Compressed Air service
Service Selection
Ball Valves for Compressed Air Service
Which ball valves configuration suits Compressed Air (N₂ / O₂ mixture), in which material, to which standard — from real service data, with the pitfalls flagged.
Which ball valves for Compressed Air?
Ball Valve (full-bore, SS or brass body) - Low pressure drop, fast operation, suitable for all air pressures and instrument air. Typical service window: 5–10 bar (instrument/plant air); up to 40 bar (high-pressure air), Ambient to 60°C (post-cooler discharge).
Recommended Configurations
Ball Valve (full-bore, SS or brass body)
Low pressure drop, fast operation, suitable for all air pressures and instrument air.
Body Material for Compressed Air
Rated from real compatibility data - click any material for the full decision page.
Governing Standards for Compressed Air Service
What to Avoid in Compressed Air Service
- Cast iron valves in instrument air service (risk of internal corrosion contaminating air supply)
- Large-bore butterfly valves in pulsating or compressor discharge service without surge analysis
- Plastic-bodied valves above 10 bar or in environments where UV degradation is a risk
Service Considerations
- Instrument air must be oil-free and dry - oil contamination damages positioners and instruments
- Moisture separators and filters required at all panel and instrument connection points
- Receiver tank safety valves must be IBR-certified for vessels >0.5 m² heating surface
- Compressed air lines carrying > 7 bar must be inspected per Factories Act and Pressure Vessel regulations
Other valve types for Compressed Air
Ball Valves for other services
Reviewed by Process Engineering, Vajra Industrial SolutionsDiscipline: Process & Fluid Service EngineeringLast reviewed: 20 June 2026
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