These pressure-actuated valves control the flow of the water to the nozzle(s). During bypass mode, all of the water is directed back to the supply; however system pressure remains constant (or slightly higher). This valve is typically used for applications which require frequent on/off action, such as a car wash application. However, they are more frequently used in applications that require a constant pressure at the point of use. They also are used whenever the driver of the pump is turned on/off, such as misting systems. While slightly different design concepts are used, typically these unloaders will actuate at 5 to 20% above the operating pressure of the system.
Flow ranges are from 0.5 GPM (2 l/min) to 625 GPM (2366 L/min) and pressure range is from 100 PSI to 50,750 PSI (7 to 3500 Bar). In lower pressure applications, a manually adjusted spring is used to control the flow; however, pneumatic and electric controls can also be used. Typical metal materials are forged brass, 303 stainless steel, 316 stainless steel and elastomers will be either Nitrile, Viton or Teflon.
For individual specifications see below.
WARNING: This product might contain a chemical known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
|Maximum Flow||6.6 GPM||25 L/min|
|Min Pressure||0 PSI||0 bar|
|Max Pressure||4000 PSI||275 bar|
|Maximum Temperature||194 °F||90 °C|
|Inlet Port||3/8" FNPT|
|Outlet Port with Injector||3/8" MNPT|
|Outlet Port without Injector||3/8" FNPT|
|Bypass Port||3/8" FNPT|
|Weight||2 lbs.||0.91 kg|
|Full Repair Kit – Part #09321|
|Seal Repair Kit – Part #09322|
For 50 years, Giant Pumps has offered the most dependable positive displacement high-pressure triplex pumps available. Designed and built to the highest quality standards, customers count on Giant Pumps products to keep their equipment running. Every design detail of Giant Pumps products is optimized for long-life and reliable performance, making Giant Pumps the most trusted name in high-pressure pumps and systems.