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Low pressure Steel Swing Check Valves Sizes 2” – 20” ASME B16.34 – 1996 Valve overall lengths to ASME B16.10 – 1992 Pressure Class: 300, 600 61
62 Low Pressure Steel Swing Check Valves Sizes 2” – 20” ASME B16.34 – 1996 Valve overall lengths to ASME B16.10 – 1992 Pressure Class: 300, 600 Features & Benefits Excellent Reliability ● <strong>Weld</strong>ed-in seats hard-faced with Stellite ® or Equivalent ● Robust fixing of disc prevents possibility of failure (no fixng nut) ● No external bearings or seals ● Aluminium reinforced graphic gasket Typical Applications: ● Main Steam Service ● Boiler Feed Pump Protection ● L.P. Feed Heaters ● Blow Down Service ● Blow Off Service ● Gland Steam System Drains ● Steam Turbine Inlet ● Economizer Recirculation ● Spray Water ● Attemperator Spray ● Steam Blow and Start Up 1 2 3 4 5 6 The disc holder is supported by a hinge pin which is mounted in an integral lug on the valve seat, this arrangement eliminates the use of external seals or glands. The hinge pin is free to move in both components thus reducing the possibility of seizure in service. The disc is securely attached to the disc holder by a locking wire which allows self alignment of the disc on the seat, thus ensuring tight shut off on reversal of flow. This feature eliminates the use of locknuts or split pins, therefore preventing possible failure in service. <strong>Weld</strong>ed in seat ring Stellite ® faced. Bolted bonnet with Aluminium reinforced Graphoil Gasket. This range of valves incorporates, as standard expanded graphite joints located in tongue and groove configuration between the body and bonnet. The bonnet bolts are loaded to pre-determined values to ensure a pressure tight seal. Self aligning disc Stellite ® faced. The Dewrance modular design body accomodates a wide range of flanged and welded connections. Even unusual size requirements can be commonly met without difficulty. Low Pressure Steel Swing Check Valves 1 2 3 4 5 6 63
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HIGH PERFORMANCE LINE VALVES FOR PO
Page 3 and 4:
DEWRANCE CONTROLLING PRESSURE WORLD
Page 5 and 6: State of the art machine tools play
Page 7 and 8: QUALITY STANDARD AND NDE Dewrance h
Page 9 and 10: 10 A TOTAL VALVE CAPABILITY - FROM
Page 11 and 12: 12 High Pressure Cast Steel Paralle
Page 13 and 14: Advantages of Venturi Parallel Slid
Page 15 and 16: Pressure/Temperature Ratings (Paral
Page 17 and 18: Pressure/Temperature Ratings (Paral
Page 19 and 20: Cast Steel Parallel Slide Gate Valv
Page 31 and 32: High pressure Forged Steel Parallel
Page 33 and 34: 36 Forged Steel Parallel Slide Gate
Page 39 and 40: 42 Low Pressure Cast Steel Parallel
Page 47 and 48: High pressure Steel Check Valves Si
Page 49 and 50: 54 Pressure/Temperature Ratings (Ch
Page 51 and 52: 56 Forged Steel Swing Disc Check Va
Page 53 and 54: 58 Cast Steel Tilting Disc Check Va
Page 55: 60 Tilting Disc Check Valve Unique
Page 59 and 60: Cast Steel Swing Check Valve Sizes
Page 61 and 62: Cast Steel Swing Check Valve Sizes
Page 63 and 64: Bled Steam Check Valve Sizes 6” -
Page 65 and 66: Product Application Tests Flow Test
Page 67 and 68: 74 Pressure/Temperature Ratings Imp
Page 69 and 70: 76 Bled Steam Check Valve Sizes 6
Page 71 and 72: 78 Bled Steam Check Valve Unique Se
Page 73 and 74: 80 Bled Steam Check Valve - Options
Page 75 and 76: 82 Feed Water Heater Isolation Syst
Page 77 and 78: Feed Water Heater Isolation System
Page 79 and 80: Feed Water Heater Isolation Valve S
Page 81 and 82: Feed Water Heater Isolation Valve S
Page 83 and 84: Reheater Isolating Device Sizes 16
Page 85 and 86: Reheater Isolating Device Sizes 16
Page 87 and 88: 96 Pressure/Temperature Ratings Col
Page 89 and 90: 98 Reheater Isolating Device Featur
Page 91 and 92: 100 Materials of Construction ASTM
Page 93: DEWRANCE HEADQUARTERS IN THE UK UNI
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