor food processing

Type 3351-1On-off Valve

Type 3510-7Micro-flow Valve

Series 250Type 3251 Globe Valve (T 8051 EN, T 8052 EN)Control valve for applications in process engineering andindustrial plants as well as in supply and power plantengineering. Suitable for large nominal sizes and/or highpressures according to DIN and ANSI standards.

Valve bodies available in high-temperature, cold-resisting andcast stainless steel.




Valve plug with metal sealing, soft sealing or lapped-in metal.

Further versions are available with bellows seal, insulating sec-tion, heating jacket, flow divider to reduce noise emissions, orpressure-balanced plug.

Type 3252 High-pressure Valve (T 8053 EN)Control valve with either globe- or angle-pattern body to controllow flow rates in process engineering applications.

Valve bodies available in cast stainless steel.





Further versions are available with bellows seal or insulatingsection. End connections with female thread, welding ends orflanges. Other valve body materials available on request.

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 and cast stainless steel.





Further versions are available with bellows seal or insulatingsection.

Type 3254 Globe Valve (T 8060 EN, T 8061 EN)Control valve for process engineering applications according toDIN or ANSI standards.

Valve bodies available in cast iron, high-temperature,cold-resisting and cast stainless steel.

Nominal size DN 80 … 500 NPS 3 … 20



Valve plug with metal sealing, soft sealing or lapped-in metal.The valve has an additional plug stem guide in the bottom bodyflange.


9 T 8000-1 EN

Type 3251Globe Valve

Type 3253Three-way Valve

Type 3252High-pressure Valve

Type 3254Globe Valve

Type 3256 Angle Valve (T 8065 EN, T 8066 EN)Control valve for process engineering applications according toDIN or ANSI standards.

Valve bodies available in high-temperature, cold-resisting caststeel and cast stainless steel.




Valve plug with metal sealing, soft sealing or lapped-in metal.


Type 3259 Angle Valve (T 8059 EN)Control valve for industrial plants with high pressure require-ments according to the IG standard

Nominal size DN 16 … 90 *

Nominal pressure PN 325


* Nominal size DN 120 on request

The valve body is made of forged stainless steel and the endconnections are designed as screwed-on flanges with lens ringgaskets.

Valve plug with metal sealing or lapped-in metal.

Lined valvesValves suitable for corrosive media, in particular, to meet highrequirements in chemical plants. Streamlined valve body madeof spheroidal graphite iron EN-JS1049. Exchangeable PTFEvalve seat and PTFE plug, plug stem sealed by a special PTFEbellows and an additional packing with test connection.

Pfeiffer Type BR 1a (TB 01a EN)Globe valve with 5 to 8 mm isostatic PTFE lining


Nominal pressure PN 10 … 16 ANSI Class 150

Temperature range Up to 200 °C Up to 390 °F

Pfeiffer Type BR 1b (TB 01b EN)Globe valve with 4 to 5 mm thick PFA lining


Nominal pressure PN 10 … 16 ANSI Class 150


Other linings and materials available on request.

10 T 8000-1 EN

Type 3256Angle Valve

Type 3259 Angle Valveacc. to IG standard

Pfeiffer Type BR 1bPFA-lined Globe Valve

Pfeiffer Type BR 1aPTFE-lined Globe Valve

Series 280Control valves for process engineering or for heat efficiency toreduce 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) accordingto DIN or ANSI standards.




Type 3284 Steam-converting Valve (T 8254 EN)Globe valve with four-flanged body and double-guided plugstem according to DIN or ANSI standards.




11 T 8000-1 EN

Type 3281Steam-converting Valve


Control valve details

Valve bodies and stylesThe valve body, valve bonnet and, in some cases, the bottomflange are subject to internal stress caused by the process me-dium flowing through the valve. Consequently, the valves mustbe designed to be sufficiently resistant to mechanical and chem-ical stress.Under the influence of the operating temperature, the materialstrength changes. This behavior can be improved by combiningcertain alloys. For this reason, heat-resisting materials are usedat high temperatures (e.g. according to DIN EN 10213) andcold-resisting materials are used for cryogenic service. The ma-terials table on page 25 and the AD Specification Sheet W 10provide a summary.

Globe valve (T 8015 EN, T 8060 EN)Globe valves allow easy installation in straight pipelines. Fornominal pressures up to PN 40 and nominal sizes up toDN 300, three-flanged bodies of the Series 240 are mainlyused. The plug stem is guided in the valve bonnet, and theV-port plug in the bolted-in seat.The ports of the V-port plug are asymmetric in order to suppressany oscillations.

To handle higher load levels and when larger seat diametersare used, the Type 3254 Globe Valve of the Series 250 is pro-vided with an additional plug stem guide in the bottom flange.

