Maxifluss Rotary Plug Valve. VETEC-Type 72.1/AT, Type 72.3/AT and Type 72.4/AT

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1 Maxifluss Rotary Plug Valve VETEC-Type 72.1/AT, Type 72.3/AT and Type 72.4/AT Application Double eccentric control valve for process engineering and plants with industrial requirements Nominal size DN 25 to to 8 Nominal pressure PN 10 to 40 ANSI Class 150 and 300 Temperatures 10 C to 400 C 14 F to 752 F Maxifluss Rotary Plug Valve Type 72.1, 72.3 and 72.4 with Single acting Pfeiffer AT Type SRP Rotary Actuator Valve body material Cast steel or Cast stainless steel Seat with Metal sealing or Soft sealing The control valves can be equipped with various accessories: positioners, solenoid valves and other components acc. to VDI/VDE Versions Standard version for temperatures from 10 C to 400 C (14 F to 752 F) Type 72.4/AT 1 to 8 in flangeless design, face to face dimensions acc. to EN 558-1/2 with single acting Type SRP Rotary Actuator Type 72.4/AT DN 25 to DN 200 in flangeless design, face to face dimensions acc. to EN 558-1/2 with single acting Type SRP Rotary Actuator Type 72.1/AT 1 to 8 in flanged design, face to face dimensions acc. to ANSI B16.10 with single acting Type SRP Rotary Actuator Type 72.3/AT DN 25 to DN 200 in flanged design, face to face dimensions acc. to DIN 3202 F1/EN 558 Series 1 with single acting Type SRP Rotary Actuator Fig. 1 VETEC Type 72.4/AT Maxifluss Rotary Plug Valve Flangeless design acc. to ANSI or DIN Further versions with "TA-Luft" (German clean air act) packing Noise-reducing countermeasures Double acting Type DAP Actuator Heating jacket for flange valves Fig. 2 Type 72.1/AT acc. to ANSI or Type 72.3/AT acc. to DIN in flanged design Edition April 2000 Data Sheet

2 Principle of operation The Maxifluss double offset eccentric plug rotates into the seat at an angle that eliminates sliding over the seat surface. This double eccentric design causes the plug to lift away and clear the seat immediately as it starts to rotate without any breakaway torque when the plug shaft is turned from the closed into the open position. The valve opens smoothly and therefore shows a stable control response at small opening angles. The process medium can flow through the valve in either direction. The standard direction of flow is for Liquids = flow to open (direction of flow "V"), Gases and vapors = flow to close (direction of flow "H"). The flow coefficient is determined by the opening angle of the plug. The inherent characteristic of the Maxifluss Rotary Plug Valves can be converted into a linear or equal percentage characteristic using positioners and cam discs. Fail-safe position Attached to the Pfeiffer AT Type SRP Rotary Plug Valve, the control valve has two fail-safe positions which become effective when the piston is relieved of pressure as well as when the supply air fails: "Valve CLOSED without supply air", the Maxifluss Rotary Plug Valve is closed when the supply air fails. "Valve OPEN without supply air", the Maxifluss Rotary Plug Valve is opened when the supply air fails. "H" => <= "V" Fig. 3 Sectional diagram of VETEC Type 72.4/AT in flangeless design Table 1 Technical data Nominal size DN 25 to to 8 Maxifluss Type Body style Flangeless Flanged Flangeless Flanged Nominal pressure PN 10 to PN 40 ANSI Class 150 and 300 Face to face dimensions IEC 534 Part 3-2 EN 558-1/2, Series 36 DIN 3202 F1 EN 558-1, Series 1 IEC 534 Part 3-2 EN 558-1/2, Series 36 Flange bore acc. to PN 10, 16, 25 or 40 ANSI Class 150 or 300 Seat ring Metal sealing PTFE soft sealing (direction of flow: flow to close) Characteristic Equal percentage or linear (using cam disc in the positioner) Rangeability 200 : 1 Temperature range with metal sealing 10 to 400 C (14 to 752 F) with soft sealing 10 to 220 C (14 to 428 F) Leakage class acc. to IEC 534 Part 4 with metal sealing IV-L1 with soft sealing VI-G1 ANSI B16.10 EN 558-2, Series 37 for Class 150, Series 38 for Class 300 2

