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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 knob 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.  This unloader design requires a partial bypass to operate.

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

Specification US Metric
Maximum Flow6.6 GPM25 L/min
Min Pressure0 PSI0 bar
Max Pressure4000 PSI275 bar
Temperature Rating194 °F90 °C
Inlet Port3/8" FNPT
Bypass Port3/8" FNPT
Discharge Port with Injector3/8" MNPT
Discharge Port with Injector3/8" FNPT
Weight2 lbs.0.91 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.
ITEM# PART# DESCRIPTION Qty.
Full Repair Kit – Part #09321
4 07770 O-Ring 1
5 08553 Support Ring 1
6 07915 O-Ring, Piston 2
8 08691 Piston 1
9 22659 O-ring 1
10 08563 Seat 1
17 08559 Support Ring 1
18 12326 O-Ring 1
19 07913 O-Ring 1
23 08564 O-Ring 1
Seal Repair Kit – Part #09322
4 07770 O-Ring 1
5 08553 Support Ring 1
6 07915 O-ring, Piston 2
9 22659 O-Ring 1
17 08559 Support Ring 1
18 12326 O-Ring 1
19 07913 O-Ring 1
23 08564 O-Ring 1

Literature

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  • Giant Industries Limited Warranty
  • 23290 Literature

Materials

Sample Pump

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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.

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