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 200 1 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 3845. 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
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 200 1 to 8 Maxifluss Type 72.4 72.3 72.4 72.1 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
Table 2 Materials (WN = Material Number according to DIN) Body WN 1.0619 WN 1.4581 Seat WN 1.4571 (WN 1.4571/optionally Stellite 6) Plug WN 1.4581 (WN 1.4581/optionally Stellite 6) Shaft WN 1.4571 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 40/1 1 2 50/2 80/3 100/4 150/6 200/8 Kvs 16 40 80 245 370 685 950 100 % Kvs Cv 19 47 94 286 430 800 1110 Seat 18 26 36 60 76 105 135 z 0.75 0.3 0.3 0.25 0.2 0.2 0.2 0.2 Kvs 10 24 48 147 220 410 570 60 % Kvs Cv 12 28 56 171 256 477 663 Seat 16 21.5 29.5 50 60 86 106 z 0.75 0.34 0.34 0.3 0.25 0.25 0.25 0.22 Kvs 6 16 33 105 150 275 380 40 % Kvs Cv 7 19 38 122 174 320 442 Seat 14 18.5 25.5 44 53 73 88 z 0.75 0.39 0.39 0.34 0.30 0.30 0.30 0.24 Kvs 4 12 20 63 93 179 240 25 % Kvs Cv 5 14 23 73 108 208 279 Seat 10 16 21 37 45 62 73 z 0.75 0.39 0.39 0.34 0.30 0.30 0.30 0.24 Table 3b K vs and C v values Seat with soft sealing, direction of flow "flow to close" Nominal size DN 25/1 40/1 1 2 50/2 80/3 100/4 150/6 200/8 Kvs 10 40 68 162 252 510 726 100 % Kvs Cv 12 47 79 189 295 593 849 Seat 16 26 35 54 70 99 129 z 0.75 0.3 0.3 0.25 0.2 0.2 0.2 0.2 Kvs 6 21 41 135 164 270 460 60 % Kvs Cv 7 24 50 158 191 314 535 Seat 15 21.5 29.5 50 60 86 106 z 0.75 0.34 0.34 0.3 0.25 0.25 0.25 0.22 Kvs 4 15 28 105 121 182 300 40 % Kvs Cv 5 17 33 123 141 212 349 Seat 14 18.5 25.5 46 53 73 88 z 0.75 0.39 0.39 0.34 0.3 0.3 0.3 0.24 Kvs 2 11 17 56 72 132 200 25 % Kvs Cv 3 13 20 65 84 153 233 Seat 10 16 21 37 45 62 73 z 0.75 0.43 0.43 0.38 0.35 0.35 0.35 0.26 Table 3c F L and x T values Nominal size DN 25/1 40/1 1 2 50/2 80/3 100/4 150/6 200/8 100 % Kvs FL 0.67 0.67 0.59 0.51 0.51 0.51 0.51 xt 0.5 0.5 0.5 0.35 0.35 0.35 0.3 60 % Kvs FL 0.72 0.72 0.67 0.59 0.59 0.59 0.54 xt 0.6 0.6 0.6 0.5 0.5 0.5 0.35 40 % Kvs FL 0.79 0.79 0.72 0.67 0.67 0.67 0.57 xt 0.70 0.70 0.70 0.60 0.60 0.60 0.50 25 % Kvs FL 0.85 0.85 0.78 0.74 0.74 0.74 0.61 xt 0.75 0.75 0.75 0.65 0.65 0.65 0.55 3
