When Does an Unloader Valve Work?

How Does an Unloader Valve Work? When the air pressure inside the compressor's tank reaches the pressure switch's cut out pressure (the point when air is no longer delivered), the switch automatically trips off and interrupts the power supply to the motor.

How does an unloader valve work?

The Unloader valve is designed to respond to an increase in pressure or a change in water flow. ... The trigger shuts off the water flow, causing the unloader valve to re-circulate the water back to the header tank or alternatively back to the inlet side of the pump. This is sending the water into bypass.

What is the purpose of the unloader valve?

The unloader diverts the flow of water from the outlet side of the pump back to the inlet side, causing water to flow in a loop back to the pump under virtually no pressure rather than to the nozzle under operating pressure. Flow may be directed back to the pump inlet or to a float tank or other type of reservoir.