Edition July 2001

Information Sheet T 8000-1 EN

Associated Data Sheets T 8012 EN to T 8097 ENT 8250 EN to T 8265 EN

Series 240 ⋅ 250 ⋅ 280

Pneumatic and Electric Control Valves

Information Sheet

DN 15 ... 500 � PN 10 ... 400 � �200 ... 500 °C 1/2� ... 16� � Class 125 ... 2500 � �325 ... 930 °FDN 15A ... 250A � JIS 10K/20K � �200 ... 500 °C

2 T 8000-1 EN

Contents

SAMSON Control Valves Series 240, 250, 280 and Valves for Special Applications 7

Table 1a ⋅ Control Valves - Series 240 and Valves for Special Applications 8Table 1b ⋅ Control Valves - Series 250 9Table 1c ⋅ Steam-converting Valves - Series 280 9

Series 240 Globe Valve Type 241 10Forged Steel Version Type 241 10Control and Quick-acting Shut-off Valve Type 241-Gas 10Control and Quick-acting Shut-off Valve Type 241-Oil 10Control Valve with Fail-safe ActionType 241 Typetested 11Three-way Valve Type 3244 11

Valves for Special Applications Cryogenic Valve Type 3248 11Control Valve for Aseptic Operation Type 3249 11Diaphragm Control Valve Type 3345 12Control Valve for Food Processing Type 3347 12Pneumatic ON/OFF Valve Type 3351 12Micro-flow Control Valve Type 3510 12

Series 250 Globe Valve Type 251 13Three-way Valve Type 253 13Globe Valve Type 254 13Globe Valve with Axial Multi-stage Throttling Plug Type 255 13Angle Valve Type 256 14High Pressure Valve Type 3252 14

Series 280 Steam-converting Valves Type 281 and Type 286 14Steam-converting Valve Type 284 14

Control Valves in Detail

Valve body and stylesGlobe Valve 15Three-way Valve 15Angle Valve 15Cryogenic Valve 16Control Valve for Food Processing 16Diaphragm Control Valve 16ON/OFF Valve 17Micro-flow Control Valve 17Steam-converting Valve 17

Valve bonnet Packing 17Steam line connection 18

The Trim Units Seat and PlugSeat Leakage 18Table 2 ⋅ Plug sealing and leakage rate 18Pressure-balanced Plug 19Control Valves with Ceramic Trim Units 19Low-noise Operation with Flow Divider 19

Additional EquipmentMetal Bellows Seal 20Insulating Section 20Heating Jacket 20

Face-to-face Dimensions 21

Types of Piping Connections 21

Valve-specific Parameters Kvs value 21Inherent Characteristic 21Rangeability 21

Actuators Pneumatic Actuators 22Electric Actuators 22Electrohydraulic Actuators 22Hand-operated Actuators 22

Accessories for Control ValvesPositioner 23Limit Switch 23Position Transmitter / Potentiometer 23Solenoid Valve 23Lock-up Valve 23Pneumatic Remote Adjuster 23Pressure Regulator 23Pressure Regulator with Air Filter 23Pneumatic Amplifier 23

Valve Sizing Calculation of the Kv value 24Valve Selection 24

Calculation of the Sound Emission z value 25Table 3 a ⋅ Series 240 25Table 3 b ⋅ Series 250 25Gases and Vapors 26Liquids 26

Materials according to DIN and ANSI/ASME Table 4 ⋅ Materials 27

Selection and Ordering Text Selection and Sizing of the Control Valve 27Ordering Text 27

Data Sheet for Control Valves ⋅according to DIN EN 60 534-7 28

SAMSON Control ValvesThe SAMSON Control Valves Series 240, 250 and 280 com-prise pneumatic and electric globe valves, three-way valves andangle valves. Their application range extends from control tasksin process and industrial plants to the use in plant engineeringand supply and distribution systems.The modular system allows easy retrofitting and servicing.The control valves consist of the valve and the actuator. As anoption, they can be equipped with pneumatic, electric, electro-hydraulic or hand-operated actuators. For controlling purposes and travel indication, accessories suchas positioners, limit switches and solenoid valves can either beattached directly (see p. 23 and Information Sheet T 8350 EN)or according to DIN EN 60 534-6 (NAMUR rib). The valve bodies are made of cast iron, spheroidal graphiteiron, cast steel , stainless or cold-resisting cast steel, forged steelor stainless forged steel and also special materials. With thecompletely corrosion-resistant version, all the parts of the valveand the body of the pneumatic actuator are made of stainlesssteel. Please refer to the associated Data Sheets for details.

Series 240Control Valve Series 240 are available in nominal sizes fromDN 15 to DN 250 (1⁄2� to 10�) and up to a nominal pressurePN 40 (Class 300). Control valves in the standard version are suitable for tempera-tures of −10 to +220 °C (15 to 430 °F). In addition, theapplication range can be extended by means of an insulatingsection to the temperature range −200 to +450 °C (−325 to+840 °F). The plug stem is sealed either by a self-adjustable PTFE V-ringpacking or an adjustable packing. If the external tightness of theseal is subject to particular stress, a stainless steel bellows isused. The Type 241 Control Valves can be equipped with a heatingjacket that may also cover the bellows.

Series 250The Control Valves Series 250 are used for large nominal sizesand/or high pressures in process and plant engineering as wellas in supply and distribution systems. Apart from globe valves, three-way valves and angle valves,four-flange bodies with bottom plug stem guide, valves withaxial multi-stage throttling plug, we are well prepared to de-velop customer-specific versions. The valves are manufactured in nominal sizes from DN 15 toDN 500 (1⁄2� to 16�) and for nominal pressures betweenPN 16 and PN 400 (Class 150 to 2500). Control valves in standard version are suitable for temperaturesbetween −10 and +220 °C (15 to 430 °F), however, whenusing adjustable high-temperature packings, the valves aresuitable for temperatures from −10 to +350 °C (15 to 660 °F),and with bellows or insulating section from −200 to+500 °C (−325 to +930 °F).

Series 280The Steam-converting Valves Series 280 are used whenever thesteam pressure and steam temperature must be reduced simul-taneously. Their application range extends from heat-economi-cal energy and plant optimization to the use in process plants,e.g. refineries, food and luxury food industries or pulp andpaper industries.Steam-converting valves are based on Series 250 Valves withFlow Divider St III, including an additional cooling water con-nection.They are available in nominal sizes from DN 50 to DN 400(1⁄2� to 16�), for nominal pressures of PN 16 to PN 400(Class 150 to 2500) and for temperatures up to 500 °C(930 °F).

Valves for Special ApplicationsThese valves have been developed for special requirements.They essentially include cryogenic valves, valves for food pro-cessing, diaphragm control valves and micro-flow controlvalves.

