|
Pressure Unloader Valves
| Bolt-On Unloaders |
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.
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.
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.
| 3427 Springdale Forrest Circle Gainesville, Georgia 30506 All Rights Reserved. |