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 25 1 16 40 1 1 2 20 50 2 20 80 3 25 100 4 25 150 6 40 200 8 40 Max. perm. supply pressure 60 3 3 5 39 52 52 6 60 6 5.5 35 40 6 100 3 3 17 23 52 52 52 6 100 6 5.5 52 52 6 60 6 5.5 14 18 6 100 3 3 5 8 32 52 52 6 100 6 5.5 31 36 6 150 3 3 21 27 52 52 52 6 150 6 5.5 52 52 6 60 6 5.5 5 7 6 100 3 3 2 3 15 25 38 6 100 6 5.5 14 17 6 150 3 3 9 12 29 40 52 6 150 6 5.5 29 34 6 150 6 5.5 8 10 6 220 3 3 7 7 18 29 40 6 220 6 5.5 20 20 6 300 3 3 10 12 26 40 52 6 300 6 5.5 25 29 6 150 6 5.5 5 6 6 300 3 3 6 7 15 23 31 6 300 6 5.5 14 16 6 600 3 3 14 17 32 48 52 6 600 6 5.5 32 36 6 300 6 5.5 6 7 6 600 3 3 6 7 14 21 28 6 600 6 5.5 13 15 6 1200 3 3 13 14 27 40 52 6 1200 6 5.5 28 30 6 300 6 5.5 2 3 6 600 3 3 2 3 7 11 14 6 600 6 5.5 7 8 6 1200 3 3 6 7 14 21 28 6 1200 6 5.5 14 15 6 4
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 25 1 16 40 1 1 2 20 50 2 20 80 3 25 100 4 25 150 6 40 200 8 40 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 60 3 3 5 39 52 52 6 60 6 5.5 35 40 6 100 3 3 17 23 52 4.2 100 6 5.5 52 52 6 60 6 5.5 14 18 6 100 3 3 5 8 32 52 52 6 100 6 5.5 31 36 4.2 150 3 3 21 27 52 52 52 5.2 150 6 5.5 52 52 6 60 6 5.5 5 7 6 100 3 3 2 3 15 25 38 6 100 6 5.5 14 17 4.2 150 3 3 9 12 29 40 52 5.2 150 6 5.5 29 34 6 150 6 5.5 8 10 6 220 3 3 7 7 18 29 40 6 220 6 5.5 20 20 4.2 300 3 3 10 12 26 40 52 5.2 300 6 5.5 25 29 6 150 6 5.5 5 6 6 300 3 3 6 7 15 23 31 6 300 6 5.5 14 16 4.2 600 3 3 14 17 32 48 5.2 600 6 5.5 32 36 6 300 6 5.5 6 7 6 600 3 3 6 7 14 21 28 6 600 6 5.5 13 15 4.2 1200 3 3 13 14 27 40 52 5.2 1200 6 5.5 28 30 6 300 6 5.5 2 3 6 600 3 3 2 3 7 11 14 6 600 6 5.5 7 8 4.2 1200 3 3 6 7 14 21 28 5.2 1200 6 5.5 14 15 6 5
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 25 1 60 15 16 17 18 19 21 22 24 40 1 1 2 130 18 22 24 27 30 32 35 38 50 2 130 24 30 35 41 46 52 58 64 80 3 335 46 61 74 89 104 120 135 150 100 4 335 70 100 122 151 179 208 237 366 150 6 1280 143 208 260 324 389 454 518 583 200 8 1280 244 364 461 581 701 822 943 1064 Table 6 Dimensions in mm and weights Valve DN 25/1 40/1 1 2 50/2 80/3 100/4 150/6 200/8 Length L Type 72.1 Cl 150 184 222 254 298 352 451 543 Type 72.1 Cl 300 197 235 267 318 368 473 568 Type 72.3 PN 10/40 160 200 230 310 350 480 600 Type 72.4 102 114 125 165 194 229 243 Shaft d mm 16 20 20 25 25 40 40 B mm 60 80 90 115 130 170 190 A mm 130 150 170 210 230 330 350 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 72.1 20 41 51 65 108 130 160 Type 72.3 18 38 48 62 102 128 158 Type 72.4 8 18 20 27 38 65 90 Type SRP Rotary Actuator 60 100 150 220 300 600 1200 C mm 80 80 80 120 120 120 120 H3 mm 211 248 269 315 345 438 543 E mm 102 115 127 145 157 196 245 Connecting flange DIN 3337 F05 F07 F07 F10 F10 F12 F14 SW mm 14 17 17 22 22 27 36 Weight Type SRP approx. kg 3.5 4.5 6.5 10 13 24 46 Type 3767 Positioner F mm 160 160 160 160 160 160 160 6
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
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