Series 240 Types PSA, -7 PSA, -9 PSA Pneumatic Control Valves Type 3241 PSA Globe Valve

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1 Series 240 Types PSA, -7 PSA, -9 PSA Pneumatic Control Valves Type 3241 PSA Globe Valve ANSI version Application Control valves for PSA plants (Pressure Swing Adsorption) s NPS ½ to 6 Pressure rating Class 150 to 300 Temperatures 20 to 430 F ( 29 to +220 C) Standards ANSI, ASME and ASTM 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 stainless steel according to ASTM specifications Forged steel or forged stainless steel Cast stainless steel Undivided valve bonnet Valve plug Soft seal or 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 EN for more details. Versions Standard version for temperatures ranging from 20 to 430 F ( 29 to 220 C) Type PSA (Fig. 1) NPS ½ to 3 with Type 3271 Actuator (see Data Sheet u T EN) Type PSA (Fig. 2 and Fig. 4) NPS ½ to 3, valve in forged steel up to NPS 3, with Type 3277 Actuator for integral positioner attachment (u T EN) Type PSA (Fig. 3) NPS ½ to 6, with Type 3275 Piston Actuator (u T 8314 EN), for integral attachment of a positioner and/or limit switch Further versions Flow divider for noise reduction in both directions of flow DIN version See Data Sheet u T EN Versions with dimensions according to Japanese Industry Standard (JIS) Details on request Fig. 1: Type PSA NPS ½ to 3 Fig. 3: Type PSA NPS ½ to 6 Fig. 2: Type PSA NPS ½ to 3 Fig. 4: Type PSA, NPS ½ to 3 forged steel body Associated Information Sheet Associated Data Sheets for pneumatic actuators T 8000 EN T EN, T 8314 EN Edition October 2013 Data Sheet T EN

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 EN), 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 EN). 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 (60 psi) for valves in sizes NPS ½ to 2 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. 6: Type PSA Control Valve, NPS ½ to 6 with Type 3275 Pneumatic Piston Actuator Fig. 5: Type 3241 PSA Valve, NPS ½ to 6 with flow divider St I PSA Fig. 7: Type PSA Valve in forged steel, NPS ½ to 3 2 T EN

3 Table 1: Technical data for Type 3241 PSA Valve NPS ½ to 6 ½, 1, 1½, 2, 3 ½ to 6 ½, 1, 1½, 2, 3 ASTM material A216 WCC A105 A351 CF8M A182 F316 Type of end connections Flange Flange Flange Flange Flange type RF 1) RF 1) RF 1) RF 1) Pressure rating (ANSI Class) 150/ / Seat/plug seal Soft seal or high-performance metal seal Characteristic Equal percentage or linear Rangeability 50:1 for NPS ½ to 2 30:1 for NPS 2½ to 6 Temperature ranges in C ( F) Permissible operating pressures acc. to pressure-temperature diagram (see Information Sheet T EN) Valve 29 to 220 C ( 20 to 430 F) Leakage class according to ANSI/FCI 70-2 Valve plug Soft seal VI High-performance metal seal V 1) Other versions on request Table 2: Materials Standard version Valve body 1) Cast steel A216 WCC Forged steel A105 Cast stainless steel A351 CF8M Forged stainless steel A182 F316 Valve bonnet A105 A105 A182 F316 A182 F316 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) Refer to pressure-temperature diagram, other materials available on request T EN 3

4 Table 3: C V and K VS coefficients Table 3.1: Overview (with flow divider St I PSA (C V I, K VS I)) C V K VS C V I K VS I Seat ØD Travel in mm in mm Table 3.2: Versions without flow divider C V K VS NPS/DN ½ 15 ¾ ½ ½ Table 3.3: Versions with flow divider St I PSA (C V I, K VS I) Versions with cast bodies only C V I K VS I NPS/DN ½ 15 ¾ ½ ½ Terms for control valve sizing according to IEC 60534, Parts 2-1 and 2-2: F L = 0.95, X T = 0.75 Conversion of flow coefficients: C V (US gallons/min.) = K V (m³/h)/ T EN

5 Table 4: Differential pressure tables for Type 3271 and Type 3277 Actuators with Type 3241 PSA Valve 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 Pressures in bar Bench range (bar) with actuator 240 cm² 120 cm² 350 cm² 700 cm² 0.2 to to to to to to 3.0 1) 1.4 to to 1.2 (1.2 to 2.0) 0.8 to 2.4 (1.8 to 3.0) 2.1 to to 3.6 (1.85 to (2.7 to 3.3) 2.3) Required supply pressure (bar) NPS ½ to 1 ¾ to 1½ C V Actuator cm² Δp when p 2 = 0 bar and ½ to 2½ 30 2 to (50) (50) (50) (50) (50) (50) (50) 2½ and (23) (35) (36) (50) (21) (22) (33) 1) Not for actuator with 120 cm² (18.6 in²) diaphragm area T EN 5

