Performance

The allowable tolerance of the set pressure:≤±3% of the set pressure

Overpressure:≤10% of the set pressure

Blowdown:≤10% of the set pressure

Tightness: The valves have good seat tightness, conforms to API Std 527

Features

● The soft seat design provides good seat tightness before and after each relief cycle.

●  The system can be operated nearer set pressure without valve leakage.

●  No more overpressure required for full lift of main valve.

●  Proper valve operation and lift are unaffected by back pressure.

●  Adjustable blowdown.

●  Non-flowing pilot reduces product loss and environmental pollution.

Quick simple verification of set pressure while valve remains in service.