OEM Unloader Valve Kit 2901146300 Screw Air Compressor Spare Parts

Unloader Valve is normally used to vent a pressurized tank. The valve can also be used to recirculate gas from a high pressure to low pressure system. The valve can have an orifice on the exit so that the flow is controlled. The valve is fully pneumatic so that no spring is present. The valve is piloted to act and the system operates to return the valve. The normally closed blow down valve is commonly used to blow down the air/oil separator tank of a rotary screw compressor. The valve is attached to the tank so the tank pressure keeps the valve closed. To “blow down” the tank the valve is piloted open. The piston is designed so that the pilot pressure is less than the tank pressure. The Blow Down valve is a piloted normally open or normally closed valve.

UNLOADING VALVE PROBLEM

A lot of people come to this page because they are having problems with their unloading valve. A common fault is that the unloading valve stays always open, or the opposite: the unloading valve does not open anymore.

If the unloader doesn’t open anymore, you will get startup problems. Plus, you will not hear the typical blow-down of compressed air when the compressor stops.

If the unloader stays open, you will hear a continues leak of compressed. I usually sounds like the pressure switch is leaking, because the unloader is often located on/near/inside the pressure switch.

2901146300 Unloader Valve Kit is a critical part of Compressor, made of high quality raw materials in state of the art manufacturing facility.
Ensuring high performance output and enhanced life of Compressor and parts.

Qingdao Futai, Air Compressor Filter Manufacturer in China.