3 T 8000-1 EN

T 8000-1 EN4

Table 1a � Control Valves - Series 240 and Valves for Special Applications

Globe valves, three-way valves and angle valves � Survey of types

Control valve Series 240 For Special Applications

Type241

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 mixing or diverting valve �

Angle valve � � � �

Standard versionDIN � � � � � � � � � � �

ANSI � � � � � � � � � �

JIS � �

Specialapplica-tions

Low flow rates �

Gas, typetested acc. to DIN EN 161 �

Liquid fuels, DIN EN 264 �

Typetested acc. to DIN 32 730 �

ON/OFF valve �

Pharmaceutical/food industry � � �

Cryogenic technology �

Nominal sizes DN15...250

15...150

15...100

15...150

15...150

15...150

15... 50

15...150

15...125

15...100

10,15, 25

[in] 1⁄2 ... 10 1⁄2...6 1⁄2...6 1⁄2 ... 6 1⁄2 ... 2 1⁄2...6 1⁄2...5 1⁄2 ... 4 1⁄4...1

Nominal pressure

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

Class125,300

300 150,300

150,300

150 psi 240 psi 150,300

300...2500

JIS10/20

KRF

Perm. temperatures and differential pressures See associated Data Sheet

Body material

Cast iron GG-25, WN 0.6025 � � � � �

Spheroidal graphite iron GGG-40.3,WN 0.7043

� � �

Cast steel GS-C25, WN 1.0619 � � � � � �

Stainless cast steel, WN 1.4581 � � � � � � 1.4404 �

Forged steel WN 1.0460 � � � �

Stainless forged steel WN 1.4571 � � � � � � �

ASTM A 126 B, cast iron � �

ASTM A 216 WCB, carbon steel � � �

ASTM A 351 CF8M, stainl. carbon steel � � � A351CF8 � �

G-X 6 Cr Ni 189 WN 1.4308 �

GS 21 Mn5, WN 1.1138 �

Special material � � � � � � �

Plug

With metal sealing � � � � � � � � �

Lapped-in metal � � � � �

With soft sealing � � � � � � � �

Pressure-balanced � � �

Diaphragm sealing � �

Option

Insulating section � � � � � �

Metal bellows seal � � � � � � �

Heating jacket � � �

Low-noise (flow divider) � � � �

ConnectionFlange � � � � � � � � � �

Welding ends � � � � � � � �

Special connections � � � � � �

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

5 T 8000-1 EN

Table 1b � Control Valves - Series 250

Globe valves, three-way valves and angle valves � Survey of types

Type 251 253 254 255 W&T 256 3259 3252

Data Sheet T ... EN 8051 8052 8055 8060 8061 8062 9933 8065 8066 8059 8053

Globe valve � � � � � � �

Three-way mixing or diverting valve �

Angle valve � � � � �

Standard versionDIN � � � � � � IG �

ANSI � � � � � � �

Nominal sizesDN 15...200 15...400 80...500 50...500 25...150 15...200 16...90 15...25

[in] 1⁄2...8 1⁄2...12 3...16 2...20 1...6 1⁄2...8 1⁄2...1

Nominal pressurePN 16...400 10...160 16...400 16...400 16...400 16...400 325 40...400

Class 150...2500

150...2500

150...2500

150...2500

150...2500

150...2500

300...2500

Perm. temperatures and differential pressures See associated Data Sheet

Bodymaterial

Cast steel GS- C25, WN 1.0619 � � � � �

Cast steel GS-17CrMo55, WN 1.7357 � � � �

Stainless cast steel WN 1.4581

� � � � � 1.4404

ASTM A 216 WCB , carbon steel � � �

ASTM A 217 WC 6 � � �

ASTM A 351 CF8M, stainl.carbon steel � � � A316L

Special material � � � � � 1.4571

Plug

With metal sealing � � � � � � � � � � �

Lapped-in metal � � � � � � � �

With soft sealing � � � � � � � �

Pressure balanced � � � � � � �

Ceramic trim � � � �

Onrequest

Insulating section � � � � � � � � � �

Metal bellows seal � � � � � � � � � �

Heating jacket � � � � � �

Low-noise (flow divider) � � � � � �

Flanges � � � � � � � � � � �

Connection Welding ends � � � � � � � � � �

Special connections � � � � � � � �

Data Sheet T ... EN 8051 8052 8055 8060 8061 8062 9933 8065 8066 8059 8053

Table 1c � Steam-converting Valves - Series 280

Type 281-1 284-1 286-1

Nominal sizes DN 50 ... 200 100 ... 400 50 ... 200

in 2 ... 8 4 ... 16 2 ... 8

Data Sheet T ...EN 8251 8254 8251

Technical data (DIN/ANSI) according to Type 251 Type 254 Type 256

Series 240Type 241 Globe Valve (T 8012 EN to T 8022 EN)

This valve is used for various applications in process andindustrial plants as well as in plant engineering and supply anddistribution systems. Versions according to DIN, ANSI and JISare manufactured in series.Valve bodies made of cast iron, spheroidal graphite iron, caststeel, stainless or cold-resisting cast steel. Nominal size DN 15 ... 250 (1⁄2� ... 10�)

Nominal pressure PN 10 ... 40 (ANSI Class 150 ... 300; JIS 10/20 K)

Temperature range −200 ... +450 °CValve plug with metal sealing, soft sealing, or lapped-in metalsealing.Further versions including adjustable packing, metal bellowsseal, insulating section, heating jacket and flow divider forreducing the sound emission.

Type 241 Forged steel Version (T 8015 EN)

Valve body and valve bonnet made of steel C22.8 or stainlesssteel WN 1.4571. Nominal size DN 15 ... 80 Nominal pressure PN 16 ... 40 Temperature range −200 ... +450 °C Further details and versions are the same as for the cast bodyof Type 241 (see above).

Type 241-Gas Pneumatic Control and Quick-acting Shut-offValve for gases (T 8020 EN)

The safety shut-off valve for all gases typetested according toDIN EN 161 can at the same time be used as control valve(DIN-DVGW typetested). This control valve is equipped with a solenoid valve and astrainer. The plug stem is sealed with a stainless steel bellows.The bellows seal includes a test connection and a self-adjustablebackup stuffing box. Valve body made of cast steel, stainless cast steel or forged steel.Nominal size DN 15 ... 150 (1⁄2�...6�)

Nominal pressure PN 40 (ANSI Class 300)Temperature range −20 ... +220 °C Ambient temperature −20 ... +60 °CValve plug with soft sealing.

