Data Sheet T EN

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1 Data Sheet T EN Series 240 Types PSA, -7 PSA, -9 PSA Pneumatic Control Valves Type 3241 PSA Globe Valve Application Control valves for PSA plants (Pressure Swing Adsorption) Valve sizes DN 15 to 150 Nominal pressure PN 10 to 40 Medium temperatures 10 to +220 C Type 3241 Globe Valve operated with Type 3271 Pneumatic Actuator (Type Control Valve) Type 3277 Pneumatic Actuator (Type Control Valve) for integral positioner attachment Type 3275 Pneumatic Piston Actuator (Type Control Valve) Valve body made of Cast steel Cast stainless steel or cast cold-resisting steel Forged steel Forged stainless steel Undivided valve bonnet Valve plug Soft seal High-performance metal seal The control valves, designed according to the modular assembly principle, can be equipped with various accessories: Positioners, solenoid valves and other accessories according to IEC and NAMUR recommendation. Refer to Information Sheet u T 8350 for more details. Versions Standard version for medium temperatures ranging from 10 to +220 C Type PSA (Fig. 1) DN 15 to 80 with Type 3271 Actuator (see Data Sheet u T ) Type PSA (Fig. 2) DN 15 to 80 with Type 3277 Actuator (see Data Sheet u T ) Type PSA (Fig. 3) DN 15 to 150, with Type 3275 Piston Actuator (u T 8314) for integral attachment of a positioner and/or limit switch Further versions Flow divider For cast valves for noise reduction in both directions of flow Fig. 2: Type PSA, DN 15 to 80, forged steel Fig. 1: Type PSA, DN 15 to 80 Fig. 3: Type PSA, DN 15 to 150 ANSI version See Data Sheet u T Versions with dimensions according to Japanese Industry Standard (JIS) Details on request SAMSON AKTIENGESELLSCHAFT Weismüllerstraße Frankfurt am Main, Germany Phone: Fax: samson@samson.de Edition October 2016

2 Principle of operation The process medium flows through the valve in both directions. The valve plug position determines the cross-sectional area between the seat and plug. Fail-safe position Depending on how the springs are arranged in the Type 3271 or Type 3277 Actuator (u T ), the valve has two different fail-safe positions effective upon air supply failure: Actuator stem extends (fail-close) The valve closes when the supply air fails. Actuator stem retracts (fail-open) The valve opens when the supply air fails. The double-acting Type 3275 Piston Actuator does not have a fail-safe action (see u T 8314). Notes on the differential pressure tables The differential pressure tables have been prepared under the following conditions: The maximum permissible supply pressure is 4 bar for valves in sizes DN 15 to 50 and actuators with an effective diaphragm area of 700 cm² Process medium in flow-to-open direction Version with PTFE packing The leakage rates specified in Table 1 are not exceeded with the maximum differential pressures specified. The specified differential pressure may be restricted by the pressure-temperature diagram. Fig. 5: Type PSA Control Valve, DN 15 to 150, with Type 3275 Pneumatic Piston Actuator Fig. 4: Type 3241 PSA Valve, DN 15 to 150, with flow divider St I PSA Fig. 6: Type PSA Valve in forged steel, DN 15 to 80 2 T EN

3 Table 1: Technical data for Type 3241 PSA Valve Valve size DN 15 to , 25, 40, 50, 80 Material Type of end connections Cast steel GP240GH Cast stainless steel Forged steel P250GH Flange (all DIN versions) Nominal pressure PN 10, 16, 25, 40 Seat/plug seal Characteristic Rangeability Compliance Soft seal or high-performance metal seal Equal percentage or linear 50:1 for DN 15 to 50 30:1 for DN 65 and larger Forged stainless steel Medium temperature ranges in C Permissible operating pressures acc. to pressure-temperature diagram (see Information Sheet u T ) Valve 10 to +220 C Leakage class according to IEC Valve plug Soft seal VI High-performance metal seal V Table 2: Materials Standard version Nominal pressure PN 16 to 40 Valve body 1) Cast steel GP240GH Cast stainless steel Forged steel P250GH Forged stainless steel Valve bonnet / Seat and plug Seal ring for soft-seated plug: PTFE with glass fiber Guide bushings Packing V-ring packing: PTFE with carbon Spring: Stem protective ring Body gasket Graphite on metal core 1) Special materials on request T EN 3

4 Table 3: K VS coefficients Terms for control valve sizing according to IEC 60534, Parts 2-1 and 2-2: F L = 0.95, X T = 0.75 Table 3.1: Overview with flow divider St I PSA (K VS I) K VS K VS I Seat Ø mm Travel mm Table 3.2: Versions without flow divider K VS Nominal size DN Table 3.3: Versions with flow divider St I PSA (K VS I) Versions with cast bodies only K VS I Nominal size DN T EN