Three-way valve (T 8026 EN)Three-way valves are used for mixing or flow-diverting service.

The mode of operation depends on how the two plugs are ar-ranged. The direction of flow is indicated by arrows.

Angle valve (T 8065 EN)Angle valves are ideally installed when a vertical pipeline and ahorizontal pipeline need to be connected. The process mediumis only diverted once. Angle valves allow the condensate to beoptimally 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 ananti-wear sleeve.For process media containing solids, the outlet of the Type 3256Control Valves can additionally be fitted with a ceramicwear-resistant pipe.

12 T 8000-1 EN

Type 3241 Globe Valve

Additional plug stem guide in Type 3254

Mixing service with Type 3244 Three-way Valve

Flow-diverting service with Type 3244 Three-way Valve

Type 3256 Angle Valve

Cryogenic valve (T 8093 EN)Plants that produce liquefied, cryogenic air separation gases,often use vacuum-insulated pipelines to prevent environmentalheat being transferred to the medium. The control valves can beintegrated in the vacuum jacket using a connecting flange. Thevalve is designed to widely prevent thermal conduction to the ef-fect that the stem remains free of ice. A bellows seal serves asthe primary sealing.The jacketed pipeline is evacuated of air and sealed off after in-stallation of the components. The cryogenic extension bonnet ofthe control valve is often welded to the jacketed pipeline over aflange, meaning considerable work would be involved toremove the valve from the pipeline. However, to make mainte-nance possible, the internal parts can be accessed via the cryo-genic extension bonnet without having to remove the valve fromthe pipeline.

Valve for food processing (T 8048 EN, T 8097 EN)Valves for food processing are angle valves made of stainlesssteel. The internal surfaces exposed to the process medium aremachined to a fine finish or polished. The valve bodies areself-draining and can be cleaned (CIP) or sterilized (SIP) withouthaving to be disassembled. The stem of Type 3249 is sealed bya special diaphragm, preventing bacteria from being trapped.

The Type 3347 Control Valve is available with welding ends, athreaded or a clamp connection according to ISO 2852, andwith a steam line connection if higher purity requirements are tobe met.

Diaphragm valve (T 8031 EN)For viscous or corrosive media possibly containing solids, dia-phragm control valves that are free of dead space and withoutstuffing boxes are an economical solution. The diaphragm maybe made of rubber, nitrile, butyl or PTFE. The valve body mayadditionally be lined with rubber or PTFE.

13 T 8000-1 EN

Type 3248 Cryogenic Valve

Type 3249 Valve for food processing

Type 3347 with steam line connection

Type 3345 Diaphragm Valve

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 equippedwith both a metal sealing and a soft sealing, the leakage flowrate class VI is achieved.

Micro-flow valve (T 8091 EN)Micro-flow valves are used for very low flow rates (KV coeffi-cients <1.6 to 10–5 m3/h).The parts exposed to the process medium are made of stainlesssteel 1.4571. All valve parts are made of semi-finished prod-ucts. As a result, special materials can be used in a particularlycost-effective manner, and the valve covers a wide range of ap-plications.

Steam-converting valve (T 8251 EN, T 8254 EN)Steam-converting valves are used to reduce the steam pressureand the steam temperature simultaneously. A connecting pipesupplies the spray water to the flow divider St III. At its innerwall, the spray water comes into contact with the steam flow.The steam flow and the entrained water are mixed in the narrowwire mesh of the flow divider. As the supplied spray water doesnot come into contact with the valve body, neither erosion northermal shock occur. The flow divider ensures low-noise andlow-vibration operation.

Valve bonnetsThe valve bonnet seals the valve at the top and provides roomfor the stuffing box and the plug stem guide. The valve bonnetand the yoke of Series 240 Valves are incorporated in onepiece. The valve bonnet and the yoke of Series 250 and 280Valves are bolted together. The NAMUR rib standardized inIEC 60534-6 located on the yoke allows easy, standardized at-tachment of a positioner or other accessories. The valve bonnetis a pressure-bearing part that is exposed to the process me-dium, therefore its material is subject to the same design re-quirements as the valve body.

PackingThe plug stem is sealed by the packing. Versions with bellowsseal or insulating section or when the packing functions as abackup packing use the standard packing.The temperature range of the standard packing is between –10and 220 °C and can be extended when an insulating section isfitted on the valve bonnet.

Other packings can be installed for special applications.

Packing formsStandard packing


Self-adjusting, spring-loaded V-ring packing made ofPTFE-carbon for nominal sizes DN 15 to DN 150.Self-adjusting PTFE-carbon/PTFE-silk packing for nominalsizes DN 200 to DN 500.Suitable for all applications that require a high level of seal-ing performance, yet requiring hardly any maintenance.