3 Table 2 Materials (WN = Material Number according to DIN) Body WN WN Seat WN (WN /optionally Stellite 6) Plug WN (WN /optionally Stellite 6) Shaft WN Packing PTFE/Graphite Gaskets Graphite/Stainless steel Terms for control valve sizing and noise level calculation Table 3a K vs, C v and z values Seat with metal sealing, direction of flow "V", flow to open For direction of flow "H", flow to close, the K vs values are reduced by 20 % Nominal size DN 25/1 40/ /2 80/3 100/4 150/6 200/8 Kvs % Kvs Cv Seat z Kvs % Kvs Cv Seat z Kvs % Kvs Cv Seat z Kvs % Kvs Cv Seat z Table 3b K vs and C v values Seat with soft sealing, direction of flow "flow to close" Nominal size DN 25/1 40/ /2 80/3 100/4 150/6 200/8 Kvs % Kvs Cv Seat z Kvs % Kvs Cv Seat z Kvs % Kvs Cv Seat z Kvs % Kvs Cv Seat z Table 3c F L and x T values Nominal size DN 25/1 40/ /2 80/3 100/4 150/6 200/8 100 % Kvs FL xt % Kvs FL xt % Kvs FL xt % Kvs FL xt

4 Permissible differential pressures Table 4a Fail-safe position: valve CLOSED Pressures in bar Permissible differential pressure for CLOSED position Standard flow Reversed flow Nominal size Required "flow to open" "flow to close" Shaft Type SRP Springs supply in mm Actuator n= Metal or soft sealing with a mm in pressure Metal sealing supply pressure of 3 bar 4 bar 5 bar 5.5 bar Max. perm. supply pressure

5 Permissible differential pressures Table 4b Fail-safe position: valve OPEN Pressures in bar Reversed flow Nominal size Required Shaft Type SRP Springs "flow to close" supply in mm Actuator n mm in pressure Metal/soft sealing Permissible differential pressure for OPEN position Standard flow "flow to open" Metal sealing with a supply pressure of 3 bar 4 bar 5 bar 5.5 bar Max. perm supply pressure

6 Table 5 Permissible shaft and actuator torque for both directions of flow DN Perm. shaft torque in Nm at Required actuator torque in Nm at a differential pressure of mm in 20 C (71 F) 400 C (752 F) 5 bar 10 bar 15 bar 20 bar 25 bar 30 bar 35 bar 40 bar Table 6 Dimensions in mm and weights Valve DN 25/1 40/ /2 80/3 100/4 150/6 200/8 Length L Type 72.1 Cl Type 72.1 Cl Type 72.3 PN 10/ Type Shaft d mm B mm A mm Flange DIN 3337 F07/F07 F05/F07 F05/F07 F07/F10 F07/F10/F12 F10/F12/F14 F10/F12/F14 SW mm 14 14/17 14/17 17/22 17/22/27 22/27/36 22/27/36 Weight approx. kg Type Type Type Type SRP Rotary Actuator C mm H3 mm E mm Connecting flange DIN 3337 F05 F07 F07 F10 F10 F12 F14 SW mm Weight Type SRP approx. kg Type 3767 Positioner F mm

7 Flangeless verison Flanged version Fig. 4 Dimension diagram of VETEC Type 72.4/AT Following details are required on ordering: Type Acc. to Table 1 Nominal size DN... Nominal pressure PN... Body material Acc. to Table 2 Type of seat With metal sealing or soft sealing Characteristic Equal percentage or linear K vs/c v value Acc. to Table 3 Direction of flow Standard (flow to open = V) or reversed ( flow to close = H) Actuator Type SRP... Fail-safe position Valve CLOSED or OPEN Max. differential pressure for... [bar] actuator Supply air... [bar] Operating range Number of springs Others Accessories, special versions, certificates, inspection reports, etc. Specifications subject to change without notice. 7

8 SAMSON AG MESS- UND REGELTECHNIK Weismüllerstraße 3 D Frankfurt am Main Telefon (0 69) Telefax (0 69) Internet:

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