DN PN C NPS ¼ Class F DN 15A A JIS 10K/20K C

Transcription

1 Series Pfeiffer W&T Pneumatic and Electric Control Valves Information Sheet Part 1 DN PN C NPS ¼ Class F DN 15A A JIS 10K/20K C Information Sheets Materials/Flow Coeff. T /-3 EN Control Valves T 8012 EN to T 8097 EN Steam-converting Valves T 8250 EN to T 8265 EN Edition September 2007 Information Sheet T EN

2 Contents SAMSON control valves Series 240, 250, 280, W&T and valves for special applications 3 Table 1a Series 240 Control Valves and valves for special applications 4 Table 1b Series 250 Control Valves and W&T Valves 5 Table 1c Steam-converting Valves - Series 280 and W&T 5 Series 240 Type 3241 Globe Valve 6 Type 3241 in forged steel version 6 Type 3241-Gas, Pneumatic Control and Quick-acting Shut-off Valve for gases 6 Type 3241-Oil, Pneumatic Control and Quick-acting Shut-off Valve for liquid fuels and liquified petroleum gas in the liquid phase 6 Type 3241 Control Valve with safety function, typetested 7 Type 3244 Three-way Valve 7 Valves for special applications Type 3248 Cryogenic Valve 7 Type 3249 Control Valve for aseptic service 7 Type 3345 Diaphragm Valve 8 Type 3347 Control Valve for food processing 8 Type 3351 Pneumatic On-off Valve 8 Type 3510 Micro-flow Valve 8 Series 250 and W&T Type 3251 Globe Valve 9 Type 3252 High-pressure Valve 9 Type 3253 Three-way Valve 9 Type 3254 Globe Valve 9 Type 3256 Angle Valve 10 Type 3259 Angle Valve 10 W&T Type RVG Control Valve 10 Lined globe vlaves Pfeiffer Type BR 1a with PTFE lining 10 Pfeiffer Type BR 1b with PFA lining 10 Series 280 and W&T Type 3281 and Type 3286 Steam-converting Valves 11 Type 3284 Steam-converting Valve 11 W&T Type DUV-C3 Steam-converting Valve 11 Control valve details Valve bodies and styles Globe valve 12 Three-way valve 12 Angle valve 12 Cryogenic valve 13 Valve for food processing 13 Diaphragm valve 13 On-off valve 14 Micro-flow valve 14 Steam-converting valve 14 Valve bonnets Packing 14 Steam line connection 15 Seat and plug trims Seat leakage rate 16 Table 2 Plug sealing and seat leakage rate 16 Pressure balancing 16 Control valves with ceramic trims 16 Flow dividers 16 AC trims and silencer 17 Additional components Bellows seal 17 Insulating section 17 Heating jacket 18 Face-to-face dimensions Globe and angle valves acc. to DIN and ANSI 18 Types of pipe connections 18 Valve-specific parameters K VS coefficient 19 Rangeability 19 Inherent characteristic 19 Actuators Pneumatic actuators 20 Electric actuators 20 Electrohydraulic actuators 20 Hand-operated actuators 20 Accessories for control valves Positioners 21 Limit switches 21 Position transmitter/potentiometer 21 Solenoid valves 21 Lock-up valve 21 Pneumatic remote adjuster 21 Supply pressure regulators 21 Supply pressure regulators with air filter 21 Pneumatic volume booster 21 Valve sizing Calculating the K V coefficient 22 Selecting the valve 22 Noise prediction x Fz factor 23 Table 3 Series 240 and Gases and vapors 24 Liquids 24 Materials conforming to DIN and ANSI/ASME Table 4 Materials 25 Selection and ordering Selection and sizing of the control valve 25 Ordering text 25 Specification sheet for control valves 26 2 T EN

3 SAMSON control valves Series 240, 250 and 280 Control Valves include pneumatic and electric globe valves, three-way valves, and angle valves. Their application range covers control tasks in process engineering and industrial applications as well as in supply and power plant engineering. The modular system allows easy retrofitting and servicing. The control valves consist of the valve and the actuator. They can be equipped with pneumatic, electric, electrohydraulic, or hand-operated actuators. For controlling purposes and travel indication, accessories such as positioners, limit switches and solenoid valves can either be attached directly (see page 21 and Information Sheet T 8350 EN) or according to IEC (NAMUR rib). The valve bodies are available in cast iron, spheroidal graphite iron, cast steel, cast stainless or cold-resisting steel, forged steel or forged stainless steel as well as in special materials. All parts of the valve and the pneumatic actuator housing in the completely corrosion-resistant version are made of stainless steel. Refer to the associated data sheets for details. Series 240 Series 240 Control Valves are available in nominal sizes ranging from DN 15 to DN 300 (NPS ½ to 12) and up to a nominal pressure PN 40 (Class 300). Control valves in the standard version are suitable for temperature ranges between 10 and +220 C (15 and 430 F). An insulating section allows the temperature range to be extended to 200 and +450 C ( 325 and +840 F). The plug stem is sealed either by a self-adjusting PTFE V-ring packing or an adjustable packing. To meet stricter emissions control requirements, a stainless steel bellows is used. The Type 3241 Control Valve can be equipped with a heating jacket that may also include the bellows. Series 250 Series 250 Control Valves are used when large nominal sizes and/or high pressures are involved in process engineering, power plant or supply engineering. In addition to globe, three-way and angle valves, four-flanged valve bodies with bottom plug stem guides, and valves with axial multi-stage throttling plugs, customized valve constructions to meet customer specifications can be engineered as well. The valves are manufactured in nominal sizes from DN 15 to DN 500 (NPS ½ to 16) and for nominal pressures between PN 16 and PN 400 (Class 150 to 2500). The standard versions of these control valves are suitable for temperatures ranges between 10 and +220 C (15 and 430 F). This temperature range can, however, be extended by using an adjustable high-temperature packing to a temperature range between 10 and +350 C (15 and 660 F) and by using a bellows seal or an insulating section to a temperature range between 200 and +500 C ( 325 and +930 F). Welland & Tuxhorn valves The Type RVG Pneumatic Control Valve from Welland & Tuxhorn is used in power plants and in the petrochemical industry to control feedwater and other liquids. The valves are manufactured with globe-pattern and angle-pattern bodies in nominal sizes DN 25 to DN 150 (NPS 1 to 6) with nominal pressures PN 16 to PN 400 (ANSI Class 150 to 2500). Series 280 and W&T Series 280 Steam-converting Valves are used to reduce both the steam pressure and steam temperature to optimize plant operation and heat efficiency in process plants, for example, in refineries, food and beverage, tobacco or pulp and paper industries. Steam-converting valves are based on Series 250 Valves fitted with a flow divider St III and an additional spray water connection. They are available in nominal sizes ranging from DN 50 to DN 400 (NPS 1 to 16), with nominal pressures of PN 16 to PN 400 (Class 150 to 2500) and for temperatures up to 500 C (930 F). The Type DUV-C3 Steam-converting Valve from Welland & Tuxhorn is designed for high-pressure ranges and can be engineered with varying inlet and outlet sizes. The inlet nominal sizes range from DN 80 to DN 500 and the outlet nominal sizes from DN 100 to DN Large amounts of spray water can be injected thanks to the integrated atomizing steam cooler. The valve can be operated in a wide load range. Valves for special applications These valves have been developed for special requirements including cryogenic valves, valves for food processing, diaphragm control valves and micro-flow control valves. 3 T EN