14 T 8000-1 EN

Type 3351 On-off valve

Type 3510 Micro-flow Valve


Valve bonnet of Series 240 Valves

Valve bonnet for Series 250 Valves

Form AAdjustable, cavity-free PTFE-silk/PTFE-carbon packing.Especially suitable for process media that crystallize out orpolymerize.

Form BAdjustable, 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 polymerizeand in case carbon particles would contaminate the processmedium.

Form CAdjustable, cavity-free packing made of woven PTFE-silk.Application for all chemicals including hot acids and alka-line solutions.

Form DSpring-loaded V-ring packing made of pure PTFE.Suitable for pure process media in case carbon particleswould contaminate the process medium.

Form HAdjustable high-temperature packing made of graphite andcarbon rings.Especially suitable for superheated steam.

Form SSpring-loaded V-ring packing made of PTFE-carbon withBAM approval (German Institute for Materials Researchand Testing).Suitable for oxygen service (only when BAM-approved lu-bricant is used).

Form WAdjustable, cavity-free packing made of PTFE-graphitethread and carbon for fresh and service water. The carbonbushings serve as wipers.Especially suitable for hard water and any process mediathat may cause deposits forming on the plug stem.

NACE standardSpring-loaded V-ring packing made of PTFE-carbon con-forming to NACE standard.Suitable for sour gas/sour water.

ADSEALSpring-loaded V-ring packing made of PTFE-carbon withADSEAL emergency adjusting function.

Packing versions for extended application conditions availableon request.

Steam line connectionThe Type 3347 Control Valve can be provided with a valvebonnet including a steam line connection to meet therequirements regarding purity in the food processing andpharmaceutical industries. Steam or a sterilizing liquid flushesthe plug stem between the two PTFE V-ring packings to preventbacteria from being trapped.

Seat and plug trimsThe design of the seat and the plug determines the KVS coeffi-cient and the characteristic as well as the seat leakage rate of avalve. The drawings show seat-guided V-port plugs with asym-metric ports with metal sealing and soft sealing.

The seat, plug and plug stem are made of stainless steel. In somecases, the trim elements are subject to high stress due to high dif-ferential pressures, cavitation, flashing, or in cases where theprocess media contains solids. In order to increase the servicelife, seats and plugs with metal sealing can be provided with aStellite hard facing, and plugs up to DN 100 can be made ofsolid Stellite.The seats are bolted into place, allowing them to be easily ex-changed. They may also be made of other materials.

15 T 8000-1 EN

Steam line connection in Type 3347

Metal sealing Soft sealing

Seat leakage rateThe seat leakage rate is determined according to IEC 60534-4which specifies the maximum amount of the test processmedium (gas or water) that may flow through the closed controlvalve under test conditions.For special applications (e.g. using Type 3241-Gas orType 3241-Oil) or with shut-off valves (Type 3351), a highleakage rate class can be achieved by using a lapped-in metalor a soft sealing.

Table 2 · Plug sealing and seat leakage rate

Seat/plug sealingLeakage rate class acc.

to IEC 60534-4Seat leakage

% of KVS

Metal sealing IV � 0.01

Lapped-in metalup to DN 80

IV-S2 � 0.0001

Lapped-in metalin DN 100 or larger

IV-S1 � 0.0005

Soft sealing VI 0.3 · �p · fL 1)

PTFE ring withpressure balancing

IV � 0.01

Graphite ring withpressure balancing

III � 0.1

1) Leakage factor fL according to IEC 60534-4

Pressure balancingIf the actuator force is not sufficient to handle the differentialpressure, pressure-balanced plugs are a good solution. Theplug is designed to function as a piston. The upstream pressurep1 is transferred to the back of the plug via a borehole in the bot-tom of the plug. The forces acting on the plug are compensatedfor with exception of the area around the plug stem.Pressure-balanced plugs are additionally sealed with a PTFEring or a graphite ring. The pressure-balanced components aresubject to wear. As a result, the seat leakage rate (see Table 2)and the amount of maintenance needed for these valvesincrease. Pressure-balanced plugs should not be used, if at allpossible, for high-temperature process media or for media thatcontain solids or crystallize out. In these cases, we recommendto use a more powerful actuator.

Control valves with ceramic trims (T 8071 EN)Control valves with extremely resistant ceramic trims are usedwhen the valve body and the trim are subject to considerableerosion 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 ceramicwear-resistant pipe. When the process medium flows in theflow-to-close (FTC) direction, this version is suitable for extremeerosive and abrasive conditions caused by process mediumcontaining solids.

Details on ceramic materials and their properties are availableon request.

Low-noise operationFlow dividers (T 8081 EN)The flow dividers St I and St III serve to reduce the noise emissionof gases and vapors. The process medium reaches its maximumvelocity after passing the restriction between seat and plug. Be-fore it starts to create a noise-intensive, turbulent mixing zone,the process medium hits the inner wall of the flow divider. Theflow is divided and a low-noise impulse exchange with the sur-rounding medium takes place.