6 Table 4.2: Fail-close valve Pressures in psi Bench range (psi) with actuator 240 cm² 120 cm² 350 cm² 700 cm² 3 to 15 4 to 17 9 to to 48 6 to 30 9 to 44 1) 6 to 18 (18 to 30) 12 to 35 (26 to 44) 20 to to to 52 (26 to 34) (39 to 50) Required supply pressure (psi) NPS 1½ to 1 ¾ to 1½ C V Actuator cm² Δp when p 2 = 0 psi ½ and ½ to to 2½ (725) (725) (725) (725) (725) (725) (725) 2½ and (333) (507) (520) (725) (305) (320) (475) 1) Not for actuator with 120 cm² (18.6 in²) diaphragm area 6 T EN

7 Table 4.3: Fail-open valve Pressures in bar Table 4.4: Fail-open valve Pressures in psi Valve closed with required signal pressure Bench range (bar/ psi) with actuator (cm²) Required supply pressure (bar/psi) NPS ½ to 1 ¾ to 1½ C V Table 4.3 Pressures in bar Table 4.4 Pressures in psi 120 to to to 15 Actuator cm² Δp when p 2 = 0 bar Δp when p 2 = 0 psi ½ and ½ to to 2½ 47 2½ and T EN 7

8 Table 5: Permissible differential pressures for Type 3275 Piston Actuator with Type 3241 PSA Valve Table 5.1: Type PSA Valve, plug with high-performance metal seal Pressures in bar NPS Flow coefficient C V Actuator cm² Supply pressure [bar] ¾ to 1½ 7.5 to ½ to ½ to to T EN

9 Table 5.2: Type PSA Valve, plug with high-performance metal seal Pressures in psi NPS Flow coefficient C V Actuator cm² Supply pressure [psi] ¾ to 1½ 7.5 to ½ to ½ to to T EN 9

10 Table 6: Permissible differential pressures for Type PSA Control Valve Table 6.1: Type PSA Valve with soft-seated plug Pressures in bar NPS Flow coefficient C V Actuator cm² Supply pressure [bar] ¾ to 1½ 7.5 to ½ to ½ to to T EN

11 Table 6.2: Type PSA Valve with soft-seated plug Pressures in psi NPS Flow coefficient C V Actuator cm² Supply pressure [psi] ¾ to 1½ 7.5 to ½ to ½ to to T EN 11

12 Table 7: Dimensions for Type PSA, Type PSA and Type PSA in standard version Valve Length L H1 H2 (approx.) Class 150 RF Class 300 RF 700 cm² and Type 3275 H2 Forged steel version (approx.) NPS ½ ¾ 1 1½ 2 2½ DN in mm in mm in mm ) 260 1) 350 1) 390 1) in mm in mm Actuator Type 3271/3277 Type 3275 Effective area cm² in² Diaphragm ØD/ D in mm H in mm H3 2) in mm H5 in mm Thread M30x1.5 M30x1.5 M30x1.5 M30x1.5 M30x1.5 M60x1.5 a (for Type 3271/3275 Actuator) G 1 /8 ( 1 /8 NPT) G 3 /8 ( 3 /8 NPT) G 3 /8 ( 3 /8 NPT) G 3 /8 G ½ G ½ a2 (for Type 3277 Actuator) G 3 /8 ( 3 /8 NPT) G 3 /8 ( 3 /8 NPT) 1) Add 65 mm to H1 when a Type 3275 Actuator with 804 cm² actuator area is mounted. 2) Minimum clearance to remove the actuator Dimensions Type 3271 Actuator Type 3277 Actuator Type 3275 Actuator 314/490 cm² Type 3275 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 NPS ½ to 3 Type PSA NPS ½ to 3 Type PSA NPS ½ to 6 Type PSA NPS 4 to 6 12 T EN

13 Table 8: Weights for Type PSA, Type PSA and Type PSA Valve Weight without actuator NPS ½ ¾ 1 1½ 2 2½ DN lbs kg Actuator Type 3271 Type 3277 Type 3275 Effective area cm² in² Weight, approx. lbs kg Ordering text Globe valve Type 3241 PSA NPS Class... Body material According to Table 2 Type of end Flanges (RF or FF) or NPT thread connections Seat and plug Soft seal or high-performance metal seal Characteristic Equal percentage or linear Pneumatic actuator Type 3271, Type 3277 or Type 3275 Fail-safe position Fail-close or fail-open Process medium Density in lb/cu.ft or kg/m³ and temperature in F or C Flow rate lbs/h or kg/h or cu.ft/min or m³/h in standard or operating state Pressure p 1 or p 2 in bar or psi (absolute pressure) with minimum, normal and maximum flow rate Valve accessories Positioner and/or limit switch T EN 13

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16 Specifications subject to change without notice SAMSON AG MESS- UND REGELTECHNIK Weismüllerstraße Frankfurt am Main, Germany Phone: Fax: samson@samson.de T EN English