5 Table 4: Differential pressure tables for Type 3271 and Type 3277 Actuators with Type 3241 PSA Valve All pressures in bar Permissible differential pressures Δp for unbalanced plug with high-performance metal seal when p 2 = 0 Values specified in the gray-shaded columns correspond to the standard application cases, i.e. operation with rated travel Differential pressures specified in the white columns apply to maximum pretensioned springs Values in parentheses are valid for 50 % travel. Table 4.1: Fail-close valve Valve closed with 0 bar signal pressure 240 cm² 0.3 to to to 3.3 Bench range with 120 cm² 0.4 to to 3.0 actuator 350 cm² 0.2 to cm² 0.4 to to to to to cm² (1.2 to 2.0) (1.8 to 3.0) (1.85 to 2.3) (2.7 to 3.3) Required supply pressure Valve size DN 15 to to 40 K VS to to to Actuator cm² Δp when p 2 = 0 bar (40) (40) (40) (40) (40) (40) (40) (23) (35) (36) (40) (14) (21) (22) (33) Table 4.2: Fail-open valve Valve closed with the required signal pressure 240 cm² Bench range with 120 cm² actuator 350 cm² 0.2 to cm² Required supply pressure Valve size DN 15 to to 40 K VS to to to Actuator cm² Δp when p 2 = 0 bar T EN 5

6 Table 5: Permissible differential pressure for Type 3275 Piston Actuator with Type 3241 PSA Valve Table 5.1: Plug with high-performance metal seal Pressures in bar Valve size DN Flow coefficient K VS Actuator cm² Supply pressure [bar] to to to to to to T EN

7 Table 5.2: Soft-seated plug Pressures in bar Valve size DN Flow coefficient K VS Actuator cm² Supply pressure [bar] to to to to to to T EN 7

8 Table 6: Dimensions for Type PSA, Type PSA and Type PSA in standard version Table 6.1: Type 3241 PSA Valve Valve DN Length L mm H1 for actuator mm ) 330 1) 354 1) 363 1) 390 1) H2 for version Cast steel mm Forged steel mm ) Add 65 mm to H1 when a Type 3275 Actuator with 804 cm² actuator area is mounted. Table 6.2: Type 3271 and Type 3277 Pneumatic Actuators Actuator area cm² Diaphragm ØD mm H 1) mm H3 2) mm H5 Type 3277 mm Thread Type 3271 M30 x 1.5 Type 3277 M30 x 1.5 a Type 3271 G 1 /8 ( 1 /8 NPT) G 3 /8 ( 3 /8 NPT) G 3 /8 ( 3 /8 NPT) a2 Type 3277 G 3 /8 G 3 /8 1) Height with welded-on lifting eyelet or height of eyebolt according to DIN 580. Height of the swivel lifting hook may differ. Actuators up to 350 cm² without lifting eyelet 2) Minimum clearance required to remove the actuator Table 6.3: Type 3275 Piston Actuator Actuator area cm² Diaphragm D mm H mm 225 1) 250 1) 286 H3 2) mm H5 mm 101 Thread M30x1.5 M60x1.5 1) Different dimensions are possible for special version (e.g. for low temperatures). 2) Minimum clearance to remove the actuator Table 7: Weights for Type PSA, Type PSA and Type PSA Table 7.1: Type 3241 PSA Valve Valve DN Weight without actuator kg Table 7.2: Type 3271, Type 3277, and Type 3725 Actuators Actuator Type 3271 Type 3277 Type 3275 Actuator area cm² Weight, approx. kg T EN

9 Dimensional drawings Type 3271 Actuator Type 3277 Actuator Type 3275 Piston Actuator 314/490 cm² Type 3275 Piston Actuator, 804 cm² H3 ØD a H3 D H3 ØD a H H H3 D H a2 H5 H5 H H1 H1 H1 H1 H2 H2 H2 H2 L L L L Type PSA DN 15 to 80 Type PSA DN 15 to 80 Type PSA DN 15 to 150 Type PSA DN 100 to 150 T EN 9

10 Ordering text Globe valve Type 3241 PSA Valve size DN Nominal pressure PN Body material According to Table 2 Type of end Flanges connections Seat/plug seal Soft seal or high-performance metal seal Characteristic Equal percentage or linear Actuator Type 3271, Type 3277 or Type 3275 according to Data Sheet u T or u T 8314 Fail-safe position Fail-close or fail-open Process medium Density in kg/m³ and temperature in C Flow rate in kg/h or m³/h in standard or operating state Pressure p 1 and p 2 in bar (absolute pressure p abs ), with minimum, normal and maximum flow rate Valve accessories Positioner and/or limit switch 10 T EN

11 T EN 11

12 Specifications subject to change without notice T EN English

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