4 Table 1a Series 240 Control Valves and valves for special applications Control valve Series 240 For special applications Type 3241 DIN ANSI Gas Oil TÜV Data Sheet T EN Globe valve Three-way valve for mixing or diverting service Angle valve DIN Standard version ANSI Special applications Nominal sizes JIS Low flow rates Typetested for gas, DIN EN 161 Liquid fuels, DIN EN 264 Typetested acc. to DIN On-off valves Pharmaceutical/food industries Cryogenics DN , 15, 25 NPS ½...12 ½...6 ½...6 ½...6 ½...3 ½...6 ½...5 ½...4 ¼...1 PN , , Class Nominal pressure 125, , , psi 125/ psi 150, JIS 10/20 KRF Perm. temperatures and differential pressures Refer to associated data sheet Cast iron, EN-JL1040 Spheroidal graphite iron, EN-JS1049 Cast steel, Cast stainless steel, Forged steel, Forged stainless steel, Body ASTM A 126 B, cast iron material ASTM A 216 WCC, carbon steel ASTM A 351 CF8M, stainl. steel 351CF8 GX5CrNi19-10, G20Mn5, (formerly ) Special materials Metal sealing Plug Lapped-in metal Soft sealing Pressure-balanced Diaphragm seal Insulating section Option Bellows seal Heating jacket Low-noise (flow divider) End connections Flanges Welding ends Special end connections Data Sheet T EN T EN

5 Table 1b Series 250 Control Valves and W&T valves (see Volume 2 of control valve catalog) Type W&T RVG BR 1a BR 1b Data Sheet T EN TB 01a TB 01b Globe valve Three-way valve for mixing or diverting service BR 1d* Angle valve DIN IG Standard version ANSI Nominal sizes Nominal pressure Class Perm. temperatures and differential pressures Body material Plug Option End connections DN NPS ½...8 ½...1 ½ ½ PN /16 10/ Refer to associated data sheet Cast steel, G17CrMo5-5, Cast stainless steel, ASTM A 216 WCC ASTM A 217 WC ASTM A 351 CF8M A316L Special materials lbs 150 lbs / PTFE Metal sealing Lapped-in metal Soft sealing Pressure-balanced Ceramic trim Insulating section Bellows seal PTFE PTFE Heating jacket Low-noise (flow divider) Flange Welding ends Special end connections / PFA Data Sheet T EN TB 01 a TB 01 b Table 1c Steam-converting Valves of the Series 280 and W&T (see Volume 2 of control valve catalog) Type W&T DUV-C3 Nominal sizes DN Inlet: Outlet: NPS Inlet: Outlet: Data Sheet T EN Technical data (DIN/ANSI) acc. to Type 3251 Type 3254 Type T EN

6 Series 240 Type 3241 Globe Valve (T 8012 EN to T 8022 EN) This valve is used for a wide range of applications in process engineering and industrial plants as well as in supply and power plant engineering. Standard valves are available conforming to DIN, ANSI und JIS standards. Valve bodies are manufactured in cast iron, spheroidal graphite iron, cast steel, cast stainless or cold-resisting steel. Nominal size DN NPS ½ 12 Nominal pressure PN ANSI Class JIS 10/20 K Temperature range C F Valve plug with metal sealing, soft sealing, or lapped-in metal. Further versions are available with adjustable packing, bellows seal, insulating section, heating jacket or flow divider to reduce noise emissions. Type 3241 in forged steel version (T 8015 EN) Valve body and bonnet made of forged steel (C22.8) or forged stainless steel Nominal size DN Nominal pressure PN Temperature range C Further specifications and versions are the same as for the Type 3241 Valve in cast version (see above). Type 3241-Gas, Pneumatic Control and Quick-acting Shut-off Valve for gases (T 8020 EN) The safety shut-off valves for gas typetested according to DIN EN 161 can also assume the function of a control valve (DIN-DVGW-typetested). The valve is equipped with a solenoid valve and a strainer. The plug stem is sealed by a corrosion-resistant steel bellows fitted with a test connection and a backup self-adjusting packing. The valve bodies are available in cast steel, cast stainless steel, and forged steel. Nominal size DN NPS ½ 6 Nominal pressure PN 40 ANSI Class 300 Medium temperature Ambient temperature Valve plug with soft sealing C C F F Type 3241-Oil, Pneumatic Control and Quick-acting Shut-off Valve for liquid fuels and liquefied petroleum gas in the liquid phase (T 8022 EN) Control valve typetested acc. to DIN EN 264 as a control and safety shut-off valve for combustion plants burning liquid fuels. The valve is equipped with a solenoid valve and a strainer. The valve bodies are available in cast steel, cast stainless steel or forged steel Nominal size DN NPS ½ 4 Nominal pressure PN 16 and PN 40 ANSI Class 300 Max. medium temp. Ambient temperature 350 C C 662 F F Valve plug with soft sealing or lapped-in metal. Further versions available with bellows seal. Type with forged steel valve body Type Pneumatic Control Valve Type 3241-Gas with bellows seal and Type 3241-Oil, both with positioner, solenoid valve and strainer 6 T EN

