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Featured Image for 22665

This is a flow-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 does not “trap” pressure, so it eliminates the need for an easy start valve and virtually eliminates the “kick-back” (that occur with pressure-actuated type of unloaders) upon start up.

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

Specification US Metric
Minimum Flow1.3 GPM5 L/min
Maximum Flow13.2 GPM50 L/min
Maximum Pressure7250 PSI500 bar
Tempurature Rating140 °F60 °C
Inlet Port1/2" FBSP
Outlet Port1/2" FBSP
Bypass Port1/2" MBSP
Weight9 lbs.4.1 kg
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.
Valve Cone Repair Kit – Part #09757
14 07913 O-Ring 1
15 04073 Bypass Valve Spring 1
16 22711 Valve Cone 1
17 22726 Restrictor 1
18 04074 Restrictor 1
19 04075 Valve Cone 1
20 04076 Pressure Spring 1
22 22727 O-Ring 1
22A 04261 Seal Edge Ring 2
28 06487 O-Ring 1
Seal Repair Kit – Part #09500A
6 07035 O-Ring 1
7 04067 Support Ring 1
8 22704 O-Ring 1
9 04068 Support Ring 1
12 04230 Seal Edge Ring 1
22 22727 O-Ring 1
22A 04261 Seal Edge Ring 2
23 04077 Support Ring 1
24 07212 O-Ring 1
26 22719 O-Ring 1


Documents open in new window/tab.

  • Giant Industries Limited Warranty
  • 22665 Literature
  • How the 22665 Unloader Works


Sample Pump

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