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Cryogenic Butterfly Valve
Cryogenic butterfly valves provide compact flow isolation in pipelines carrying LNG, liquid nitrogen, liquid argon and other liquefied gases. As a Cryogenic Butterfly Valve Manufacturer in Canada, Valves Only Canada supplies valves with stainless steel construction and cryogenic sealing arrangements for service down to −196°C.
The extended stem separates operating components from cold piping and accommodates pipeline insulation. Double-offset and triple-offset designs reduce disc-to-seat rubbing, while suitable sealing materials accommodate contraction during cooling. Liquid oxygen service requires oxygen-compatible materials and dedicated cleaning procedures.
Features
- Compact quarter-turn operation
- Extended stem for cryogenic installations
- Soft-seated or metal-seated construction
- Reduced seat friction through offset geometry
- Manual and automated operation
- Sealing performance verified through low-temperature testing
Technical Specifications
| Parameter | Specification |
| Valve Type | Cryogenic Butterfly Valve |
| Design | Double-offset or triple-offset |
| Nominal Size | DN50 to DN1200 |
| Pressure Rating | PN10, PN16, PN25 / ASME Class 150 and 300 |
| Minimum Service Temperature | Down to −196°C |
| Body Material | Cast Stainless Steel ASTM A351 CF8, CF8M or CF3M |
| Disc Material | ASTM A351 CF8M / CF3M or ASTM A182 F316 / F316L |
| Stem Material | Stainless Steel ASTM A276 Type 316 / ASTM A479 XM-19 |
| Seat Material | Cryogenic-qualified PCTFE / stainless steel metal sealing system |
| Stem Design | Extended stem |
| End Connections | Wafer, Lug, Double Flanged or Butt-Weld |
| Flow Direction | Unidirectional or bidirectional sealing |
| Actuation | Lever, Gear, Pneumatic or Electric |
Standards and Testing
Applicable standards include API 609 for butterfly valve construction and ASME B16.34 for pressure-temperature requirements. Flange connections may follow ASME B16.5, ASME B16.47 or EN 1092-1, with ASME B16.25 for butt-weld ends.
Inspection and pressure testing may follow API 598. ISO 28921-1 may be specified for low-temperature design and production testing. Cryogenic testing verifies operation and seat leakage at the required temperature.
Industries Served in Canada
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