7 Type 3241 Pneumatic Control Valve with safety function, typetested (T 8016 EN) The control valve typetested according to DIN can assume the function of a control valve as well as that of a safety temperature limiter or pressure limiter. The standard version is suitable for water and steam up to 220 C, the version with insulating section up to 350 C. The control valve is equipped with a Type 3701 Solenoid Valve. Valve bodies available in cast iron, spheroidal graphite iron, cast steel or cast stainless steel, forged steel and forged stainless steel. Nominal size DN Nominal pressure PN Perm. temperature C Valve plug with metal sealing. Type 3244 Three-way Valve (T 8026 EN) Control valve for mixing and flow-diverting service according to DIN or ANSI standards. Mixing or diverting service is determined by the arrangement of the valve plug at the factory (see valve body on p. 12). Valve bodies available in cast iron, cast steel, or cast stainless steel (according to DIN or ASTM specifications). Nominal size DN NPS ½ 6 Nominal pressure PN ANSI Class Temperature range C F Valves for special applications Type 3248 Cryogenic Valve (T 8093 EN) Control valve used for liquid gases in the field of cryogenic engineering. Installation in cold box or in vacuum-insulated pipelines. Nominal size DN * NPS ½ 6 Nominal pressure PN ANSI Class Temperature range C F * DN 200/NPS 8 and DN 250/NPS 10 on request Valve plug with metal sealing. 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 industries according to DIN or ANSI standards. PTFE-coated EPDM diaphragm serves as external sealing; additional test connection and backup packing. Nominal size DN NPS ½ 3 Maximum pressure 10 bar 150 psi Temperature range C F Versions are available with threaded coupling, conical coupling and slotted round nut or flanges, as well as flanges or clamp weld-on coupling conforming to ANSI requirements. Valve plug with metal sealing. Further versions are available with adjustable packing, bellows seal, insulating section, heating jacket, or additional handwheel. Type typetested Type 3249 Angle valve for aseptic service Type Three-way Valve Type Cryogenic Valve in globe-pattern and aluminium angle-pattern 7 T EN

8 Type 3345 Diaphragm Valve (T 8031 EN) Control valve for viscous, corrosive and abrasive fluids according to DIN or ANSI standards. Valve bodies available in cast iron, spheroidal graphite iron, or cast stainless steel with or without lining. Valve diaphragm made of butyl, FPM (FKM), or ethylene propylene (also with PTFE protective facing). Nominal size DN NPS ½ 6 Nominal pressure PN 10 ANSI Class Temperature range C F Versions for higher temperatures or with FDA approval for the food processing industry available on request. Type 3347 Control Valve for food processing (T 8097 EN) Angle valve for food processing and pharmaceutical industries as well as for in the field of biochemistry equipped with weld-on, screw or clamp connections. Suitable for CIP cleaning. Nominal size DN NPS ½ 5 Maximum pressure 16 bar 240 psi Temperature range C F Version available in full-mold cast body with threaded end connections 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-flammable gases and steam. Valve bodies available in cast iron, cast steel, or cast stainless steel. Nominal size DN NPS ½ 4 Nominal pressure PN ANSI Class Medium temperature Ambient temperature C C F F Valve plug with both metal sealing and soft sealing simultaneously. Self-adjusting PTFE V-ring packing. Further versions are available with insulating section, bellows seal, or additional handwheel. Type 3510 Micro-flow Valve (T 8091 EN) Control valve with either stainless steel globe- or angle-pattern body designed to control very low flow rates in pilot plants and technical research facilities. Nominal size DN 10, 15, 25 NPS 14, 38, 12 Nominal pressure PN ANSI Class Temperature range C F Further versions are available with insulating section or bellows seal. Type Micro-flow Valve Type Valve for food processing Type On-off Valve Type Diaphragm Valve 8 T EN

