Pressure Unloader Valves @ www.pressurewashoutlet.com
Pressure Washer Unloaders from Pressure Wash Outlet
Unloaders from Pressure Wash Outlet
Pressure Washer Unloaders from Pressure Wash Outlet
Pressure Unloader Valves
Bolt-On-Unloaders @ www.pressurewashoutlet.com
Pressure unloader valves are important part of your pump system.  Unloader Valves
are the traffic directors of your pump and pressure regulator. They serve to direct the
flow of water in a pressure washer system. When water stops flowing from the nozzle
of a spray gun, the unloader valve redirects it for a safe pressure outlet. When the
cleaner is in “bypass mode,” water that is not released by the spray gun is diverted
back to the inlet side of the pressure pump. It then circulates through the pump and
back to the inlet side of the unloader valve. Water is once again either released via the
spray gun, or redirected to the pump.
Although cycling prevents the dangerous buildup of pressure, added safety concerns
arise during bypass. Most pressure cleaner pumps can withstand temperatures of
140º F. At higher temperatures, damage to the pump can occur. Pump packings,
plungers, seals, and even the short bypass hose in external bypass systems may be
damaged. Thermal Relief Valves offer some protection against excessive heat buildup.
They ensure cool water is released to the pump when temperatures rise.  Operators
are advised to always take care to prevent overheating regardless of the presence of
Thermal Relief valves.
Pumps should not be allowed to operate in bypass mode for
more than 2 to 3 minutes.
Squeezing the spray gun trigger always interrupts cycling
and introduces new, cool water to the system.
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