Pneumatic Butterfly Valve Pfeiffer Type BR 14b/AT

Transcription

1 Pneumatic Butterfly Valve Pfeiffer Type BR 14b/AT Application Tight closing, double eccentric butterfly valve for process engineering and plants with industrial requirements Nominal size DN 80 to DN to 16 Nominal pressure PN 10 to 40 ANSI Class 150 and 300 Temperatures 10 C to 400 C 14 F to 752 F Double eccentric Type BR 14b Butterfly Valve with Single-acting Pfeiffer AT Type SRP Rotary Actuator. Valve body material Steel or Stainless steel Body style Wafer type Lug type (tapped holes) Sealing Soft sealing or Metal sealing Further features Low breakaway torque and low amount of wear due to the double eccentric bearing design of the shaft Disc can be replaced without having to remove the shaft TA-Luft (German clean air act) equivalent certification The control valves can be equipped with various accessories: positioners, solenoid valves and other components according to VDI/VDE Fig. 1 Type BR 14b/AT Butterfly Valve Versions Standard version (Fig.1) with single acting Pfeiffer AT Type SRP Rotary Actuator (see Data Sheet T 9929 EN) with Type BR 14 Disc with sealing ring made of PTFE with 20 % glass for temperatures from 10 C to +200 C (14 F to 392 F), nominal sizes DN 80 to DN 400 or Type BR 14 Disc with metal sealing ring for temperatures from 10 C to +250 C (14 F to 482 F), nominal sizes DN 80 to DN 400 Further versions DN 500 and DN 600 on request Facing with groove (only with series 16 and 25 of EN 558), Adjustable packing Double packing Primary seal with O-ring For high temperatures (+400 C) For cryogenic applications ( 196 C) Special materials Double acting Pfeiffer AT Type DAP Rotary Actuator Fig. 2 Type BR 14b Butterfly Valve with lever Single acting Type BR 30 Rotary Actuator Electric actuator Lever with locking plate up to DN 150 (Fig. 2) Manual gear Edition April 2000 Data Sheet

2 Principle of operation The process medium can flow through the butterfly valve in either direction. The direction of flow "A" (see Fig. 3) is recommended as less torque is required. The position of the butterfly disc (3) determines the flow across the free area between disc and body (1). Butterfly valves are sealed between the disc and seat. The compression force of the sealing ring (4) on the disc determines both the permissible differential pressure p and the breakaway torque when the disc opens or closes. The double eccentric bearing design causes the disc on opening or closing to remain in contact with the seat only over a very small angle of rotation. This reduces wear and increases the service life of the valve A 5 B Fail-safe position Attached to the AT Type SRP Rotary Actuator, the butterfly 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 butterfly valve closes when the supply air fails. Valve OPEN without supply air, the butterfly valve opens when the supply air fails Body 5 Mounting ring 2 Shaft 9 V-ring packing 3 Disc 10 Belleville spring washers 4 Sealing ring Fig. 3 Sectional diagram of Type BR 14b, lug type p 25 (bar) t ( C) Fig. 4 p/t diagram, version with soft sealing p (bar) PN 40/K PN 25/K1 15 HT 10 5 t ( C) Fig. 5 p/t diagram, version with metal sealing 2

3 Table 1 Technical data Nominal size DN 80 to to 16 Nominal pressure PN 10 to PN 40 ANSI Class 150 and 300 Body style Wafer or lug type Sealing ring Soft sealing Metal sealing Rangeability 50 : 1 DIN 3202 K1/EN Series 20 DIN Face to face dimensions (For PN 10 to 40, DIN 3202 K2/EN 558 Series 25 is possible) ANSI Class 150 with DIN 3202 K1 Class 300 with DIN 3202 K3/EN Series 16 Perm. operating pressures See pressure-temperature diagram Temperature range 1) C 10 to to 250 F 14 to to 482 Leakage class acc. to IEC 534 Part 4 V (VI on request) IV (V on request) 1) Version for high or low temperatures available on request Table 2 Materials (WN = Material Number acc. to DIN) Version DIN ANSI Body WN WN A 351 CF8M A 216 WCB Disc WN Shaft WN WN Mounting ring WN WN Packing flange WN Seal ring Soft sealing PTFE with 25 % glass PTFE with 40 % carbon to prevent electrostatic discharge Metal sealing Nickel Spacer PTFE with glass Packing Live-loaded PTFE V-ring packing Belleville spring washers WN , Delta Tone coated Terms for control valve sizing and noise level calculation Table 3a K vs values Nominal size Opening angle mm in , Table 3b C v values Nominal sizes Opening angle mm in Table 3c Terms for noise level calculation Op. angles FL xt z

