Pilot-operated relief valve

From Wikipedia, the free encyclopedia

A Pilot-Operated Relief Valve is used to relieve large flows with small pressure differential.

"Because these valves do not start opening until the system reaches 90% of full pressure, the efficiency of the system is protected because less oil is released. These valves are best suited for high pressure, high volume applications. Although their operation is slower than that of direct-acting relief valves, pilot-operated relief valves maintain a system at a more constant pressure while relieving." ^{[1] [2] [3]}

The main manufacturers of pilot operated safety relief valves are:

• Sarasin-RSBD (France)
• Consolidated (USA)
• Anderson-Greenwood (USA)
• Farris (Canada)
• AST (Italy)

[edit] See also

• Three Mile Island nuclear accident
• Relief valve
• Safety valve

[edit] References

1. ^ Pressure-control valves - part 1. 070111 hydraulicspneumatics.com no opening until 90% of full pressure
2. ^ PORV - What does PORV stand for? Acronyms and abbreviations by the Free Online Dictionary.. 070111 acronyms.thefreedictionary.com
3. ^ NMAH. 070111 americanhistory.si.edu

[edit] External links

• Sample PORV: http://www.taylorvalve.com/products/safety-relief-valves/pilot-valve/9300-series/