This is a pressure-actuated unloader that is designed for any pump that fits within the flow and pressure range of the unloader.  The unloader regulates the flow in the system and maintains system pressure via an adjustable hand-wheel that controls the amount of tension on a pressure spring.  When no flow is going out the outlet port, all flow is diverted to the bypass port at virtually no pressure.  The unloader is capable of handling one or more shut-off guns and should be run with no bypass (if the full flow from the pump is going through the unloader).  It actuates at around 10% above the system pressure.

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

  • Giant Industries Limited Warranty
  • 22760L Literature


U.S. Metric
Flow 0.03 – 8 GPM 0.1-30 L/min
Pressure (Maximum) 600 PSI 40 bar
Continuous Temperature 160 ºF 70 ºC
Inlet 3/8″ FNPT
Outlet 3/8″ FNPT
Bypass 1/4″ FNPT
Weight 2.1 lbs 0.96 kg


Full Repair Kit – Part #09108
3 06015 O-Ring 1
6 12305 Guide Ring 1
7 12018 Guide Ring 2
8 11507 O-Ring 2
10 12307 O-Ring, Piston 1
11 12308 Backup Ring. Piston 1
13B 12326 O-Ring 1
15 12007 O-Ring 2
21A 12351 Kick Back Valve, Spring Retainer 1

Repair Kits Available

The repair kits listed to the right are available for this pump. If you need further information about these repair kits, or have questions about other specific parts for your pump, please contact you local Giant distributor or contact Giant customer service.

Service & Repair

Giant provides service on each pump and accessory that we sell. Many basic repair procedures are covered in the Giant repair manual. For all other questions on service or repair needs please contact your local Giant distributor.