9 Series 250 and W&T Type 3251 Globe Valve (T 8051/52 EN) Control valve for applications in process engineering and industrial plants as well as in supply and power plant engineering. Suitable for large nominal sizes and/or high pressures according to DIN and ANSI standards. Valve bodies available in high-temperature, cold-resisting or cast stainless steel. Nominal size DN NPS ½ 8 Nominal pressure PN ANSI Class Type 3253 Three-way Valve (T 8055 EN) Control valve for mixing or flow-diverting service. Valve bodies available in cast iron, high-temperature, cold-resisting or cast stainless steel. Nominal size DN NPS ½ 16 Nominal pressure PN ANSI Class Temperature range C F Valve plug with metal sealing. Further versions are available with bellows seal or insulating section. Temperature range C F Valve plug with metal sealing, soft sealing, or lapped-in metal. Further versions are available with bellows seal, insulating section, heating jacket, flow divider to reduce noise emissions, or pressure-balanced plug. Type 3252 High-pressure Valve (T 8053 EN) Control valve with either globe- or angle-pattern body to control low flow rates in process engineering applications. Valve bodies available in cast stainless steel. Nominal size DN NPS ½ 1 Nominal pressure PN ANSI Class Temperature range C F Valve plug with metal sealing. Further versions are available with bellows seal or insulating section. End connections with female thread, welding ends, or flanges. Other valve body materials available on request. Type 3254 Globe Valve (T 8060/61 EN) Control valve for process engineering applications according to DIN or ANSI standards. Valve bodies available in cast iron, high-temperature, cold-resisting or cast stainless steel. Nominal size DN NPS 3 16 Nominal pressure PN ANSI Class Temperature range C F Valve plug with metal sealing, soft sealing, or lapped-in metal. The valve has an additional plug stem guide in the bottom body flange. Further versions are available with bellows seal, insulating section, heating jacket, flow divider to reduce noise emissions, or pressure-balanced plug. Type 3251 Globe Valve Type 3252 High-pressure Valve Type 3253 Three-way Valve Type 3254 Globe Valve 9 T EN

10 Type 3256 Angle Valve (T 8065/66 EN) Control valve for process engineering applications according to DIN or ANSI standards. Valve bodies available in high-temperature, cold-resisting cast steel or cast stainless steel. Nominal size DN NPS ½ 8 Nominal pressure PN ANSI Class Temperature range C F Valve plug with metal sealing, soft sealing, or lapped-in metal. Further versions are available with bellows seal, insulating section, heating jacket, flow divider to reduce noise emissions, or pressure-balanced plug. Type 3259 Angle Valve (T 8059 EN) Control valve for industrial plants with high pressure requirements according to the IG standard Nominal size DN * Nominal pressure PN 325 Temperature range C * Nominal size DN 120 on request The valve body is made of forged stainless steel and the end connections are designed as screwed-on flanges with lens ring gaskets. Valve plug with metal sealing or lapped-in metal. W&T Type RVG Control Valve (T 9933 EN) Single- or multi-stage control valve for power plant applications or the petrochemical industry for feedwater and steam. Valve bodies available in forged steel in globe- or angle-style or Z-style bodies according to DIN or ANSI standards. Application as feedwater, spray or recirculation valve. Nominal size DN NPS 1 6 Nominal pressure PN ANSI Class Temperature range C F Lined valves Valves suitable for corrosive media, in particular, to meet high requirements in chemical plants. Streamlined valve body made of spheroidal graphite iron EN-JS1049. Exchangeable PTFE valve seat and PTFE plug, plug stem sealed by a special PTFE bellows and an additional packing with test connection. Pfeiffer Type BR 1a Globe valve with 5 to 8 mm isostatic PTFE lining Nominal size DN NPS 1 4 Nominal pressure PN ANSI Class 150 Temperature range Up to 200 C Up to 390 F Pfeiffer Type BR 1b Globe valve with 4 to 5 mm thick PFA lining (TB 01a EN) (TB 01b EN) Nominal size DN NPS 1 3 Nominal pressure PN ANSI Class 150 Temperature range Up to 200 C Up to 390 F Other linings and materials available on request. Pfeiffer Type BR 1a PTFE-lined Globe Valve Type 3256 Angle Valve Type 3259 Angle Valve acc. to IG standard W&T Type RVG Globe Valve Pfeiffer Type BR 1b PFA-lined Globe Valve 10 T EN

11 Series 280 Control valves for process engineering or for heat efficiency to reduce steam pressure and steam temperature simultaneously. Type 3281 and Type 3286 Steam-converting Valves (T 8251 EN) Globe valve (Type 3281) or angle valve (Type 3286) according to DIN or ANSI standards. Nominal size DN NPS 2 8 Nominal pressure PN ANSI Class Temperature range Up to 500 C Up to 930 F Type 3284 Steam-converting Valve (T 8254 EN) Globe valve with four-flanged body and double-guided plug stem according to DIN or ANSI standards. W&T Type DUV-C3 Steam-converting Valve (T 9934 EN) Steam-converting valve for power plant engineering and industrial processes. Inlet DN PN Outlet DN PN NPS3 20 Class NPS4 64 ANSI Class Temperature range Up to 560 C Up to 1040 F Valve bodies available in forged steel (A105), heat-resisting forged steel , /A 182 F12 or /A 182 F22. Special features include at least two-staged controlled perforated plug, at least one uncontrolled attenuation plate and an integrated atomizing steam cooler. Nominal size DN NPS 4 16 Nominal pressure PN ANSI Class Temperature range Up to 500 C Up to 930 F Type 3281 Steam-converting Valve Type 3284 Steam-converting Valve W&T Type DUV-C3 Steam-converting Valve 11 T EN

12 Control valve details Valve bodies and styles The valve body, valve bonnet and, in some cases, the bottom flange are subject to internal stress caused by the process medium flowing through the valve. Consequently, the valves must be designed to be sufficiently resistant to mechanical and chemical stress. Under the influence of the operating temperature, the material strength changes. This behavior can be improved by combining certain alloys. For this reason, heat-resisting materials are used at high temperatures ( e.g. according to DIN EN ) and cold-resisting materials are used for cryogenic service. The materials table on page 27 and the AD Specification Sheet W 10 provide a summary. Globe valve (T 8015 EN, T 8060 EN) Globe valves allow easy installation in straight pipelines. For nominal pressures up to PN 40 and nominal sizes up to DN 300, three-flanged bodies of the Series 240 are mainly used. The plug stem is guided in the valve bonnet, and the V-port plug in the screwed-in seat. The ports of the V-port plug are asymmetric in order to suppress any oscillations. Three-way valve (T 8026 EN) Three-way valves are used for mixing or flow-diverting service. Mixing service with Type 3244 Three-way Valve The mode of operation depends on how the two plugs are arranged. The direction of flow is indicated by arrows. Flow-diverting service with Type 3244 Three-way Valve Type 3241 Globe Valve To handle higher load levels and when larger seat diameters are used, the Type 3254 Globe Valve of the Series 250 is provided with an additional plug stem guide in the bottom flange. Angle valve (T 8065 EN) Angle valves are ideally installed when a vertical pipeline and a horizontal pipeline need to be connected. The process medium is only diverted once. Angle valves allow the condensate to be optimally treated, and are practically entirely self draining. In case the process medium is in the flow-to-close direction, wear in the valve outlet can be reduced by the use of an anti-wear sleeve. For process media containing solids, the outlet of the Type 3256 Control Valves can additionally be fitted with a ceramic wear-resistant pipe. Additional plug stem guide in Type 3254 Type 3256 Angle Valve 12 T EN

