Ball Valves for Argon (Ar) Service
Which ball valves configuration suits Argon (Ar) (Ar), in which material, to which standard — from real service data, with the pitfalls flagged.
Which ball valves for Argon (Ar)?
Ball Valve (trunnion or floating) - Reliable isolation for argon blanketing and purging on steel furnaces and ASU distribution Extended-Bonnet Ball Valve (SS 316L) - Required for cryogenic LAR service at −186°C Typical service window: 5–250 barg (GAR); 0–10 barg (LAR storage), −186°C (LAR) to +200°C (heated processes).
Recommended Configurations
Ball Valve (trunnion or floating)
Reliable isolation for argon blanketing and purging on steel furnaces and ASU distribution
Extended-Bonnet Ball Valve (SS 316L)
Required for cryogenic LAR service at −186°C
Body Material for Argon (Ar)
Rated from real compatibility data - click any material for the full decision page.
Governing Standards for Argon (Ar) Service
What to Avoid in Argon (Ar) Service
- Non-cryogenic rated valves for liquid argon
- Valves with dead legs or crevices in high-purity semiconductor service
Service Considerations
- High-purity argon in semiconductor fabs requires electropolished SS 316L valves, no dead legs
- Liquid argon requires extended-bonnet valves - same as LN₂ requirements
- Heavier than air: accumulates in pits and trenches - forced ventilation required
Other valve types for Argon (Ar)
Ball Valves for other services
Connected Engineering
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