For Rotary Compressors and air system.

1.as a component of the idling bypass system.

2.to vent the oil separator automatically on shut-down.

3.To vent pneumatic control systems to free air.

Operation:

Venting Valves are normally open two way valves without return spring. Open or closed valve position is determined by the previous valve action. Open Venting Valves are closing by signal pressure (< 0.5 bar (g)) applied to inlet E. Pressure at inlet P should not be higher than pressure at inlet E to close the valve.