13 Cryogenic valve (T 8093 EN) Plants that produce liquefied, cryogenic air separation gases, often use vacuum-insulated pipelines to prevent environmental heat being transferred to the medium. The control valves can be integrated in the vacuum jacket by means of a connecting flange. The valve is designed to widely prevent thermal conduction to the effect that the stem remains free of ice. A bellows seal serves as the primary sealing. The jacketed pipeline is evacuated of air and sealed off after installation of the components. The cryogenic extension bonnet of the control valve is often welded to the jacketed pipeline via a flange, meaning considerable work would be involved to remove the valve from the pipeline. However, to make maintenance possible, the internal parts can be accessed via the cryogenic extension bonnet without having to remove the valve from the pipeline. Valve for food processing (T 8048 EN, T 8097 EN) Valves for food processing are angle valves made of stainless steel. The internal surfaces exposed to the process medium are machined to a fine finish or polished. The valve bodies are self-draining and can be cleaned (CIP) or sterilized (SIP) without having to be disassembled. The stem of Type 3249 is sealed by a special diaphragm, preventing bacteria from being trapped. Type 3249 Valve for food processing The Type 3347 Control Valve is available with welding ends, a threaded or a clamp connection according to ISO 2852, and with a steam line connection if higher purity requirements are to be met. Type 3347 with steam line connection Type 3248 Cryogenic Valve Diaphragm valve (T 8031 EN) For viscous or corrosive media possibly containing solids, diaphragm control valves that are free of dead space and without stuffing boxes are an economical solution. The diaphragm may be made of rubber, nitrile, butyl or PTFE. The valve body may additionally be lined with rubber or PTFE. Type 3345 Diaphragm Valve 13 T EN

14 On-off valve (T 8039 EN) The valve for on-off service is used for tight shutoff of liquids, non-flammable gases and steam. As the valve plug is equipped with both a metal sealing and a soft sealing, the leakage flow rate class VI is achieved. Valve bonnets The valve bonnet closes the valve at the top and provides room for the stuffing box and the plug stem guide. The valve bonnet and the yoke of Series 240 Valves are incorporated in one piece. The valve bonnet and the yoke of Series 250 and 280 Valves are bolted together. The NAMUR rib standardized in IEC located on the yoke allows easy, standardized attachment of a positioner or other accessories. The valve bonnet is a pressure-bearing part that is exposed to the process medium, therefore its material is subject to the same design requirements as the valve body. Type 3351 On-off valve Micro-flow valve (T 8091 EN) Micro-flow valves are used for very low flow rates (K V coefficients <1.6 to 10 5 m 3 /h). The parts exposed to the process medium are made of stainless steel All valve parts are made of semi-finished products. As a result, special materials can be used in a particularly cost-effective manner, and the valve covers a wide range of applications. Packing The plug stem is sealed by the packing. Versions with bellows seal or insulating section or when the packing functions as a backup packing use the standard packing. The temperature range of the standard packing is between 10 and 220 C and can be extended when an insulating section is fitted on the valve bonnet. Valve bonnet of Series 240 Valves Other packings can be installed for special applications. Type 3510 Micro-flow Valve Steam-converting valve (T 8251/4 EN) Steam-converting valves are used to reduce the steam pressure and the steam temperature simultaneously. A connecting pipe supplies the spray water to the flow divider St III. At its inner wall, the spray water comes into contact with the steam flow. The steam flow and the entrained water are mixed in the narrow wire mesh of the flow divider. As the supplied spray water does not come into contact with the valve body, neither erosion nor thermal shock occur. The flow divider ensures low-noise and low-vibration operation. Packing forms Standard packing Temperature range C Self-adjusting, spring-loaded V-ring packing made of PTFE-carbon for nominal sizes DN 15 to DN 150. Self-adjusting PTFE-carbon/PTFE-silk packing for nominal sizes DN 200 to DN 500. Suitable for all applications that require a high level of sealing performance, yet requiring hardly any maintenance. Valve bonnet for Series 250 Valves Type 3281Steam-converting Valve 14 T EN