The valve-specific correction values for gases and vapors arerequired for noise calculation according to VDMA 24422, Edi-tion 1989 and IEC 60534 when flow dividers are used. Refer tothe diagrams on page 24 for details.For further details regarding noise calculation, refer to theIEC 60534 standard or contact us and we will perform thesecalculations for you.The KVS coefficient of the valve trim is reduced on using a flowdivider.The associated data sheets include the KVS I for the flow dividerSt I and KVS III for the flow divider St III.

16 T 8000-1 EN

Plug with pressure balancing

Type 3256 Angle Valve with ceramic trim and wear-resistant pipe

Flow divider St I and St III

AC trims (T 8082 EN, T 8083 EN)AC-1 and AC-2 Trims are optimized trims for low-noisepressure letdown of liquids at differential pressures up to40 bar. The seat is raised and the parabolic plug is additionallyguided in the seat.The AC-2 Trim additionally has up to four attenuation plates.

The three-staged AC-3 Trim is used for differential pressures upto 100 bar. Optionally, stellited hard facings or hardened trimsare available.

SilencerThe silencer acts as a fixed restriction that can be installeddownstream of the valve with one to five attenuation plates forapplications with gases or vapors. The silencer increases thebackpressure downstream of the valve which leads to a reduc-tion in the valve outlet velocity and sound pressure level.

Sandwich version for mounting between flanges when oneattenuation plate is used · Body accommodating 2 to 5attenuation plates that can be flanged onto a valve · Extendednominal size of the outlet

Additional componentsBellows sealIn case, stricter emissions control requirements must be met, e.g.TA-Luft or in vacuum applications, a metal bellows is used toseal the plug stem. The plug stem is additionally sealed with apacking at the top flange. This packing serves as a backuppacking.The metal bellows can be monitored for leakage or a sealingmedium can be applied by means of a test connection.The bellows seal can be used for valves ofSeries 240 from –200 to +400 °C, andSeries 250/280 from –200 to +450 °C.

Insulating sectionThe application range of a standard packing can be extendedto an operating temperature of less than –10 °C or over+220 °C by using an insulating section.

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 bythe materials used as specified in the pressure-temperature dia-gram (see Information Sheet T 8000-2 EN).

17 T 8000-1 EN

AC-1 Trim AC-2 Trim

Type 3251 with AC-3 Trim

Type 3381 Silencer attached to Type 3241 Valve

Metal bellows seal

Insulating section

Heating jacketSome process media only flow easily above a certain tempera-ture. Below this temperature they start to solidify or crystallizeout. The valve bodies are fitted with a heating jacket to ensurethat the process medium remains at a certain temperature andcan flow freely. The valve bonnet may also be equipped with aheating jacket when the plug stem is sealed by a bellows seal.

A heat transfer medium flowing between valve body and heat-ing jacket ensures that the process medium is kept at a certaintemperature. If steam is used as heating transfer medium,proper condensate discharge must be ensured. Versions withconnecting flange heating or enlargened connecting flanges forthe body are available on request.

Face-to-face dimensionsSAMSON control valves with flanges have the sameface-to-face dimensions as valves with welding ends.

The face-to-face dimensions are defined according to DIN ENas follows:

PNTypes 3241, 3251, 3254, 3281 and 3284Globe Valves

10… 40 DIN EN 558-1, Series 1

63...100 DIN EN 558-1, Series 2

160 DIN 3202 Part 1 (edition 09.84), Series F2



400 Consistent with ASME B16.10 Class 2500, column 4

Type 3256 and Type 3286 Angle Valves

10… 40 DIN EN 558-1, Series 8

63...100 DIN EN 558-1, Series 9


250 0.5 x values from DIN 3202 Part 1(edition 09.84), Series F3320

400Consistent with ASME B16.10, Class 2500, column 4

(halved values)

ANSI valves with flanges or welding ends

ClassTypes 3241, 3251, 3254, 3281 and 3284Globe Valves

125/150 DIN EN 558-2, Series 37 (Class 150: ISA 75.08.01)

250/300 DIN EN 558-2, Series 38 (ISA 75.08.01)

ClassTypes 3241, 3251, 3254, 3281 and 3284Globe Valves

600 DIN EN 558-2, Series 39 (ISA 75.08.01)

900 ASME B16.10, Class 900, column 5


2500 ASME B16.10. 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




Versions with welding-neck ends are not standardized. ConsultSAMSON first concerning their face-to-face dimensions.

Types of pipe connectionsFlanged connections are most frequently used in industrialplants as they allow easy mounting and removal of valves andtheir milled facings provide excellent sealing reliability andquality.

