Birkett Technical Catalogue - Safety Systems UK Ltd

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WB 400 - CONVENTIONAL GAS TYPES (class 900 and above) ITEM PART CARBON STEEL STAINLESS STEEL 1 Body SA 216-WCB CARB ST SA 351-CF8M ST ST 2 Casing SA 216-WCB CARB ST SA 351-CF8M ST ST 3 Cap SA 216-WCB CARB ST SA 351-CF8M ST ST 4* Nozzle 316 ST ST 316 ST ST 5* Disc 316 ST ST 316 ST ST 6* Disc holder ASTM A479-316L ASTM A479-316L 7 Reaction hood ASTM A479-431 ASTM A479-431 8 Blowdown ring SA 351-CF8M ST ST SA 351-CF8M ST ST 9 Guide plate 17-4 ST ST 17-4 ST ST 10* Spindle ASTM A479-431 ASTM A479-431 11 Lower spring cap ASTM A108-1021/Ni PLT ASTM A479-431 12 Adjusting screw ASTM A479-410 ASTM A479-410 13 Locking nut ASTM A108-1021 ASTM A479-316L 14 Setting screw ASTM A479-431 ASTM A479-431 15 Setting screw rod ASTM A479-316L ASTM A479-316L 16* Tabwasher BS 1449-304S15 ST ST BS 1449-304S15 ST ST 17* Pinning screw ASTM A479-431 ASTM A479-431 18 Body stud SA 193-B7 CR/MOL ST SA 193-B8T ST ST 19 Body nut SA 194-2H CARB ST SA 194-8T ST ST 20 Casing stud SA 193-B7 CR/MOL ST SA 193-B8T ST ST 21 Casing nut SA 194-2H CARB ST SA 194-8T ST ST 22* Spring CARBON STEEL ASTM A313-316 24* Spindle head ASTM A479-431 ASTM A479-431 27* Body gasket ST-706 ST-706 28* Cap gasket ST-706 ST-706 29* Setting screw gasket ST-706 ST-706 31* Ball AISI 440C ST ST AISI 440C ST ST 32 Upper spring cap ASTM A108-1021/Ni PLT ASTM A479 431 33 Data plate 321 ST ST 321 ST ST 34 Hammer drive screw ELECTRO BRASSED ST ASTM A479-316L 35* Grooved pin ASTM A479-431 ASTM A479-431 42 Drain plug HTS HOLO-KROME ASTM A479-316L * Recommended spares 13
WB 300 - BALANCED BELLOWS GAS TYPE (class 900 and above) ITEM PART CARBON STEEL STAINLESS STEEL 1 Body SA 216-WCB CARB ST SA 351-CF8M ST ST 2 Casing SA 216-WCB CARB ST SA 351-CF8M ST ST 3 Cap SA 216-WCB CARB ST SA 351-CF8M ST ST 4* Nozzle 316 ST ST 316 ST ST 5* Disc 316 ST ST 316 ST ST 6* Disc holder base ASTM A479-321 ASTM A479-321 7 Reaction hood ASTM A479-431 ASTM A479-431 8 Blowdown ring SA 351-CF8M ST ST SA 351-CF8M ST ST 9 Guide plate 17-4 ST ST 17-4 ST ST 10* Spindle ASTM A479-431 ASTM A479-431 11 Lower spring cap ASTM A108-1021/Ni PLT ASTM A479-431 12 Adjusting screw ASTM A479-410 ASTM A479-410 13 Locking nut ASTM A108-1021 ASTM A479-316L 14 Setting screw ASTM A479-431 ASTM A479-431 15 Setting screw rod ASTM A479-316L ASTM A479-316L 16* Tabwasher BS 1449-304S15 ST ST BS 1449-304S15 ST ST 17* Pinning screw ASTM A479-431 ASTM A479-431 18 Body stud SA 193-B7 CR/MOL ST SA 193-B8T ST ST 19 Body nut SA 194-2H CARB ST SA 194-8T ST ST 20 Casing stud SA 193-B7 CR/MOL ST SA 193-B8T ST ST 21 Casing nut SA 194-2H CARB ST SA 194-8T ST ST 22* Spring CARBON STEEL ASTM A313-316 23* Bellows SA240-316L SA240-316L 24* Spindle head ASTM A479-431 ASTM A479-431 25 Piston ASTM A479-431 ASTM A479-431 26 Guide spindle ASTM A479-321 ASTM A479-3431 27* Body gasket ST-706 ST-706 28 Cap gasket ST-706 ST-706 29 Setting screw gasket ST-706 ST-706 31 Ball AISI 440C ST ST AISI 440C ST ST 32 Upper spring cap ASTM A108-1021/Ni PLT ASTM A479 431 33 Data plate 321 ST ST 321 ST ST 34 Hammer drive screw ELECTRO BRASSED ST ASTM A479-316L 35 Grooved pin ASTM A479-431 ASTM A479-431 42 Drain plug HTS HOLO-KROME ASTM A479-316L 50 Grubscrew ASTM A479-321 ASTM A479-321 * Recommended spares 14