15 Form A Adjustable, cavity-free PTFE-silk/PTFE-carbon packing. Especially suitable for process media that crystallize out or polymerize. Form B Adjustable, cavity-free PTFE-silk/pure PTFE packing. PTFE-silk for nominal sizes DN 200 to DN 500. Suitable for process media that crystallize out or polymerize and in case carbon particles would contaminate the process medium. Form C Adjustable, cavity-free packing made of woven PTFE-silk. Application for all chemicals including hot acids and alkaline solutions. Form D Spring-loaded V-ring packing made of pure PTFE. Suitable for pure process media in case carbon particles would contaminate the process medium. Form H Adjustable high-temperature packing made of graphite and carbon rings. Especially suitable for superheated steam. Form S Spring-loaded V-ring packing made of PTFE-carbon with BAM approval (German Institute for Materials Research and Testing). Suitable for oxygen service (only when BAM-approved lubricant is used). Form W Adjustable, cavity-free packing made of PTFE-graphite thread and carbon for fresh and service water. The carbon bushings serve as wipers. Especially suitable for hard water and any process media that may cause deposits forming on the plug stem. NACE standard Spring-loaded V-ring packing made of PTFE-carbon conforming to NACE standard. Suitable for sour gas/sour water. ADSEAL Spring-loaded V-ring packing made of PTFE-carbon with ADSEAL emergency adjusting function. Packing versions for extended application conditions available on request. Steam line connection The Type 3347 Control Valve can be provided with a valve bonnet including a steam line connection to meet the requirements regarding purity in the food processing and pharmaceutical industries. Steam or a sterilizing liquid flushes the plug stem between the two PTFE V-ring packings to prevent bacteria from being trapped. Steam line connection in Type 3347 Seat and plug trims The design of the seat and the plug determines the K VS coefficient and the characteristic as well as the seat leakage rate of a valve. The drawings show seat-guided V-port plugs with asymmetric ports with metal sealing and soft sealing. Metal sealing Soft sealing The seat, plug, and plug stem are made of stainless steel. In some cases, the trim elements are subject to high stress due to high differential pressures, cavitation, flashing, or in cases where the process media contains solids. In order to increase the service life, seats and plugs with metal sealing can be provided with a Stellite hard facing, and plugs up to DN 100 can be made of solid Stellite. The seats are screwed into place, allowing them to be easily exchanged. They may also be made of other materials. 15 T EN

16 Seat leakage rate The seat leakage rate is determined according to DIN EN 1349 which specifies the maximum amount of the test process medium (gas or water) that may flow through the closed control valve under test conditions. For special applications (e.g. using Type 3241-Gas or Type 3241-Oil) or with shut-off valves (Type 3351), a high leakage rate class can be achieved by using a lapped-in metal or a soft sealing. Table 2 Plug sealing and seat leakage rate Seat/plug sealing Leakage rate class acc. to DIN EN 1349 Seat leakage % of K VS Metal sealing IV 0.01 Lapped-in metal up to DN 80 IV-S Control valves with ceramic trims (T 8071 EN) Control valves with extremely resistant ceramic trims are used when the valve body and the trim are subject to considerable erosion and abrasion. The following valves can be fitted with ceramic trims: Type 3251 Globe Valve, Type 3256 Angle Valve. The Type 3256 Angle Valve can be fitted with a ceramic wear-resistant pipe. When the process medium flows in the flow-to-close (FTC) direction, this version is suitable for extreme erosive and abrasive conditions caused by process medium containing solids. Details on ceramic materials and their properties are available on request. Lapped-in metal in DN 100 or larger IV-S Soft sealing VI 0.3 Δp f L 1) PTFE ring with pressure balancing Graphite ring with pressure balancing IV 0.01 III 0.1 1) Leakage factor f L according to DIN EN 1349 Pressure balancing If the actuator force is not sufficient to handle the differential pressure, pressure-balanced plugs are a good solution. The plug is designed to function as a piston. The upstream pressure p 1 is transferred to the back of the plug via a borehole in the bottom of the plug. The forces acting on the plug are compensated for with exception of the area around the plug stem. Pressure-balanced plugs are additionally sealed with a PTFE ring or a graphite ring. The pressure-balanced components are subject to wear. As a result, the seat leakage rate (see Table 2) and the amount of maintenance needed for these valves increase. Pressure-balanced plugs should not be used, if at all possible, for high-temperature process media or for media that contain solids or crystallize out. In these cases, we recommend to use a more powerful actuator. Type 3256 Angle Valve with ceramic trim and wear-resistant pipe Low-noise operation Flow dividers (T 8081 EN) The flow dividers St I and St III serve to reduce the noise emission of gases and vapors. The process medium reaches its maximum velocity after passing the restriction between seat and plug. Before it starts to create a noise-intensive, turbulent mixing zone, the process medium hits the inner wall of the flow divider. The flow is divided and a low-noise impulse exchange with the surrounding medium takes place. Flow divider St I and St III Plug with pressure balancing The valve-specific correction values for gases and vapors are required for noise calculation according to VDMA 24422, Edition 1989 and DIN EN when flow dividers are used. Refer to the diagrams on page 24 for details. For further details regarding noise calculation, refer to the DIN EN standard or contact us and we will perform these calculations for you. The K VS coefficient of the valve trim is reduced on using a flow divider. The associated data sheets include the K VS I for the flow divider St I and K VS III for the flow divider St III. 16 T EN

17 AC trims (T 8082/3 EN) AC-1 and AC-2 Trims are optimized trims for low-noise pressure letdown of liquids at differential pressures up to 40 bar. The seat is raised and the parabolic plug is additionally guided in the seat. The AC-2 Trim additionally has up to four attenuation plates. Additional components Bellows seal In case, stricter emissions control requirements must be met, e.g. TA-Luft or in vacuum applications, a metal bellows is used to seal the plug stem. The plug stem is additionally sealed with a packing at the top flange. This packing serves as a backup packing. The metal bellows can be monitored for leakage or a sealing medium can be applied by means of a test connection. The bellows seal can be used for valves of Series 240 from 200 to +400 C, and Series 250/280 from 200 to +450 C. AC-1 Trim AC-2 Trim The three-staged AC-3 Trim is used for differential pressures up to 100 bar. Optionally, stellited hard facings or hardened trims are available. Metal bellows seal Insulating section The application range of a standard packing can be extended to an operating temperature of less than 10 C or over +220 C by using an insulating section. Type 3251 with AC-3 Trim Silencer The silencer acts as a fixed restriction that can be installed downstream of the valve with one to five attenuation plates for applications with gases or vapors. The silencer increases the backpressure downstream of the valve which leads to a reduction in the valve outlet velocity and sound pressure level. Insulating section Type 3381 Silencer attached to Type 3241 Valve Sandwich version for mounting between flanges when one attenuation plate is used Body accommodating 2 to 5 attenuation plates that can be flanged onto a valve Extended nominal size of the outlet The temperature ranges of the various valves series are: Series C Long insulating section C Short insulating section Series C Series 280 max C The temperature ranges specified above may be restricted by the materials used as per the pressure-temperature diagram (see Information Sheet T EN). 17 T EN