A summary of DIN flanges, their connection dimensions andtypes of flange faces for valves up to PN 100 is provided inDIN EN 1092-1 and 1092-2, for valves with PN 160 or higherin DIN 2500, DIN 2501, and DIN 2526.The standard version of SAMSON valves has flanges withraised faces in Form B1. Other flange forms are available on re-quest.

The US standard for flanges is ANSI/ASME B16.1 forClass 125 and ANSI/ASME B16.5 for higher pressure ratings.The standard version of cast iron valves with a pressure rating ofClass 125 has flanges with flat faces.Valves with a pressure rating of Class 300 have flanges withraised faces (0.06” height), and valves with higher pressure rat-ings have flanges with raised faces (0.25” height). Other ver-sions are possible. More details available on request.

For critical process media and/or high pressure ratings, thevalve bodies can be supplied with welding ends orwelding-neck ends.

18 T 8000-1 EN

Type 3241 with heating jacket and with bellows heating

Form C (Tongue) Form E (Male Face)

Form D (Groove) Form F (Female Face)

DIN flanges in Form B1 (Raised Face)

For control valves according to DIN standards, the welding endsconform to EN 12627.For control valves according to US standards, the welding endsare specified in ASME/ANSI B16.25.

For installation methods according to US standards, valves ofthe Series 240 are available with NPT female thread in sizes ½”to 2”.

Valve-specific parametersKVS coefficientThe necessary KV coefficient is calculated according toIEC 60534 from the specified operating data.

The KVS coefficient is specified in the data sheets to identify thevalves. It corresponds to the KV coefficient at the rated travelH100. In order to increase control accuracy and with regard tomanufacturing tolerances, the selected KVS coefficient must behigher than the KV coefficient.

RangeabilityThe rangeability is the quotient of KVS/KVR. KVR being thesmallest KV where the characteristic still lies within thepermissible gradient tolerance of the characteristic (IEC 60534Part 2-4).

Inherent characteristicThe characteristic shows the relationship between the KV flowcoefficient 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 equalincrements of travel that yield equal percentage increments ofthe KV flow coefficient.Whereas, in a linear characteristic, equal increments of travelyield equal increments of the KV flow coefficient.

19 T 8000-1 EN

Valve characteristic: 1- linear, 2 - equal percentage

ActuatorsActuators convert the control signal issued, for example, by apositioner into a travel motion carried out by the control valve(plug stem with valve plug).

We supply pneumatic, electric and electrohydraulic actuatorsas well as hand-operated actuators (see Information SheetT 8300 EN).

Pneumatic actuatorsThese are used for pneumatic or electropneumatic controlequipment. Pneumatic actuators are diaphragm actuators witha rolling diaphragm and internally fitted springs. The benefits ofpneumatic actuators include their low overall height, strong po-sitioning force and fast response.

Different signal pressure ranges are available. Pneumatic actu-ators are suitable for use in hazardous areas as well as featur-ing a fail-safe action: Upon air supply failure, the control valveis either closed or opened.

The Type 3277 Pneumatic Actuators allow direct attachment ofpositioners or limit switches. This prevent the travel linkage frombeing misaligned as it is located within the yoke below the actu-ator housing.

Pneumatic actuators can additionally be equipped with ahandwheel (see T 8310-1 EN and T 8310-2 EN).

Electric actuatorsIf compressed air is not available, electric actuators with strongpositioning forces and large travels may be used. These actua-tors are self-locking.Electric actuators are connected to three-point stepping control-lers, electric positioners issuing analog signals or over a revers-ing contactor unit (see T 8330 EN).

Electrohydraulic actuatorsThese actuators are connected to an analog signal viathree-point stepping controllers or electric positioners. Versionswith fail-safe action are available (see T 8340 EN).

Hand-operated actuatorsThey are attached to Series 240 and 250 Control Valves whichare used as hand-operated control valves with rated travels of15 or 30 mm (see T 8312 EN). Hand-operated actuators withlarger travels are available on request (Type 3273-5/-6).

20 T 8000-1 EN

Type 3277 Pneumatic Actuator

Type 3271 Pneumatic Actuatorwith additional handwheel

Type 3275Pneumatic Piston Actuator

Type SAM Electric Actuatorwith manual override

Type 3274Electrohydraulic Actuator

Type 3273 Hand-operated Actuator

Type 3374 Electric Actuator

Accessories for control valvesSAMSON control valves can be equipped with several addi-tional accessories. These accessories are, for example, used foractuator control and travel indication. They are attached eitheraccording to IEC 60534-6 (NAMUR rib) or directly in conjunc-tion with the Type 3277 Pneumatic Actuator (see T 8310-1 EN).For direct attachment, the entire travel linkage is located in aclosed housing in order to prevent contamination, misalignmentas well as personal injury (see Information Sheet T 8350 EN fordetails).

