Ammonia (NH₃) service
Service Selection
Ball Valves for Ammonia (NH₃) Service
Which ball valves configuration suits Ammonia (NH₃) (NH₃), in which material, to which standard — from real service data, with the pitfalls flagged.
Which ball valves for Ammonia (NH₃)?
Carbon steel ball valve (low-temp rated A333) - Process ammonia isolation and control Typical service window: Up to 25 bar (refrigerant); up to 200 bar (synthesis gas), -33°C (liquid refrigerant) to 300°C (synthesis service).
Recommended Configurations
Carbon steel ball valve (low-temp rated A333)
Process ammonia isolation and control
Body Material for Ammonia (NH₃)
Rated from real compatibility data - click any material for the full decision page.
Governing Standards for Ammonia (NH₃) Service
IIAR 2 - Ammonia refrigeration piping and equipmentASME B31.5 - Refrigeration pipingASME B31.3 - Process piping (process ammonia)ISO 15848 (fugitive emissions for toxic service)
What to Avoid in Ammonia (NH₃) Service
- Any valve with copper, brass, or bronze wetted parts or body
- Valves with zinc die-cast components
- Nylon or polyamide-seated valves
Service Considerations
- No copper or zinc - inspect every valve for copper alloy trim before installation
- Extended bonnet design for cryogenic (-33°C) liquid service
- Emergency isolation must be remotely operable
- Refrigerant grade NH₃ is oil-free - valves must be clean and degreased
Other valve types for Ammonia (NH₃)
Ball Valves for other services
Reviewed by Process Engineering, Vajra Industrial SolutionsDiscipline: Process & Fluid Service EngineeringLast reviewed: 20 June 2026
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