Cryogenic Emergency Cut Off Valve
As a Cryogenic Emergency Cut Off Valve Supplier in USA, Valves Only delivers valves engineered for rapid isolation of cryogenic media during abnormal or emergency conditions. These valves are purpose-built for handling liquefied gases such as LNG, liquid oxygen, and liquid nitrogen at extremely low temperatures. With extended bonnets, specialized trim, and full compliance with BS 6364 cryogenic testing, they provide fast and reliable shutoff that safeguards pipelines, equipment, and personnel in critical facilities.
How Cryogenic Emergency Cut Off Valves Work
Cryogenic emergency cut off valves integrate with plant-wide emergency shutdown systems. When a leak, overpressure, or trip is detected, the actuator—typically pneumatic for fast response, or electric for digital integration—forces the valve closed within seconds to stop the flow.
- Extended stems and bonnet assemblies help prevent freezing around the actuator and maintain operability down to −196 °C.
- Fail-safe actuation options (fail-closed or fail-open) are configured according to the safety logic of the installation.
- Valves are tested under cryogenic conditions to ensure tight shutoff despite thermal contraction of metallic components.
Benefits
- Rapid and reliable isolation during emergency conditions
- Safe handling of LNG, liquid oxygen, and liquid nitrogen
- Extended bonnet design keeps packing and actuator free from ice buildup
- Zero-leakage performance verified to BS 6364 under cryogenic testing
- Seamless integration with emergency shutdown and safety instrumented systems
- Automated pneumatic or electric actuation for continuous readiness
Related Cryogenic Valve Types
Cryogenic emergency cut off valves are often deployed alongside other cryogenic valve designs, depending on the system:
- Cryogenic Short Stem Globe Valve – compact option for restricted space
- Cryogenic Long Stem Globe Valve – actuator isolated from cold media
- Cryogenic Jacketed Globe Valve – jacketed body to prevent freezing in critical service
- Forged Cryogenic Trunnion Ball Valve – large-diameter, high-pressure cryogenic duty
- Cryogenic Ball Valve – quarter-turn isolation with fast actuation
- Cryogenic Gate Valve – linear shutoff for on/off applications
- Cryogenic Check Valve – prevents backflow in cryogenic transfer lines
- Pneumatic Actuated Cryogenic Globe Valve – precise, automated control under cryogenic duty
Design Standards
- Globe and Gate Valves: BS 6364, ASME B16.34, DIN EN 12516
- Ball Valves: API 6D, ISO 17292, BS 6364
- Check Valves: API 6D, BS 1868, BS 6364
- General Cryogenic Valves: MSS SP-134, EN 1626
Inspection & Testing Standards
- BS 6364 – cryogenic testing for performance and leakage
- API 598 – hydrostatic and pneumatic pressure testing
- ISO 28921 – cryogenic test requirements for metallic valves
- EN 12266-1 – strength and leakage verification
Body & Trim Material Compatibility
| Category | Material / Grade | Standards / Specifications | Typical Applications |
|---|---|---|---|
| Carbon Steel | LCB, LCC | ASTM A352 | Low-temperature service down to −46 °C |
| Stainless Steel | CF8M, CF3M | ASTM A351 | LNG, oxygen, nitrogen transfer lines |
| Duplex Steel | F51 (2205) | ASTM A182 | Offshore and chloride-rich cryogenic service |
| Super Duplex | F55 (2507) | ASTM A182 / ASTM A890 | High-pressure LNG and aggressive brine duties |
| Alloy 20 | CN7M | ASTM B462 | Corrosive chemical by-products in cryogenic plants |
| Hastelloy | C276, B3 | ASTM B574 / ASTM B564 | Highly corrosive cryogenic gases and fluids |
| Inconel | 625, 718 | ASTM B446 / ASTM B564 | High-pressure, subzero LNG transfer and storage |
| Titanium | Grade 2, Grade 5 | ASTM B348 | Oxygen-rich cryogenic service and seawater applications |
Industries Served
As a Cryogenic Emergency Cut Off Valve Supplier in USA, we support applications across:
- LNG and Natural Gas – emergency shutoff in liquefaction, regasification, and storage
- Petrochemical and Refining – isolation of cryogenic by-products and feedstocks
- Industrial Gases – oxygen, nitrogen, and argon distribution in liquid form
- Power Generation – cryogenic storage and turbine fuel supply systems
- Marine and Offshore – LNG carrier loading, unloading, and bunkering operations
- Aerospace – liquid hydrogen and oxygen fueling systems for space applications
- Research Facilities – laboratories and test environments using cryogenic coolants
Special Features
- Extended bonnet assemblies designed for cryogenic duty
- Quick-acting pneumatic or electric actuation for emergency shutdown
- BS 6364-tested for leakage performance at cryogenic temperatures
- Fire-safe and low-emission construction available on request
- Available in sizes up to DN 1200, pressure classes up to Class 1500
- Customisation in body materials, trims, and actuation packages to match project requirements
