Ball Valves for Liquid Nitrogen (LN₂) Service
Which ball valves configuration suits Liquid Nitrogen (LN₂) (N₂(l)), in which material, to which standard — from real service data, with the pitfalls flagged.
Which ball valves for Liquid Nitrogen (LN₂)?
Extended-Bonnet Ball Valve (SS 316L) - Standard isolation valve for LN₂ service; extended bonnet keeps packing at ambient temperature Typical service window: 0–25 barg (storage/transfer), up to 40 barg (high-pressure LN₂ systems), −196°C at normal boiling point; up to ambient during warmup.
Recommended Configurations
Extended-Bonnet Ball Valve (SS 316L)
Standard isolation valve for LN₂ service; extended bonnet keeps packing at ambient temperature
Body Material for Liquid Nitrogen (LN₂)
Rated from real compatibility data - click any material for the full decision page.
Governing Standards for Liquid Nitrogen (LN₂) Service
What to Avoid in Liquid Nitrogen (LN₂) Service
- Applies to this type: Standard-bonnet ball valves without extended stem - packing ices up
- Carbon steel valves of any type
Service Considerations
- All valves must have extended bonnets - stem packing must be at or above ambient temperature
- Rapid cooldown thermal cycling - stainless steel preferred for CTE compatibility
- Safety relief valves must be sized for maximum heat ingress boil-off rate
- LOX condensation risk - LN₂ equipment must be kept free of oxygen-rich contamination
Other valve types for Liquid Nitrogen (LN₂)
Ball Valves for other services
Connected Engineering
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