Type 241-Oil Pneumatic Control and Quick-acting Shut-offValve for liquid fuels and liquid gases in their liquid state

(T 8022 EN)

Control valve typetested according to DIN EN 264 used ascontrol and quick-acting shut-off valve for furnaces operated byliquid fuel. Control valve with solenoid valve and strainer.Valve body made of cast steel, stainless cast steel WN 1.4571or forged steel C22.8. Nominal size DN 15 ... 100 Nominal pressure PN 16 and PN 40 Permissible temperature 350 °C Ambient temperature −15 ... +60 °CValve plug with soft sealing, or lapped-in metal sealing.Further versions with metal bellows seal available.

6 T 8000-1 EN

Type 241-1

Type 241-7, forged steel

Type 241-Gas with bellows seal and Type 241-Oil, bothwith positioner, solenoid valve and strainer.

Type 241 Pneumatic Control Valve with Fail-safe Action,Typetested (T 8016 EN)

The control valve typetested according to DIN 32 730 can beused as control valve and at the same time as safety temperaturelimiter or pressure limiter. The standard version is suitable forwater and steam up to 220°C, the version with insulating sectionup to 350°C. The control valve is equipped with a Type 3701 Solenoid Valve.Valve body made of cast iron, spheroidal graphite iron, caststeel or stainless cast steel as well as forged steel and stainlessforged steel. Nominal size DN 15 ... 150 Nominal pressure PN 16 ... 40 Perm. temperature 350 °C Valve plug with metal sealing.

Type 3244 Three-way Valve (T 8026 EN)

Control valve for mixing and diverting service according to DINor ANSI standards. Mixing or diverting service is determined by the arrangement ofthe valve plug at the factory (see valve body on p. 15).Valve body made of cast iron, cast steel or stainless cast steel(according to DIN or ASTM specifications).Nominal size DN 15 ... 150 (1⁄2� ... 6�)

Nominal pressure PN 10 ... 40 (Cl 150 ... 300)Temperature range −200 ... +450 °CValve plug with metal sealing. Further versions with insulating section, adjustable packing,metal bellows seal, heating jacket and additional handwheelavailable.

Valves for Special ApplicationsType 3248 Cryogenic Valve (T8093 EN)

Control valve used for liquid gases in the field of cryogenicengineering. Installation in vacuum-insulated pipelines. Nominal sizes DN 15 ... 150 (1⁄2� ... 6�)

Nominal pressure PN 16 ... 40 (Class 150 ... 300) Temperature range −200 ... +220 °CValve plug with metal sealing. Metal bellows seal with backup stuffing box.Special version with aluminum body.

Type 3249 Control Valve for Aseptic Service (T8048 EN)

Angle valve for food and pharmaceutical industries accordingto DIN or ANSI standards. PTFE-coated EPDM diaphragm serves as external sealing; ad-ditional test connection and backup stuffing box.Nominal size DN 15 ... 50 (1⁄2� ... 2�)

Maximum pressure 10 bar (150 psi)Temperature range −10 ... +130 °CVersions with threaded coupling, conical coupling and slottedround nut or flanges, and according to ANSI with flanges orclamp weld-on coupling available.

7 T 8000-1 EN

Type 241-1, typetested

Type 3244-7

Type 3248-7

Type 3249-7

Type 3345 Diaphragm Control Valve (T 8031 EN)

Control valve for viscous, corrosive and abrasive fluids accord-ing to DIN or ANSI standards.Valve body made of cast iron, spheroidal graphite iron orstainless cast steel with or without lining.Valve diaphragm made of butyl, viton or ethylene propylene(also with PTFE protective facing). Nominal size DN 15 ... 150 (1⁄2� ... 6�)

Nominal pressure PN 10 Temperature range −10 ... +100 °C Versions for higher temperatures available on request.

Type 3347 Control Valve for Food Processing (T 8097 EN)

Angle valve for food and pharmaceutical industries as well asfor biochemistry equipped with weld-on, screw or clamp con-nections.Nominal size DN 25 ... 125 (1⁄2� ... 5�)

Maximum pressure 16 bar (240 psi)Temperature range −10 ... +150 °C (15 ... 300 °F)

Type 3351 Pneumatic ON/OFF Control Valve (T 8039 EN)

On/Off valve with tight closure for liquids, non-flammablegases and steam.Valve body made of cast iron, cast steel or stainless cast steel. Nominal size DN 15 ... 100 (1⁄2� ... 4�)

Nominal pressure PN 16 ... 40 (Class 150 and 300)Temperature range −10 ... +220 °C Valve plug with metal sealing as well as with soft sealing. Self-adjustable PTFE V-ring packing. Further versions with additional handwheel available.

Type 3510 Micro-flow Control Valve (T8091 EN)

Stainless steel control valve for low flow rates designed as globevalve or angle valve. Nominal size DN 10, 15 and 25 (1⁄4�, 3⁄8�, 1⁄2�)

Nominal pressure PN 40 ... 400 (Class 150...2500)Temperature range −200 ... +550 °CVersions with insulating section or metal bellows seal available.

8 T 8000-1 EN

Type 3345-1

Type 3347-7

Type 3510-7

Type 3351-1

Series 250Type 251 Globe Valve (T 8051/52 EN)

Control Valves for process and plant engineering as well as forsupply and distribution systems. Suitable for large nominal sizesand/or high pressures according to DIN and ANSI standards. Valve body made of high-temperature, cold-resisting or stain-less cast steel. Nominal size DN 15 ... 200 (1⁄2� ... 8�)

Nominal pressure PN 16 ... 400 (ANSI Class 150 ... 2500)Temperature range −200 ... +500 °CValve plug with metal sealing, soft sealing, or lapped-in metalsealing.Further versions with metal bellows seal, insulating section,heating jacket, flow divider for reducing the noise emission, orwith pressure-balanced valve plug available.

Type 253 Three-way Valve (T 8055 EN)

Control valve for mixing or diverting service.Valve body made of cast iron, high-temperature, cold-resistingor stainless cast steel. Nominal size DN 15 ... 400 Nominal pressure PN 10 ... 160 Temperature range −200 ... +500 °C Valve plug with metal sealing. Further versions with metal bellows seal or insulating sectionavailable.

Type 254 Globe Valve (T 8060/61 EN)

Control Valve for process engineering according to DIN orANSI standards. Valve body made of high-temperature, cold-resisting or stain-less cast steel. Nominal size DN 80 ... 500 (3� ... 16�) Nominal pressure PN 16 ... 400 (ANSI Class 150 ... 2500)Temperature range −200 ... +500 °CValve plug with metal sealing, soft sealing, or lapped-in metalsealing. The valve has an additional plug stem guide in thebottom flange of the body. Further versions with additional metal bellows seal, insulatingsection, heating jacket, flow divider for reducing the noiseemission, or with pressure-balanced valve plug.

