The pilot operated vent valve has added a higher degree of control for tank storage applications.
The Cashco pilot operated vent offers the best pilot operated vent technology on the market today.
The unit allows for bubble tight seat leakage until the pilot starts to exhaust. At that time, the vent starts to opens and is fully open at 10% over pressure. Unlike non-pilot operated units that requires substantial over pressure in order to obtain full lift.
The blowdown is limited and the valve reseats at set point, where the non-pilot operated units will go below set point in order to reseat.
When non-pilot operated vents stay open longer to reseat, additional venting of tank vapours occur and possibly N2 consumption rises. In addition to this feature, the Cashco Pilot operated vent does not allow back pressure in the connected header system to effect the set point of the device like a weight loaded device.
The pilot controlling the opening of the vent is independent of the header pressure and eliminates this problem. It should be noted that if the header pressure is higher than the tank pressure the free floating pallet design of the Cashco pilot operated vent will not allow the pallet to open therefore preventing possible back flow into the tank.
Body materials available in carbon steel or stainless steel with various soft goods to suit applications.
Pilot operated vent valves that we can supply:
- Body size ranging from 2” to 12”
- free venting or pipeaway