Globe Valves for LNG & Cryogenic Service
Extended-bonnet ball, gate, and globe valves for LNG, liquid nitrogen, liquid oxygen, and other cryogenic service - low-temperature impact tested materials.
Which globe valves are used for lng & cryogenic service?
Cryogenic service (below −46°C to −196°C) requires valves specifically designed and tested for extreme low temperatures. LNG (−162°C), liquid nitrogen (−196°C), liquid oxygen (−183°C), and liquid CO₂ applications demand low-temperature impact-tested materials, extended bonnets to prevent packing freeze, and cryogenic testing per BS 6364 or ASME B16.34 Annex F.
Cryogenic Globe Valve (Extended Bonnet)
Flow control and throttling in LNG process and vent/flare systems
Critical Requirements
- Charpy V-notch impact testing at design temperature (−46°C to −196°C) per ASTM A370
- Extended bonnet design to maintain stem packing above −20°C minimum
- Cryogenic testing per BS 6364: gas bubble leak test at operating temperature
- Materials: ASTM A350 LF2 (forged) or A351 CF8M/CF3M (cast) - not A216 WCB
- Fire-safe design (API 607) for LNG and flammable cryogenic fluids
- Full-bore design where pigging or slug control is required
Service Challenges
- LNG at −162°C - most carbon steels become brittle (DBTT); must use low-temperature impact-tested alloys
- Liquid oxygen - fire and explosion risk if hydrocarbons present; oxygen-clean service essential
- Liquid nitrogen - extreme cold; thermal cycling causes fatigue in seals and fasteners
- Icing / frosting - moisture in atmosphere can ice on cold valve surfaces; extended bonnet keeps packing warm
- Boil-off gas - pressure relief and safety valve sizing must account for flash vaporisation
Vajra Globe Valves
Precision globe valves for throttling, flow regulation, and frequent operation.
See the full Globe Valves rangeOther valves for lng & cryogenic service
Globe Valves for other applications
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