Type 255 Globe Valve with Axial Multi-stage Throttling Plug (T 8062 EN)

Control valve used for low-noise and low-wear service at highdifferential pressures. Axial throttling plug with either three orfive stages including an additional bottom plug stem guide. Valve body made of cast steel, high-temperature, cold-resistingor stainless cast steel. Nominal size DN 50 ... 500 (2� ... 20�)Nominal pressure PN 16 ... 160 (Class 150 ... 2500)Temperature range −200 ... +500 °C Valve plug with metal sealing, soft sealing, or with pressure-bal-anced plug. Further versions with metal bellows seal or insulating sectionavailable.

9 T 8000-1 EN

Type 253-1Type 251-1 Type 254-1 or Type 255-1

Type 256 Angle Valve (T 8065/66 EN)

Control valve for process engineering according to DIN or ANSIstandards.Valve body made of high-temperature, cold-resisting or stain-less cast steel.Nominal size DN 15 ... 200 (1⁄2� ... 8�)

Nominal pressure PN 16 ... 400 (Class 150 ... 2500)Temperature range −200 ... +500 °CValve plug with metal sealing, soft sealing, or lapped-in metalsealing.Further versions with additional metal bellows seal, insulatingsection, heating jacket, flow divider for reducing the noiseemission, or with pressure-balanced plug.

Type 3252 High Pressure Valve (T 8053 EN)

Control valve with a globe or angle valve for controlling smallflow rates in process engineering.Valve body made of stainless cast steel. Nominal size G 1⁄2� ... 1� NPT 1⁄2� ... 1�

DN 15 ... 25 ANSI 1⁄2� ... 1�

Nominal pressure PN 40... 400 (Class 300 ... 2500)Temperature range −200 ... +450 °C Valve plug with metal sealing.Further versions with metal bellows seal, insulating sectionavailable. Connection with female thread, welding ends or flanges.Other body materials also available.

Series 280Control valves for process engineering or for use in the field ofheat technology in order to simultaneously reduce the steampressure and steam temperature.Types 281 and 286 Steam-converting Valves (T8251 EN)

Globe valve (Type 281) or angle valve (Type 286) according toDIN or ANSI standards.Nominal size DN 50 ... 200 (2� ... 8�)Nominal pressure PN 16 ... 400 (Class 300 ... 2500)Temperature range up to 550 °C

Type 284 Steam-converting Valve (T 8254 EN)

Globe valve with four-flange body and double-guided plugstem according to DIN or ANSI standards.Nominal size DN 100 ... 400 (4� ... 16�)Nominal pressure PN 16 ... 400 (Class 300 ... 2500)Temperature range up to 550 °C

10 T 8000-1 EN

Type 281-1

Type 284-1Type 3252-7

Type 256-1

Control Valves in Detail

Valve Body and Valve StylesThe valve body, the bonnet and in some cases the bottom flangeare subject to internal stress caused by the process mediumflowing through the valve. Thus the valves must be sufficientlyresistant to mechanical and chemical stress. Under the influence of the operating temperature, the materialstrength changes. This behavior can be improved by combiningcertain alloys. For this reason, high-temperature materials areused at high temperatures ( e.g. according to DIN 17 245) andcold-resisting materials are used at cryogenic temperatures. Thematerials table on page 27 and the AD Specification Sheet W10 provide you with an overview.

Globe valve

Globe valves allow easy installation in straight pipelines. Fornominal pressures up to PN 40 and nominal sizes up to DN250, three-flange bodies of the Series 240 are mainly used. Theplug stem is guided in the valve bonnet, and the V-port plug inthe screwed seat. The ports of the V-port plug are asymmetric in order to damposcillations.

To resist higher stress and when larger seat diameters are used,the Type 254 Globe Valve of the Series 250 is provided with anadditional plug stem guide in the bottom flange.

Three-way valve

For mixing or diverting service, three-way valves are used.

The mode of operation depends on how the two plugs arearranged. The direction of flow is indicated by arrows.

Angle valveAngle valves are ideally installed when a vertical pipeline anda horizontal pipeline need to be connected. The process medi-um is only diverted once. Angle valves allow the condensate tobe optimally treated, and are practically entirely self draining.When the process medium flows in the closing direction of theplug, wear in the valve outlet is substantially reduced.For process media containing solids, the outlet of the Type 256Control Valves can additionally be provided with a ceramicwear-resistant pipe.

11 T 8000-1 EN

Type 241

Type 254

AB A

B

Mixing service using Type 3244 Three-way Valve

AB A

B

Diverting service using Type 3244 Three-way Valve

Type 256

Cryogenic valveIn plants producing liquefied, cryogenic atmospheric gases,vacuum-insulated pipelines are often used in order to avoidenvironmental heat to be transferred to the medium. The controlvalves can be integrated in the vacuum jacket by means of aconnecting flange. Constructional measures widely preventthermal conduction to the effect that the spindle remains free ofice. The primary sealing is a bellows seal. The jacketed pipelineis evacuated of air after the installation of the components andclosed. The temperature-insulating extension of the control val-ves is often welded to the jacketed pipeline via a flange, andtherefore considerable efforts are necessary when the valve isto be removed from the pipeline. However, to make maintenan-ce possible, the internal parts can be accessed via the tempera-ture-insulating extension without the need to remove the valvefrom the pipeline.

Valve for food processing

Valves for food processing are angle valves made of stainlesssteel. The internal surfaces exposed to the process medium areprecision turned or polished. The valve bodies are self drainingand can be cleaned (CIP) or sterilized (SIP) without beingdisassembled. The spindle of Type 3249 is sealed with a specialdiaphragm, thus preventing the trapping of bacteria.

The Type 3347 Control Valve can be supplied with welding ends,a threaded or a clamp connection according to ISO 2852, andwith a steam line connection if higher purity requirements are to bemet.

Diaphragm control valveFor viscous or corrosive media possibly containing solids, di-aphragm control valves free of dead space and without stuffingboxes are an economical solution. The diaphragm may bemade of rubber, nitrile, butyl or PTFE. The valve body mayadditionally be lined with rubber or PTFE.

12 T 8000-1 EN

Type 3248

Type 3249

Type 3347

Type 3345

ON/OFF valve

The ON/OFF valve is used whenever liquids, non-flammablegases or steam require tight closure. As the valve plug isequipped with both a metal sealing and a soft sealing, theleakage flow rate class VI is obtained.