4 Permissible differential pressures for Type BR 14b Butterfly Valve with Type SRP Rotary Actuator Table 4a Version with soft sealing, applicable for both fail-safe positions Pressures in bar Max. perm. supply pressure with shaft of Perm. differential pressure 1) for CLOSED position with direction of flow "A" mm Nominal size in Type SRP Actuator Springs n= Required signal pressure WN WN C +392 F +200 C +392 F Water Dry gas / / / / / / / / / / / / / / ) The permissible differential pressure corresponds to the operating pressure. 4

5 Permissible differential pressures for Type BR 14b Butterfly Valve with Type SRP Rotary Actuator Table 4b Version with metal sealing, applicable for both fail-safe positions Pressures in bar Max. perm. supply pressure with shaft of Perm. differential pressure 1) for CLOSED position with direction of flow "A" mm Nominal size in Type SRP Actuator Springs n= Required signal pressure WN WN C +392 F +200 C +392 F Water Dry gas / / / / / / / / On request ) The permissible differential pressure corresponds to the operating pressure. 5

6 Table 5 Permissible shaft and closing torques The required torques stated are average values which were measured with water at 20 C with the corresponding differential pressures. Operating temperature, process medium and long operating times may affect the torque considerably. The closing torque increases by 20 % when dry gas is used. Torque for the direction of flow "B" can be obtained on request. Perm. shaft torque with shaft of Required torque in Nm with closing pressure in direction of flow "A" Nominal size WN WN PTFE seal ring Metal seal ring mm in +250 C +482 F +250 C +482 F 3.5 bar 10 bar 16 bar 5 bar 10 bar 20 bar 40 bar On request On request Table 6 Dimensions in mm and weights Nominal size DN/in 80/3 100/4 150/6 200/8 250/10 300/12 400/16 L Wafer type Lug type PN 10 to 40 Cl Class A B D A B D On request PN PN K Lug type PN PN Class Class K Wafer type 1) See lug type Flange DIN 3337 F05 F05 F07 F10 F10 F12 F14 SW Width across flats Weight approx. kg ) With through bores 6

7 SW D1 D F VKT Square end C A1 K D2 B1 L H L C A2 B2 Fig. 6 Dimensional drawing for wafer and lug body style Table 7 Type SRP Rotary Actuator Dimensions in mm and weights Rotary Actuator Type SRP D H F Connecting flange DIN 3337 F07 F10 F10 F12 F12 F14 F14 F16 F16 Square end Weight Approx. kg On request Table 8 Mounting kit acc. to DIN/ISO 5211 for Type SRP Rotary Actuator Dimensions in mm Connecting Disc F05 F05 F07 F05 F07 F10 F05 F07 F10 F07 F10 F14 F10 F14 flange Actuator F05 F07 F07 F10 F10 F10 F12 F12 F12 F14 F14 F14 F16 F16 C mm

8 Following details are required on ordering: Nominal size DN... Nominal pressure PN... Body material Acc. to Table 2 Disc Metal sealing or soft sealing Direction of flow "A", standard forward flow for throttling service or "B", reversed flow for shut-off service Actuator Type SRP... Fail-safe position Valve OPEN or CLOSED Supply air... bar Operating range Number of springs Operating pressure... bar Temperature of medium... C Medium Dry or lubricating Specifications subject to change without notice. SAMSON AG MESS- UND REGELTECHNIK Weismüllerstraße 3 D Frankfurt am Main Telefon (0 69) Telefax (0 69) Internet: