Vacuum Service service
Service Selection
Gate Valves for Vacuum Service Service
Which gate valves configuration suits Vacuum Service (Sub-atmospheric pressure), in which material, to which standard — from real service data, with the pitfalls flagged.
Which gate valves for Vacuum Service?
Gate Valve (OS&Y, pressure-seal bonnet for high-temp vacuum) - Mainline isolation on crude vacuum column overhead and bottoms Typical service window: 0.001–101 kPa absolute (deep vacuum to near-atmospheric), Ambient (pharma freeze-drying) to 420°C (refinery crude vacuum unit).
Recommended Configurations
Gate Valve (OS&Y, pressure-seal bonnet for high-temp vacuum)
Mainline isolation on crude vacuum column overhead and bottoms
Body Material for Vacuum Service
Rated from real compatibility data - click any material for the full decision page.
Governing Standards for Vacuum Service Service
ASME B16.34API 600 (refinery vacuum gate valves)ASME Section VIII (vacuum vessels)IBR (vacuum steam boilers)
What to Avoid in Vacuum Service Service
- Wafer-pattern valves without bolted support in full vacuum - face gaskets may be pulled inward
- Butterfly valves with rubber liners for deep vacuum - liner collapses
Service Considerations
- Valve seats must seal against reverse differential (atmospheric pressure pushing in) - soft seats preferred for tight shutoff
- Graphite or expanded PTFE packing preferred - standard PTFE packing may be pulled inward in deep vacuum
- Crude vacuum unit transfer line: erosion from coke particles requires hardened trim
- Vacuum breaker (vacuum relief valve) mandatory on vacuum vessels - vessel collapse can cause catastrophic failure
Other valve types for Vacuum Service
Gate Valves for other services
Reviewed by Process Engineering, Vajra Industrial SolutionsDiscipline: Process & Fluid Service EngineeringLast reviewed: 20 June 2026
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