Micro-flow control valve

For low flow rates (Kv value <1.6 to 10−5 m3/h), micro-flowcontrol valves are used.The parts exposed to the process medium are generally madeof stainless steel WN 1.4571. All valve parts are made ofsemi-finished products. As a result, special materials can beused in a particularly cost-effective manner, and the valve issuitable for a wide range of applications.

Steam-converting valvesSteam-converting valves can reduce the steam pressure and thesteam temperature at the same time. A connecting tube is usedto direct the cooling water to the flow divider St III. At its inneredge, the cooling water meets the steam flow. The flow dividerconsists of a wire mesh with narrow openings where the steamflow and the entrained water are mixed. As the cooling waterdoes not get into contact with the valve body, neither erosionnor thermal shock occur. The flow divider ensures low-noise andlow-vibration operation.

Valve BonnetThe valve bonnet is the upper portion or top closure of the valveand incorporates the stuffing box and the plug stem guide. ForSeries 240, the valve bonnet and the yoke are made as onepiece. For Series 250 and 280, the valve bonnet and the yokeare screwed together. Attached to the yoke, the so-calledNAMUR rib standardized according to EN 60 534-6 allowseasy, standardized attachment of a positioner or other acces-sories. The valve bonnet is a pressure-carrying part and ex-posed to the process medium, therefore its material is subject tothe same design requirements as the valve body.

Packing

The plug stem is sealed with the packing. Versions with bellowsseal or insulating section are provided with a self-adjustableV-ring packing (PTFE-carbon compound - black), whereasstandard versions are equipped with a backup stuffing box. The temperature range of the standard packing from −10 to220 °C can be extended when an insulating piece is added tothe valve bonnet.

For special applications, the adjustable packings type A to typeW may be installed.

Standard packing Temp. range −10 ... +220 °C w. insulating piece −200 ... +400 °CSelf-adjustable, spring-loaded V-ring packing made ofPTFE-carbon compound for nominal sizes from DN 15 toDN 150. Suitable for all applications that require a tight seal and minimum maintenance.

13 T 8000-1 EN

A B

Type 3351

Type 3510

Type 281

Series 240 Valve Bonnet

Series 250 Valve Bonnet

Type A Temp. range −10 ... +220 °C w. insulating piece −200 ... +400 °C Adjustable, PTFE silk cord / PTFE carbon packing,free of dead space. Especially suitable for fluids that polymerize or crystallize out.For DN 15 to 150, maximum PN 160, the packing can beused with oxygen in the temperature range from -50 to +200 °C when using a special lubricant (certified by theBundesamt für Materialprüfung, i.e. the German Federal Office for Materials Testing).

Type B Temp. range −10 ... +220 °C w. insulating piece −200 ... +400 °CAdjustable PTFE silk/PTFE white packing, free of dead space.Application and data same as for type A.

Type C Temp. range −200 ... +220 °C w. insulating pieceAdjustable packing made of braided PTFE silk cord, free of dead space.Application for all chemicals including hot acids and alkaline solutions.

Type H Temp. range up to 350 °CAdjustable PTFE-free high-temperature packing made of pure graphite and carbon rings laid alternately one over the other. Especially suitable for hot steam.

Type W Temp. range −10 ... +220 °CFor DN 15 to 150, maximum PN 40Adjustable packing that is free of dead space. Consists of plastic fiber sealing rings and carbon bushings used for fresh water and service water. The carbon bushings are used as wiper rings.Especially suitable for hard water and possibledeposits at the plug stem.

Steam line connectionTo meet the requirements regarding purity in the food andpharmaceutical industries, the Type 3347 Control Valve can beprovided with a valve bonnet including a steam line connection.Steam or a sterilizing liquid is made to flow around the plugstem between the two PTFE V-ring packings. As a result, abacteria trap is prevented.

The Trim Units Seat and PlugThe design of the seat and the plug determines the Kvs value andthe characteristic as well as the seat leakage of a valve. The figures show seat-guided V-port plugs with asymmetricports with metal sealing and soft sealing.

The seat, plug and plug stem are made of stainless steel. In somecases the trim units are subject to high stress due to highdifferential pressures, cavitation, flashing and process mediacontaining solids. In order to increase the service life, the seatsand the plugs with metal sealing can be provided with stellitehard facing, and plugs up to DN 100 can be made of purestellite. The seats are screwed so that they can be easily exchanged.They may also be made of other materials.

Seat leakage

The seat leakage is determined according to DIN EN 60 534Part 4. This standard specifies which quantity of the test processmedium (gas or water) maximally flows through the closedcontrol valve under test conditions. For special applications (e.g. using Type 241-Gas or Type 241-Oil)or with shut-off valves (Type 3351), a high leakage class maybe obtained by using a lapped-in metal or a soft seat-plug seal.

Table 2 ⋅ Plug sealing and leakage rate

Seat-plug sealLeakage class acc. to

DIN EN 60 534Seat leakage

% of Kvs

With metal sealing IV ≤ 0.01

Lapped-in metalup to DN 80

IV-S2 ≤ 0.0001

Lapped-in metalfrom DN 100

IV-S1 ≤ 0.0005

With soft sealing VI 0.3 ⋅ ∆p ⋅ fL 1)

PTFE ring withpressure-balanced plug

IV ≤ 0.01

Graphite ring withpressure-balanced plug

III ≤ 0.1

1) Leakage factor fL acc. to DIN EN 60 534 Part 4, Table 4

T 8000-1 EN14

Steam line connection for Type 3347

With metal sealing With soft sealing

Pressure-balanced plug

If the actuating force is not sufficient to control the differentialpressures, pressure-balanced plugs are a good solution. Theplug is designed in such a way that it serves as piston. Theupstream pressure p1 is directed to the back side of the plug viaa borehole in the bottom of the plug. The forces acting on theplug are compensated with exception of the area around theplug 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 leakage rate (see Table 2) andmaintenance of these valves are increasing. Pressure-balancedplugs should not be used for high-temperature process mediaor for media that contain solids or crystallize out. In these cases,we recommend to use a more powerful actuator.

Control valves with ceramic trim units (T 8071 EN)

Control valves with extremely resistant ceramic trim units areused when the body and the trim units are subject to particularlyerosive and abrasive stress.Nominal size DN 25 ... 150Nominal pressure PN 16 ... 400Temperature range up to 500 °CThe following control valves can be equipped with ceramic trimunits:

Type 251 Control Valve,Type 256 Control Valve.

The Type 256 Angle Valve can be equipped with a ceramicwear-resistant pipe. If the process medium flows in the closingdirection of the plug, this version is suitable for extremely erosiveand abrasive stress caused by process media with solids con-tent. Ceramic materials and properties on request.

Low-noise operation with flow divider

For reducing the noise emission and protecting the body againsthigh velocity erosion, the flow dividers St I and St III are used.