PositionersPositioners (p/p or i/p) compare the signal of pneumatic orelectric control equipment to the travel (manipulated variable) ofthe control valve. They issue a pneumatic signal pressure as theoutput variable. The positioners can be used in standard opera-tion or in split-range operation (see T 8351 EN ff.).

Positioners from the Series 3730 include an integrated firmwarefor valve diagnostics which issue alerts for predictive mainte-nance action (EXPERT and EXPERT+, see T 8388 EN).Smart versions (HART, PROFIBUS-PA, FOUNDATION™Fieldbus) are configured and operated using a PC or handheldterminal (see T 8380/8382/8383/8384 EN).

SAMSON’s own TROVIS-VIEW software serves as a standardoperator interface to operate these smart positioners (seeT 6661 EN).

Limit switchesWhenever 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 arealso available (see Information Sheet T 8350 EN).

Position transmitter/potentiometerTo indicate the travel position of a control valve, the rated travelrange is represented by an analog electric signal (seeT 8363 EN).

Solenoid valvesThe binary signals from control equipment are converted intobinary pneumatic control signals. As a result, the control valvecan quickly be brought into its final position. The solenoid valvesare used for on-off valves or for control valves with fail-safe po-sition (e.g. Type 3241 typetested, T 8016 EN; T 3701 EN).

Lock-up valveIf the supply air pressure falls below an adjusted value, the sig-nal pressure line is shut off. When this happens, the actuatorstops in its last position (see T 8391 EN).

Pneumatic remote adjusterManually adjustable precision regulator for the set point adjust-ment of pneumatic control equipment.

Supply pressure regulatorsSupply pressure regulators provide pneumatic control valveswith a constant air pressure (adjustable between 0 and 6 bar)(see T 8546 EN).

Supply pressure regulator with air filterThey consist of a supply pressure regulator and an air filterholding back foreign particles, oil and/or condensate (seeT 8546 EN).

Pneumatic volume boosterThe actuating time can be made shorter for fast control loops byusing pneumatic volume boosters.

21 T 8000-1 EN

Type 3730-2Positioner

Limit switch,position transmitter or

potentiometer

Solenoid valve

Lock-up valve

Pneumaticremote adjuster

Supply pressure regulator without and with air filter

Valve sizingCalculating the KV coefficientThe KV coefficient is calculated according to IEC 60534. Thedata sheets contain the necessary device-specific specifications.

A preliminary, simplified calculation may be made with the helpof the working equations listed below. They do not take into ac-count the influence of the connecting fittings or choked flow atcritical flow velocities.

Selecting the valveAfter calculating the KV coefficient, the corresponding KVScoefficient of the valve type in question is selected from the datasheet.

In case, real operating data are used in the calculation, thefollowing generally applies: Kvmax � 0.7 to 0.8 · KVS.

22 T 8000-1 EN

Medium Liquids Gases Steam

Pressure drops m3/h kg/h m3/h kg/h kg/h

p2 >p1

2

KV = Q�

�1000 pKV =

W

p1000 � �

KV =QG

519

�

�

G Tp p

1

2KV =

W519

Tp pG

1

2� �KV =

W3162.

vp2

��p <

p1

2

p2 <p1

2KV =

Qp

G

2595 1.�G T1 KV =

Wp2595 1.

TG

1

�KV =

W3162.

2

1

vp

*

�p >p1

2

Including:

p1 [bar] Absolute pressure pabs

p2 [bar] Absolute pressure pabs

�p [bar] Absolute pressure pabs

T1 [K] 273 + t1QG [m3/h] Flow rate of gas,

based on 0 °C and 1013 mbar

� [kg/m3] Density of liquids

�G [kg/m3] Density of gases at 0 °C and 1013 mbar

v1 [m3/kg] Specific volume (v´ from steam table) for p1 and t1v2 [m3/kg] Specific volume (v´ from steam table) for p2 and t1

v* [m3/kg] Specific volume (v´ from steam table) forp1

2and t1

p1 Pressure upstream of the valvep2 Pressure downstream of the valveH TravelQ Flow rate in m3/hW Flow rate in kg/h� Density in kg/m3

(generally also with liquids)�1 Upstream density in kg/m3

(with gases and vapors)t1 Temperature in °C upstream of

the valve

Noise predictionxFz factorThe valve-specific xFz factor is measured on the valve test benchand provides the basis for noise prediction.

When the load of the valve is y = 0.75, this factor indicates thepressure ratio at which cavitation begins.

23 T 8000-1 EN

Table 3a · Series 240

KVS0.1 · 0.16

0.250.4 0.63 1.0 1.6 2.5 4.0 6.3 10 16 25 35 60 63 80 100 160 200 250 260 360 630 1000 1500

Seat Ømm

3 6 12 24 31 38 48 63 80 100 110 125 130 150 200 250 300

Travelmm

15 30 15 30 60 30 60 120

DN xFz · Acoustically determined valve factor

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 0.25

100 0.25 0.25 0.2

125 0.25 0.2 0.2

150 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

KVS0.1 · 0.160.25 · 0.4

0.63 1.0 1.6 2.5 4.0 6.3 10 16 25 40 63 100 160 250 360 630 1000 1500 2000 2500

Seat Ømm

6 12 24 31 38 50 63 80 100 125 150 200 250 300 350 400

Travelmm

15 30 60 120

DN xFz · Acoustically determined valve factor

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

50 0.6 0.55 0.5 0.45 0.5 0.4 0.35

80 0.55 0.5 0.45 0.55 0.45 0.35 0.25 0.25

100 0.55 0.45 0.35 0.3 0.25 0.25

150 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

300 0.25 0.2 0.2 0.2 0.2 0.2

400 0.2 0.2 0.2 0.2 0.2 0.2

Gases and vaporsThe noise emission of single-stage and multi-stage controlvalves for gases is determined according to IEC 60534, Part8-3. This calculation method, however, does not apply to con-trol valves with noise-reducing equipment such as flow dividersSt I and St III. In this case, the calculation must be carried out ac-cording to VDMA 24422, Edition 89.

The calculation is based upon the jet power reached on expan-sion. The noise emission is determined by means of an acousti-cal conversion coefficient � G. Diagram 1 illustrates the differ-ence between the conversion coefficients depending on the dif-ferential pressure ratio. This clearly shows the level difference ofthe internal sound powers and the sound pressure levels to beexpected at one meter distance from the pipeline.

For a differential pressure ratio of, for example, x = 0.5, the dif-ference in sound pressure levels between a valve with and with-out flow divider is –20 dB.

LiquidsThe noise emission on throttling liquids is calculated accordingto IEC 60534, Part 8-4. This calculation is consistent with thecalculation according to VDMA 24422, Edition 89. It is basedon the jet power reached in the valve and also on the valve-spe-cific acoustical conversion coefficient � F empirically deter-mined according to VDMA 24423 for turbulent flows as well asthe valve-specific pressure ratio xFz at the beginning of cavita-tion.

The sound power level and the sound level difference at a dis-tance of 1 m for the valves with different xFz values can be seenin the diagram 2.

For a pressure ratio of xF = 0.5, and a valve with xFz = 0.6, thesound level which is 20 dB less than that of a valve withxFz = 0.3.

24 T 8000-1 EN

1

2

3

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 x

0

-20

-40

-60

-80

-100

[dB]ηG

Diagram 1

Diagram 2

1 - Without flow divider

2 - With flow divider St I

3 - With flow divider St III

xFz

Materials conforming to DIN and ANSI/ASMEThe body materials mainly used and their temperature limits arelisted in the table below.

The application limits of these materials are included in the as-sociated pressure-temperature diagram in the second part ofthis Information Sheet (T 8000-2 EN).

Table 4 · Materials

Designation EN material StandardTemp. range

[°C]

Cast iron

EN-GJL-250 EN-JL1040 DIN EN 1561 –10 … +300

A 126 B – ASTM –29 … +232

FC 250 – JIS

Spheroidal graphite iron

EN-GJS400-18U-LT EN-JS1049 DIN EN 1563 –10 … +350

Cast steel

GP240GH 1.0619 DIN EN10213

–10 … +400 1)

G20Mn5 1.6220 –50 … +300

G17CrMo5-5 1.7357DIN EN10213

–10 … +500 2)

G17CrMo9-10 1.7379DIN EN10213

–10 … +600

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 … +593 2)

Consistent with ASTM – JIS –29 … +427

Cast stainless steel

GX5CrNi19-10 1.4308 DIN EN10213

–200 … +300

GX5CrNiMo19-11-2 1.4408 –200 … +550

A 351 CF8 – ASTM –254 … +300

A 351 CF8M – ASTM –198 … +550 2)

Consistent with ASTM – JIS –200 … +450

Forged steel

P250GH 1.0460DIN EN10222-2

–10 … +400 1)

A 105 – ASTM –29 … +427

Forged stainless steel

X6CrNiMoTi17-12-2 1.4571DIN EN10222-5

–200 … +550

A 182 F316 � ASTM –198 … +450

1) Up to –60 °C at pmax � 75 % PN (acc. to AD W10)2) Higher application temperatures on request

Selection and orderingSelection and sizing of the control valve1. Calculate the required KV coefficient according to

IEC 60534. You may use, for example, the SAMSONvalve sizing software. This sizing usually is carried out bySAMSON.If real operating data are used for the calculation, thefollowing generally applies: KVmax = 0.7 to 0.8 · KVS.

2. Select the KVS coefficient and the nominal size DNaccording to the table in the corresponding data sheet.

3. Select the appropriate valve characteristic on the basis ofthe behavior of the controlled system.

4. Determine the permissible differential pressure �p andselect an appropriate actuator using the differentialpressure tables included in the associated data sheet.

5. Select the materials to be used with regard to corrosion,erosion, pressure and temperature using the materialstables and the associated pressure-temperature diagram.

6. Select the additional equipment, such as positioners and/or limit switches.

Ordering textThe following details are required on ordering:

Type of valve . . . *)

Nominal size DN . . . *)

Nominal pressure PN . . . *)

Body material . . . *)

Type of end Flanges/welding ends/connections welding-neck ends

Plug *) Standard, pressure-balanced,With metal sealing, soft sealingor lapped-in metal

Hard facing

Characteristic Equal percentage or linear

Pneumatic Actuator Version acc. to T 8310-1/-2 EN

Fail-safe position Valve CLOSED or OPEN

Transit time (Specifications only for specialpositioning time requirements)

Process medium Density in kg/m3

in standard or operating state andtemperature in °C

Flow rate in kg/h or m3/hin standard or operating state

Pressure p1 in bar (absolute pressure pabs)p2 in bar (absolute pressure pabs)

at minimum, normal andmaximum flow rate

Accessories: Positioner and/or limit switch, positiontransmitter, solenoid valve, lock-up valve,volume booster, supply pressure regulator

*) When no specifications are made, a suggestion is provided bySAMSON

25 T 8000-1 EN

Specification sheet for control valves

T 8000-1 EN

SAMSON AG · MESS- UND REGELTECHNIKWeismüllerstraße 3 · 60314 Frankfurt am Main · GermanyPhone: + 49 69 4009-0 · Fax: +49 69 4009-1507Internet: http://www.samson.de 2

01

1-0

1

Specification sheet for control valves according to IEC 60534-7 · - Details that must be specified to select and size the valve

1 Site of installation

2 Control task

7 Pipeline DN ... PN ... Class ...

8 Pipe material

12 Process medium

13 State at the valve inlet ¤ - Liquid ¤ - Vapor ¤ - Gas

15

Ope

ratin

gda

ta Min. Usual Max. Unit

16 Flow rate

17 Inlet pressure p1

18 Output pressure p2

19 Temperature T1

20 Input density �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 … dB(A)

35 Type .... Valve

36 Valve body style

38 Nominal pressure PN ...

39 Nominal size DN ...

40

Val

vebo

dy

Type of end connections ¤ - Flange ¤ - Welding ends ¤ - Welding-neck ends ¤ - DIN / ¤ - ANSI

43 Type of bonnet ¤ - Normal ¤ - Insulating section ¤ - Bellows seal ¤ - Heating jacket

45 Body/bonnet material

47 Characteristic ¤ - Linear ¤ - Equal percentage

48 Plug/plug stem material

49 Bushing/seat material

52 Hard facing ¤ - None ¤ - Partially stellited ¤ - Solid Stellite ¤ - Hardened

54 Leakage class ¤ - % KVS ¤ - Class ...

55 Packing material ¤ - Standard ¤ - Form ...

57 Actuator type ¤ - Pneumatic

60 Effective area … cm2

62

Act

uato

r

Supply pressure Min. ... Max. ...

63 Bench range

64 Fail-safe action ¤ - Fail Close ¤ - Fail Open ¤ - Fail in Position

66 Other type of actuator ¤ - Electric ¤ - Electrohydraulic ¤ - Hand-operated

67 Fail-safe position for three-way valve

68 Additional manual override ¤ - No ¤ - Yes

70

Posi

tione

r

Positioner

71 Input signal ¤ - Pneumatic ¤ - Electric

72 Control valve OPEN at … bar … mA

73 Control valve CLOSED at … bar … mA

76 Air connection max. … bar

78 Explosion protection ¤ - EEx i ¤ - EEx d

80

Lim

itsw

itch

Type of limit switch

81 Limit switch ¤ - Electric ¤ - Inductive ¤ - Pneumatic

82 Switching position ¤ - CLOSED ¤ - … % travel ¤ - OPEN

83 Switching function ¤ - Closing ¤ - Opening

84 Explosion protection ¤ - EEx i ¤ - EEx d

86

Sol.

valv

e

Type of solenoid valve

87 Style ¤ - 2-way ¤ - 3-way

88 If power fails, the valve should be ¤ - OPEN ¤ - CLOSED ¤ - In last position

91 Electric data … V … Hz … W

Documents

Series 240 · 250 · 280 · Pfeiffer DN 10 … 600 · PN 10