18 Heating jacket Some process media only flow easily above a certain temperature. Below this temperature they start to solidify or crystallize out. The valve bodies are fitted with a heating jacket to ensure that the process medium remains at a certain temperature and can flow freely. The valve bonnet may also be equipped with a heating jacket when the plug stem is sealed by a bellows seal. Class Types 3241, 3251, 3254, 3281 and 3284 Globe Valves 600 DIN EN 558-2, Series 39 (ISA 75.03) 900 ASME B 16.10, Class 900, column ASME B 16.10, Class 1500, column ASME B Class 2500, column 4 Type 3256 and Type 3286 Angle Valve 125/150 DIN EN 558-2, Series /300 DIN EN 558-2, Series DIN EN 558-2, Series ASME B 16.10, Class 900, column ASME B 16.10, Class 1500, column ASME B 16.10, Class 2500, column 6 Versions with welding-neck ends are not standardized. Consult SAMSON first concerning their face-to-face dimensions.. Type 3241 with heating jacket and with bellows heating A heat transfer medium flowing between valve body and heating jacket ensures that the process medium is kept at a certain temperature. If steam is used as heating transfer medium, proper condensate discharge must be ensured. Versions with connecting flange heating or enlargened connecting flanges for the body are available on request. Face-to-face dimensions SAMSON control valves with flanges have the same face-to-face dimensions as valves with welding ends. The face-to-face dimensions are defined according to DIN EN as follows: Types 3241, 3251, 3254, 3281 and 3284 PN Globe Valves DIN EN 558-1, Series DIN EN 558-1, Series DIN 3202 Part 1 (edition 09.84), Series F2 250 DIN 3202 Part 1 (edition 09.84), Series F3 320 DIN 3202 Part 1 (edition 09.84), Series F3 400 Consistent with ASME B16.10 Class 2500, column 4 Type 3256 and Type 3286 Angle Valves DIN EN 558-1, Series DIN EN 558-1, Series DIN 3202 Part 1 (edition 09.84), Series F x values from DIN 3202 Part (edition 09.84), Series F Consistent with ASME B16.10, Class 2500, column 4 (halved values) ANSI valves with flanges or welding ends Types 3241, 3251, 3254, 3281 and 3284 Class Globe Valves 125/150 DIN EN 558-2, Series 37 (Class 150: ISA 75.03) 250/300 DIN EN 558-2, Series 38 (ISA 75.03) Types of pipe connections Flanged connections are most frequently used in industrial plants as they allow easy mounting and removal of valves and their milled facings provide excellent sealing reliability and quality. A summary of DIN flanges, their connection dimensions and types of flange faces for valves up to PN 100 is provided in DIN EN and , for valves with PN 160 or higher in DIN 2500, DIN 2501, and DIN The standard version of SAMSON valves has flanges with raised faces in Form B1. Other flange forms are available on request. DIN flanges in Form B1 (Raised Face) Form C (Tongue) Form D (Groove) Form E (Male Face) Form F (Female Face) The US standard for flanges is ANSI/ASME B16.1 for Class 125 and ANSI/ASME B16.5 for higher pressure ratings. The standard version of cast iron valves with a pressure rating of Class 125 has flanges with flat faces. Valves with a pressure rating of Class 300 have flanges with raised faces (0.06 height), and valves with higher pressure ratings have flanges with raised faces (0.25 height). Other versions are possible. More details available on request. For critical process media and/or high pressure ratings, the valve bodies can be supplied with welding ends or welding-neck ends. 18 T EN

19 For control valves according to DIN standards, the welding ends conform to EN For control valves according to US standards, the welding ends are specified in ASME/ANSI B For installation methods according to US standards, valves of the Series 240 are available with NPT female thread in sizes ½ to 2. Valve-specific parameters K VS coefficient The necessary K V coefficient is calculated according to DIN EN from the specified operating data. The K VS coefficient is specified in the data sheets to identify the valves. It corresponds to the K V coefficient at the rated travel H 100. In order to increase control accuracy and with regard to manufacturing tolerances, the selected K VS coefficient must be higher than the K V coefficient. Inherent characteristic The characteristic shows the relationship between the K V flow coefficient and the travel (H). Control valves are either designed with an equal percentage (2) or with a linear (1) characteristic. The equal percentage characteristic can be identified by equal increments of travel that yield equal percentage increments of the K V flow coefficient. Whereas, in a linear characteristic, equal increments of travel yield equal increments of the K V flow coefficient. Rangeability The rangeability is the quotient of K VS /K VR. K VR being the smallest K V where the characteristic still lies within the permissible gradient tolerance of the characteristic (DIN EN Part 2-4). Valve characteristic: 1- linear, 2 - equal percentage 19 T EN