The process medium reaches its maximum velocity after havingpassed the restriction between seat and plug. Before creating ahigh-energy, turbulent mixing zone, the process medium hits theinner wall of the flow divider. The flow is divided and alow-noise impulse exchange with the ambient medium takesplace.For noise calculation according to VDMA 24 422, Edition1989, the valve-specific correction values ηG for gases andsteam as well as ηF for liquids are required when using flowdividers. Please refer to the diagrams on page 26 for details.For further details regarding noise calculation, please refer toDIN EN 60354 Part 8-4, or you may consult SAMSON to makethese calculations for you. The Kvs value of the valve trim is reduced when using the flowdivider. The associated Data Sheets include the values KvsI for the flowdivider St I and KvsIII for the flow divider St III.

15 T 8000-1 EN

St I St III

Pressure-balanced plug

Type 256 with ceramic trim units and wear-resistant pipe

Additional Equipment

Metal bellows seal

If a very high external tightness of the seal is required, e.g. forsatisfying the technical requirements of the German TA-Luft orin vacuum technology, a metal bellows is used to seal the plugstem. The top sealing flange of the plug stem is additionallysealed with a packing. This packing fulfills the task of a backupstuffing box. The metal bellows can be checked or provided with a sealingmedium by means of a test connection.The metal bellows seal can be used for valves of the Series 240 from −200 to +400 °C, andSeries 250/280 from −200 to +450 °C.

Insulating section

The application range of a standard packing can be extendedto an operating temperature of less than −10 °C or more than+220 °C with the help of an insulating section. The differentseries have the following temperature ranges:Series 240

−200 ... +450 °C long insulating section −50 ... +450 °C short insulating section

Series 250−200 ... +500 °C

Series 280max. +500 °C

The temperature ranges specified above can be restricted bythe material used according to the pressure-temperature dia-gram.

Heating jacketSome process media are only fluid above a certain temperature.If this temperature is not reached, they become solid or crystal-lize out. To maintain their fluid state, the valve bodies areprovided with a heating jacket. When sealing the plug stem witha metal bellows, the valve bonnet may also be equipped with aheating jacket. A heat transfer medium flowing between valve body and hea-ting jacket ensures that the desired temperature of the processmedium is maintained. If steam is used as heating transfermedium, take care to ensure excellent condensate discharge.

T 8000-1 EN16

Type 241 without and with heating of the bellows

Face-to-face DimensionsThe face-to-face dimensions of the globe valves and anglevalves are specified in DIN EN 558. Part 1 includes the dimen-sions for the flange connections (Series F 1 for PN 10 to 40,Series F 2 for PN 63 to 160 and Series F 3 for PN 250 and320). SAMSON Control Valves with welding ends have thesame dimensions as those with flanges. Versions with welded-neck ends are not standardized, their face-to-face dimensionsmust be agreed upon. For control valves according to US standards, the face-to-facedimensions of valves with flanges and welding ends or welded-neck ends are specified in ANSI/ASME B 16.10.

Types of Piping ConnectionsIn industrial plants, flange connections are the preferred solu-tion. This type of connection is characterized by easy assem-bling and disassembling of the valves as well as high reliabilityand tightness of the milled sealing surfaces.A survey of DIN flanges is provided in DIN 2500. Whereas theconnecting dimensions are specified in DIN 2501, and thetypes of the possible sealing faces in DIN 2526. The standard version of SAMSON Control Valves have Type Csealing faces. Other types available on request.

The US standard for flanges is ANSI/ASME B 16.1 for Class125, and for higher nominal pressure ratings ANSI/ASME B16.5. The standard version for valves of Class 125 made of cast ironis manufactured without sealing face (FF-flat face). Valves of Class 300 have a sealing face RF 0.06 (raised facewith 0.06� height), with higher nominal pressure ratings thevalves have a sealing face RF 0.25. Other versions are possible. More details available on request.For critical process media and/or high nominal pressure, thevalve bodies can be supplied with welding ends or welded-neckends. For control valves according to DIN standards, the welding endsare designed according to DIN 3239 T1 with edge forms ac-cording to DIN 2559 T1. For control valves according to US standards, the welding endsare specified in ASME/ANSI B 16.25.For installation methods according to US standards, the controlvalves of Series 240 are available with NPT female thread 1/2�to 2�.

Valve-specific Parameters

Kvs value

The necessary Kv value is calculated according to DIN EN 60534using the specified operating data.For the designation of the valves, the Kvs value is specified in theData Sheets. The Kvs value corresponds to the Kv value for thenominal travel H100. In order to increase control accuracy andwith regard to the manufacturing tolerances, the Kvs valuechosen is to be higher than the Kv value calculated.

Inherent characteristic

The characteristic represents the Kv value�s dependance on thetravel (H). Control valves are provided either with an equal percentage (2)or with a linear (1) characteristic.The equal percentage characteristic means that equal changesin travel result in equal percentage changes of the Kv value inquestion. The linear characteristic means that equal changes in travel arefollowed by equal changes of the Kv value.

Rangeability

The rangeability is Kvs divided by Kvr. For this calculation, theKvr value represents the smallest Kv value with which the char-acteristic lies still within the permissible gradient tolerance of thecharacteristic (DIN EN 60 534 Part 2-4).

T 8000-1 EN17

DIN flange with Type C sealing face

Type F (spring) Type V (raised face)

Type N (groove) Type R (recess)

0 20 40 60 80 100 [%]

100

80

60

40

20

0

Kv [%]

y

1

2

Kv100

Travel [%]

linearequal percentage

Kv0

Actuators Actuators convert the control signal coming e.g. from a posi-tioner into a travel motion carried out by the control valve (plugstem with valve plug).We supply pneumatic, electric and electrohydraulic actuators aswell as hand-operated actuators (see Information SheetT 8300 EN for actuators).

Pneumatic actuators

They are used for pneumatic or electropneumatic instrumenta-tion. Pneumatic actuators are diaphragm actuators with a roll-ing diaphragm and inside springs. Low overall height, strongpositioning force and high speed of response are the typicalfeatures of these actuators. Different signal pressure ranges are available. Pneumatic actu-ators are suitable for use in hazardous areas, and they havefail-safe action: If the air supply fails, the control valve is either closed or opened.

The Type 3277 Pneumatic Actuators allow direct attachment ofpositioners or limit switches. To avoid any damage, the travelpick-off takes place within the yoke below the actuator housing.Pneumatic actuators can additionally be equipped with a hand-wheel (see T 8310 EN and T 8311 EN).