Page 1 and 2: Pressure & Flame Protection Safety
Page 3 and 4: CONTENTS Page Birkett Range 3 Intro
Page 5 and 6: INTERNATIONAL APPROVALS AND AUTHORI
Page 7 and 8: FEATURES AND BENEFITS Design verifi
Page 9 and 10: THE EFFECT OF BACK PRESSURE The con
Page 11 and 12: LIFT CYCLE Stage 1 - Closed Inlet p
Page 13: WB 300 - BALANCED BELLOWS GAS TYPE
Page 17 and 18: FERRULE Ferrule (government ring) A
Page 19 and 20: RECOMMENDED MATERIAL TEMPERATURE RA
Page 21 and 22: VALVE SELECTION TABLE D - 0.110 in
Page 23 and 24: VALVE SELECTION TABLE E - 0.196 in
Page 25 and 26: VALVE SELECTION TABLE F - 0.307 in
Page 27 and 28: VALVE SELECTION TABLE G - 0.503 in
Page 29 and 30: VALVE SELECTION TABLE H - 0.785 in
Page 31 and 32: VALVE SELECTION TABLE - 1.287 in 2
Page 33 and 34: VALVE SELECTION TABLE K - 1.838 in
Page 35 and 36: VALVE SELECTION TABLE L - 2.853 in
Page 37 and 38: VALVE SELECTION TABLE M - 3.60 in 2
Page 39 and 40: VALVE SELECTION TABLE N - 4.34 ins
Page 41 and 42: VALVE SELECTION TABLE P - 6.38 ins
Page 43 and 44: VALVE SELECTION TABLE Q - 11.05 in
Page 45 and 46: VALVE SELECTION TABLE R - 16.00 in
Page 47 and 48: VALVE SELECTION TABLE T - 26.00 in
Page 49 and 50: BLOWDOWN RING SETTING The blowdown
Page 51 and 52: SEAT TIGHTNESS / SEAT LEAKAGE TESTI
Page 53 and 54: FEATURES AND BENEFITS Design verifi
Page 55 and 56: D SERIES THERMAL RELIEF VALVES ITEM
Page 57 and 58: SAFEFLO - SAFETY AND THERMAL RELIEF
Page 59 and 60: D SERIES DIMENSIONS Female screwed
Page 61 and 62: FEATURES AND BENEFITS Close system
Page 63 and 64: MODE OF OPERATION Safeset consists
Page 65 and 66:
STAGES OF OPERATION - TYPE 2 PILOT
Page 67 and 68:
MODULATING ACTION - TYPE 8 The Type
Page 69 and 70:
STAGE 4 System pressure above set p
Page 71 and 72:
MATERIALS OF CONSTRUCTION - MAIN VA
Page 73 and 74:
ACCESSORIES Back flow preventer Hig
Page 75 and 76:
ACCESSORIES Others Similar to the s
Page 77 and 78:
SAFESET PILOT FIGURE NUMBERING SYST
Page 79 and 80:
Size Orifice Rating A (ins) D (ins)
Page 81 and 82:
FLANGE PRESSURE / TEMPERATURE LIMIT
Page 83 and 84:
(4) Constant, Fb Fb = 2k k-1 Pb P k
Page 85 and 86:
BACKPRESSURE AND BLOWDOWN LIMITS Fi
Page 87 and 88:
Table 3 Representative data on liqu
Page 89 and 90:
Graph 4.0 Factor Fl - For applicati
Page 91 and 92:
Pressure Protection 90
Page 93 and 94:
SATURATED STEAM CAPACITY CHART WB 4
Page 95 and 96:
AIR CAPACITY CHART Pilot:Types 2, 4
Page 97 and 98:
DUAL OUTLET / FULL BORE PILOT VALVE
Page 99 and 100:
DEFINITION OF TERMS Pressure Relief
Page 101 and 102:
PRESSURE TERM RELATIONSHIP Pressure
Page 103 and 104:
SAFETY RELIEF VALVES B/C Series D S
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Birkett Technical Catalogue - Safety Systems UK Ltd

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