20 Actuators Actuators convert the control signal issued, for example, by a positioner into a travel motion carried out by the control valve (plug stem with valve plug). We supply pneumatic, electric and electrohydraulic actuators as well as hand-operated actuators (see Information Sheet T 8300 EN). Type 3277 Pneumatic Actuator Pneumatic actuators These are used for pneumatic or electropneumatic control equipment. Pneumatic actuators are diaphragm actuators with a rolling diaphragm and internally fitted springs. The benefits of pneumatic actuators include their low overall height, strong positioning force and fast response. Different signal pressure ranges are available. Pneumatic actuators are suitable for use in hazardous areas as well as featuring a fail-safe action: Upon air supply failure, the control valve is either closed or opened. The Type 3277 Pneumatic Actuators allow direct attachment of positioners or limit switches. This prevent the travel linkage from being misaligned as it is located within the yoke below the actuator housing. Pneumatic actuators can additionally be equipped with a handwheel (see T EN and T EN). Type 3271 Pneumatic Actuator with additional handwheel Type 3275 Pneumatic Piston Actuator Electric actuators If compressed air is not available, electric actuators with strong positioning forces and large travels may be used. These actuators are self-locking. Electric actuators are connected to three-point stepping controllers, electric positioners issuing analog signals or over a reversing contactor unit (see T 8330 EN). Type 3374 Electric Actuator Electrohydraulic actuators These actuators are connected to an analog signal via three-point stepping controllers or electric positioners. Versions with fail-safe action are available (see T 8340 EN). Hand-operated actuators They are attached to Series 240 and 250 Control Valves which are used as hand-operated control valves with rated travels of 15 or 30 mm (see T 8312 EN). Hand-operated actuators with larger travels are available on request (Type /6). Type SAM Electric Actuator with manual override Type 3274 Electrohydraulic Actuator Type 3273 Hand-operated Actuator 20 T EN

21 Accessories for control valves SAMSON control valves can be equipped with several additional accessories. These accessories are, for example, used for actuator control and travel indication. They are attached either according to IEC (NAMUR rib) or directly in conjunction with the Type 3277 Pneumatic Actuator (see T EN). For direct attachment, the entire travel linkage is located in a closed housing in order to prevent contamination, misalignment as well as personal injury (see Information Sheet T 8350 EN for details). Positioners Positioners (p/p or i/p) compare the signal of pneumatic or electric control equipment to the travel (manipulated variable) of the control valve. They issue a pneumatic signal pressure as the output variable. The positioners can be used in standard operation or in split-range operation (see T 8351 EN ff.). Positioners from the Series 3730 include an integrated firmware for valve diagnostics which issue alerts for predictive maintenance action (EXPERT and EXPERT +, see T 8388 EN). Smart versions (HART, PROFIBUS-PA, FOUNDATION Fieldbus) are configured and operated using a PC or handheld terminal (see T 8380/-82/-83/-84 EN). SAMSON s own TROVIS-VIEW software serves as a standard operator interface to operate these smart positioners (see T 6661 EN). Limit switch, position transmitter or potentiometer Type Positioner Solenoid valve Limit switches Whenever an adjustable limit value is exceeded or not reached, a signal is issued. Inductive limit switches are frequently used. However, versions with electric or pneumatic microswitches are also available (see Information Sheet T 8350 EN). Position transmitter/potentiometer To indicate the travel position of a control valve, the rated travel range is represented by an analog electric signal (see T 8363 EN). Solenoid valves The binary signals from control equipment are converted into binary pneumatic control signals. As a result, the control valve can quickly be brought into its final position. The solenoid valves are used for on-off valves or for control valves with fail-safe position (e.g. Type 3241 typetested, T 8016 EN; T 3701 EN). Lock-up valve Pneumatic remote adjuster Lock-up valve If the supply air pressure falls below an adjusted value, the signal pressure line is shut off. When this happens, the actuator stops in its last position (see T 8391 EN). Pneumatic remote adjuster Manually adjustable precision regulator for the set point adjustment of pneumatic control equipment. Supply pressure regulators Supply pressure regulators provide pneumatic control valves with a constant air pressure (adjustable between 0 and 6 bar) (see T 8546 EN). Supply pressure regulator with air filter They consist of a supply pressure regulator and an air filter holding back foreign particles, oil and/or condensate (see T 8546 EN). Supply pressure regulator without and with air filter Pneumatic volume booster The actuating time can be made shorter for fast control loops by using pneumatic volume boosters. 21 T EN

22 Valve sizing Calculating the K V coefficient The K V coefficient is calculated according to DIN EN The data sheets contain the necessary device-specific specifications. A preliminary, simplified calculation may be made with the help of the working equations listed below. They do not take into account the influence of the connecting fittings or choked flow at critical flow velocities. Selecting the valve After calculating the K V coefficient, the corresponding K VS coefficient of the valve type in question is selected from the data sheet. In case, real operating data are used in the calculation, the following generally applies: K vmax 0.7 to 0.8 K VS. p 1 Pressure upstream of the valve p 2 Pressure downstream of the valve H Travel Q Flow rate in m 3 /h W Flow rate in kg/h ρ Density in kg/m 3 (generally also with liquids) ρ 1 Upstream density in kg/m 3 (with gases and vapors) t 1 Temperature in C upstream of the valve Medium Liquids Gases Steam Pressure drops m 3 /h kg/h m 3 /h kg/h kg/h p 2 > p1 2 Δp < p1 2 p 2 < p1 2 Δp > p1 2 K V = Q ρ 1000 Δp K V = W 1000 ρδp K V = QG 519 ρg T1 Δpp2 K V = W 519 ρg QG W K V = ρg T1 K p V = p1 T1 Δpp T ρ 1 G 2 K V = W K V = W v 2 Δp 2v * p1 Including: p 1 [bar] Absolute pressure p abs p 2 [bar] Absolute pressure p abs Δp [bar] Absolute pressure p abs T 1 [K] t 1 Q G [m 3 /h] Flow rate of gas, based on 0 C and 1013 mbar ρ [kg/m 3 ] Density of liquids ρ G [kg/m 3 ] Density of gases at 0 C and 1013 mbar v 1 [m 3 /kg] Specific volume (v from steam table) for p 1 and t 1 v 2 [m 3 /kg] Specific volume (v from steam table) for p 2 and t 1 v* [m 3 /kg] Specific volume (v from steam table) for p1 2 and t1 22 T EN