Cryogenic Valves
Cryogenic Emergency Shut-Off Valves
Pneumatic fail-safe cryogenic shut-off valves designed for rapid flow isolation and emergency shutdown in liquid gas pipelines and storage terminals.
OVERVIEW
Fail-Safe Cryogenic Flow Isolation
Our cryogenic emergency shut-off valves (ESD) are designed to provide rapid, fail-safe isolation of flow in lines handling LNG, liquid nitrogen, oxygen, and other cryogenic fluids down to -196°C. Actuated by single-acting spring-return pneumatic actuators, they close instantly upon signal loss or air supply failure. They feature gas-column extended bonnets to clear cold jackets and prevent actuator freeze-up, manual handwheel overrides, and tight-seating PCTFE trims for bubble-tight closure.
Key Features
- ✔️ Rapid Emergency Isolation - Instantly shuts off cryogenic flow during emergency conditions
- ✔️ Ultra-Low Temperature Performance - Designed for reliable operation in cryogenic applications
- ✔️ Bubble-Tight Sealing - Ensures leak-free isolation for maximum system safety
- ✔️ Fast Actuation - Available with pneumatic or electric actuators for quick emergency response
- ✔️ Ideal for LNG & Industrial Gases - Suitable for LNG, LOX, LIN, LAR, LPG, and other cryogenic fluid systems
Brand Partner
Technical Specifications
| Parameter | Details |
|---|---|
| Size Range | 1/2″ - 12″ (DN15 - DN300) |
| Pressure Rating | PN10 - PN100, Class 150# - 900# |
| Temperature Range | -196°C to +80°C |
| Body Materials | Stainless Steel (CF8, CF8M, CF3M), Bronze (CC491K) |
| Seat Materials | PCTFE, PTFE, Metal-to-Metal with Stellite 6 overlay |
| Bonnet Extension | gas column length compliant with BS 6364 / EN 1626 |
| Actuator Type | Single-Acting Pneumatic Diaphragm / Piston Actuator (Spring Return) |
| Fail-Safe Action | Fail-Close (FC) / Air-to-Open (standard) |
| Emergency Override | Manual Top Handwheel Override option |
| Closing Time | Fast shut-off (typically < 1.0 second depending on size) |
| Design Standards | EN 1626, ISO 21011, BS 6364, API 607 (Fire Safe) |
| Testing Standards | EN 12266-1, API 598 |
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