Why Cryogenic Testing Matters
Valves for LNG and liquid nitrogen services must be tested at cryogenic temperature to verify seat sealing and stem packing performance where materials contract.
Core Test Steps
- Pre-test at ambient conditions
- Cool down to -196°C with a controlled soak period
- Operate the valve at temperature (open/close cycles)
- Leak test with helium or gas, record leakage rate
- Warm-up and final inspection