Electric actuators

If compressed air is not available, electric actuators with strongpositioning forces and long travels may be used. These actua-tors are self-locking. Electric actuators are connected to three-step controllers, electricpositioners issuing analog signals or a reversing contactor unit(see T 8330 EN).

Electrohydraulic actuators

These actuators are connected to an analog signal via three-stepcontrollers or electric positioners. Versions with fail-safe actionare available (see T 8340 EN and T 8342 EN).

Hand-operated actuators They 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 withlonger travels are available on request (Type 3273-5/6).

T 8000-1 EN18

Type 3277 Pneumatic Actuator

Type 3271 PneumaticActuator with additional handwheel

Electric actuator

Electrohydraulic actuator

Hand-operated actuator

Accessories for Control Valves SAMSON Control Valves can be equipped with several addi-tional accessories. These accessories are e.g. used for actuatorcontrol and travel indication. They are attached either accord-ing to DIN 60 534 (NAMUR rib) or directly in connection withthe Type 3277 Pneumatic Actuator with an actuating surface ofmax. 700 cm2.

For direct attachment, the entire travel linkage is located in aclosed housing in order to avoid contamination, misadjustmentand also possible injuries of the personnel (for details, seeInformation Sheet T 8350 EN).

Positioner

Positioners (p/p or i/p) compare the signal of a pneumatic orelectric control system (e.g. 0.2 ... 1 bar or 4(0) ... 20 mA) tothe travel (manipulated variable) of the control valve. They issuea pneumatic signal pressure (pst) as output variable. The posi-tioners can be used in standard operation or in split-rangeoperation (see T 8351 EN fol.). Smart versions (HART, PROFIBUS-PA, FOUNDATIONFieldbus) are configured and operated with the help of a PC ora handheld communicator (see T 8380/8382/8383 EN).

Limit switch

Whenever an adjustable limit value is exceeded or not reached,a signal is sent out. Inductive limit switches are the preferredversion. However, versions with electric or pneumatic microswit-ches are also available (see Information Sheet T 8350 EN).

Position transmitter / Potentiometer

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

Solenoid valve

The binary signals of a control system are converted into binarypneumatic control signals. As a result, the control valve canquickly be brought to its final position. The solenoid valves areused for ON/OFF valves or for control valves with fail-safeaction (e.g. Type 241-typetested, T 8016 EN; T 8375 EN).

Lock-up valve

If the supply air pressure falls below an adjusted value, thesignal pressure line is shut off. When this happens, the actuatorstops on its last position (see T 8391 EN).

Pneumatic remote adjuster

Manually adjustable precision regulator for the set point adjust-ment of pneumatic control systems.

Pressure regulator

The pressure regulator provides pneumatic control valves with aconstant air pressure (adjustable between 0 and 6 bar) (see T8546 EN).

Pressure regulator with air filter

This unit consists of a pressure regulator and an air filter holdingback foreign particles, oil and/or condensate (see T 8546 EN).

Pneumatic amplifierFor fast control loops, the actuating time can be made shorterby means of pneumatic volume amplifiers.

T 8000-1 EN19

Pneumatic remote adjuster

Lock-up valve

Solenoid valve

Position transmitteror potentiometer

Limit switch

Positioner

Pressure regulator without and with air filter

Valve Sizing

Calculation of the Kv value

The Kv value is calculated according to DIN EN 60 534. TheData Sheets provide the necessary device-specific data. A preliminary, simplified calculation may be made with the helpof the working equations listed below. They do not take intoaccount the influence of the connecting fittings and the flowlimitation at critical flow velocities.

Valve selection

After having calculated the Kv value, the corresponding Kvsvalue of the valve type in question is selected from the DataSheet. If real operating data have been used for the calculation, applythe following equation: Kv max ≈ 0.7 bis 0.8 ⋅ Kvs .

T 8000-1 EN20

Medium Liquids Gases Steam

Pressure drop m3/h kg/h m3/h kg/h kg/h

p2 > p1

2

Kv = Q √ρ1000 ∆p Kv = W

√1000 ρ ∆p

Kv = QG

519 √ρG T1

∆p p2Kv =

W519

√T1

ρG ∆p p2Kv =

W31.62

√v2

∆ p∆p <

p1

2

p2 < p1

2Kv =

QG

259.5 p1 √ρG T1 Kv =

W259.5 p1

√T1

ρGKv =

W31.62

√2v∗

p1

∆p > p1

2Symbols used:p1 (bar) Absolute pressure pabsp2 (bar) Absolute pressure pabs∆p (bar) Absolute pressure pabsT1 (K) 273 + t1QG (m3/h) Flow rate of gases, referred to

0 °C and 1013 mbar

ρ (kg/m3) Density of liquidsρG (kg/m3) Density of gases at 0 °C and 1013 mbarv1 (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) for p1

2 and t1

p1 Upstream pressurep2 Downstream pressureH TravelQ Flow rate in m3/hW Flow rate in kg/hρ Density in kg/m3

(generally also for liquids)ρ1 Upstream density in kg/m3

(for gases and vapors)t1 Upstream temperature in °C

Calculation of the Sound Emission

z value The valve-specific value z is measured on the valve test benchand provides the basis for the noise calculation.

When the load of the valve is y = 0.75, the value z indicates thepressure ratio upon which cavitation begins.

21 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

Seat∅mm

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

Travel mm 15 30 15 30 60 30 60

DN z ⋅ acoustical valve coefficient

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

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∅mm

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

Travel mm 15 30 60 120

DN z ⋅ acoustical valve coefficient

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 vapors

The noise emission of single-stage and multi-stage control valvesfor gases is determined according to DIN EN 60 534, Part 8-3.This calculation method, however, does not apply to controlvalves with noise-reducing equipment such as flow dividersSt I and St III. In this case, the calculation must be carried outaccording to VDMA 24 422, Edition 89.The calculation is based upon the flow rate generated duringflashing. The sound emission is determined by means of anacoustical conversion coefficient ηG. The difference between theconversion coefficients with relation to the differential pressureratio is shown in Diagram 1. This difference directly indicatesthe level difference of the internal acoustic capacities and alsothe sound pressure level to be expected when 1 m away fromthe pipeline.For a differential pressure ratio of e.g. x = 0.5, the level differencebetween a valve with and without flow divider is −20 dB.

Liquids

The noise emission on throttling liquids is calculated accordingto DIN EN 60 534, Part 8-4. This calculation corresponds withthat according to VDMA 24 422, Edition 89. It is based on theflow capacity generated in the valve and also on the valve-spe-cific acoustical conversion coefficient ηF empirically determinedaccording to VDMA 24 423 for turbulent flows. As well it isbased on the valve-specific pressure ratio zy at the beginning ofcavitation.The sound capacity level and the sound level difference at adistance of 1 m for the valves with different z value can be seenin the diagram 2.When we assume a pressure ratio of xF = 0.5, then a valve withz = 0.6 has a sound level which is 20 dB less than that of a valvewith z = 0.3.

