K1 Unloader Valve
|K1||3/8 Bsp F||1/2 Bsp F||1050g||1/2 Bsp M||34.0168.01A|
An unloader valve allows a pump to bypass the flow of water while the gun is closed. It is a safety device designed to protect the pump in the event of over pressurization.
The K1 is a zero- pressure, 41l/min, 250 bar, unloader valve. A normal unloader is flow sensitive therefore, closing the gun opens the unloader’s bypass aperture. This allows the water to discharge at a low pressure.
The K1 is different in the sense that it maintains a constant, low pressure in the delivery & bypass lines. Thus permitting a lower pressure in both the pump & delivery line under bypass conditions. Hence line hammer when using the K1 is significantly reduced.