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Cryogenic Check Valves

Cryogenic

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Cryogenic Check Valves
BS 1868API 602API 6DBS 6364

Cryogenic non-return valves for low-temperature liquefied-gas systems, engineered for dependable one-way flow and tight seating down to -196°C.

Size Range50mm–300mm (2"–12")
Pressure RatingClass 150–600
Temperature Range-46°C to -196°C
Flow DirectionUni-directional
InstallationSelected according to swing or lift-check configuration
ServiceLNG, propane, oxygen, helium and other liquefied gases
Production CapacityShared cryogenic line: 1,200 units/year
CategoryCryogenic

Key Features

Engineered for Performance

  • Swing or piston-lift configurations
  • Self-aligning disc for positive seating
  • Renewable seat ring
  • Low opening differential pressure
  • One-way flow protection
  • Type-tested for service down to -196°C
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Material Options

Typical Materials of Construction

Body & bonnet / coverASTM A216 WCB; ASTM A217 WC6, WC9 or C12A; ASTM A352 LCB; ASTM A351 CF8, CF8M, CF3 or CF3M
Wedge / disc & seatCA15 or WCB with 13% chromium facing; WC6 with Stellite; CF8, CF8M, CF3 or CF3M; Stellite facing available
Stem & gland partsASTM A276 Type 410, 304 or 316 stainless steel
Packing & gasketDie-formed or braided graphite packing with spiral-wound 316 / 316L graphite-filled gasket
BoltingASTM A193 B7, B16, B8 or B8M studs with ASTM A194 2H, 7, 8 or 8M nuts

Final material selection depends on pressure, temperature, media and service conditions.

Applications

Common Service Areas

  • LNG
  • Liquid propane
  • Liquid oxygen
  • Liquid helium
  • Cryogenic backflow prevention

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