T 8000-1 EN22

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

1 without flow divider2 with flow divider St I3 with flow divider St III

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]ηF

z=0.2 z=0.3 z=0.4 z=0.5 z=0.6 z=0.7 z=0.8

Diagram 2

Materials according to DIN and ANSI/ASMEThe body materials mainly used and their temperature limits arelisted in the following Table.The application limits of these materials are included in theassociated pressure-temperature diagram in the second part ofthis Information Sheet (T 8000-2 EN).

Table 4 ⋅ Materials

IdentificationDIN

Material No.Standard*) Temp.range

[°C]

Cast iron

GG-25 0.6025 DIN 1691 −10 ... +300

A 126 B � ASTM −29 ... +232

FC 250 � JIS

Spheroidal graphite iron

GGG-40.3 0.7043 DIN 1693 −10 ... +350

Cast steel

GS-C25 1.0619 DIN 17 245 −10 ... +400

GS-21 Mn 5 1.1138 SEW 685 −50 ... +300

GS-17 CrMo 55 1.7357 DIN 17 245 −10 ... +500

GS-12 CrMo910 1.7380 SEW 595 −10 ... +600

A 216 WCB � ASTM −29 ... +427

A 352 LCB � ASTM −46 ... +343

A 217 WC 6 � ASTM −29 ... +550

A 217 WC 9 � ASTM −29 ... +550

corresponds to ASTM � JIS −29 ... +427

Stainless carbon steel

G-X6CrNi 189 1.4308 DIN 17 445 −200 ... +300

G-X5CrNiMoNb 1810 1.4581 DIN 17 445 −10 ... +450

A 351 CF 8 � ASTM −200 ... +300

A 351 CF 8 M � ASTM −200 ... +450

corresponds to ASTM � JIS −200 ... +450

Forged steel

C 22.8 1.0460 DIN 17 243 −10 ... +400

A 105 � ASTM −29 ... +427

Stainless forged steel

X6 CrNiMoTi 17 12 2 1.4571 DIN 17 440 −200 ... +450

A 182 F316 � ASTM −200 ... +450

*) The DIN standards stated will be replaced by the European standards - EN 1561, EN 1563 and EN 10213 - after a transition period.

Selection and Ordering text

Selection and sizing of the control valve

1. Calculate the required Kv value according toDIN EN 60534. You may use for example the SAMSONprogram "Valve sizing". This sizing usually is carried out bySAMSON.If real operating data are used for the calculation, apply thefollowing equation: Kvmax ≈ 0.7 to 0.8 ⋅ Kvs.

2. Select the Kvs value and the nominal size DN according tothe table in the corresponding Data Sheet.

3. Select the appropriate characteristic curve on the basis of thebehavior of the controlled system.

4. Determine the permissible differential pressure ∆p and selectan adequate actuator using the differential pressure tablesincluded in the associated Data Sheet.

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

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

Ordering text

Please submit the following details in your order:

Type of control valve: . . . 1)

Nominal size DN: . . . 1)

Nominal pressure PN: . . . 1)

Body material: . . . 1)

Connecting type: Flanged connection/welding ends/welded-neck ends

Plug 1): Standard, pressure-balanced,with metal sealing, soft sealing, orlapped-in metal sealinghard facing, if needed

Characteristic : Equal percentage or linearPneumat. actuator: Versions acc. to T 8310 EN or

T 8311 ENFail-safe action: Valve closed or openActuating time: (please submit this detail only if

special actuating times are required) Process medium: Density in kg/m3

under standard or operating conditions, and temperature in °CFlow rate: In kg/h or m3/h

under standard or operating conditionsPressure: p1 in bar (absolute pressure pabs)

p2 in bar (absolute pressure pabs)

for min., standard and max. flow rateAccessories: Positioner and/or limit switch,

position transmitter, solenoid valve, lock-up valve, volume amplifier, supply pressure regulator

1) If no details have been submitted, SAMSON will make a proposal

23 T 8000-1 EN

Data Sheet for Control Valves ⋅

T 8000-1 EN

Data Sheet for Control Valves ( - Minimum details for the selection and the sizing of one valve)

1O

pera

ting

data

Site of control

2 Measuring and control task7 Pipeline DN ... PN ... Class ...8 Pipe material

12 Process medium13 State at the input - liquid - steam - vapor

15 min. standard max. unit16 Flow rate17 Input pressure p1

18 Output pressure p2

19 Temperature T120 Input density p1 or M21 Steam pressure Pv22 Critical pressure Pc23 Kinematic viscosity v31 Calculation of max. flow rate coefficient Kv

32 Calculation of min. flow rate coefficient Kv

33 Selected flow rate coefficient Kvs

34 Calculated sound pressure level ... dB(A) 35

Val

ve b

ody

Control Valve Type36 Style38 Nominal pressure PN ...39 Nominal size DN ...40 Type of connection - flange - welding end - welded-neck end - DIN / - ANSI43 Bonnet shape - standard - insulating section - bellows seal - heating jacket45 Body/bonnet material47 Characteristic - linear - equal percentage48 Plug/stem material49 Bushing/seat material52 Hard facing - none - partly stellited - purely stellited - hardened54 Leakage class ... % Kvs class ...55 Packing material - standard - type

57

Act

uato

r

Actuator type - pneumatic60 Effective area ... cm2

62 Supply air pressure min. max.63 Bench range64 Fail-safe action - closed - open - stop66 Other operating mode - electric - electrohydraulic - hand-operated67 Fail-safe action with three-way valve68 Additional manual operation - no - yes

70

Posit

ione

r

Positioner Type

71 Input signal - pneumatic - electric72 Control valve opened at ... bar ... mA73 Control valve closed at ... bar ... mA76 Air connection max. ... bar78 Explosion protection - EExi - Exd80

Lim

it sw

itch

Limit switch Type

81 Limit switch - electric - inductive - pneumatic82 Switching position - closed - % travel - open83 Switching function - closing - opening84 Explosion protection - EExi - EExd86

Sole

noid

val

ve

Solenoid valve Type87 Style - 2-way - 3-way88 If power fails, valve should - open - close - stop

91 Electric data ... V ... Hz ... W

according to DIN EN 60 534-7

SAMSON AG ⋅ MESS- UND REGELTECHNIKWeismüllerstraße 3 ⋅ D-60314 Frankfurt am MainTelefon (0 69) 4 00 90 ⋅ Telefax (0 69) 4 00 95 07Internet: http://www.samson.de