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These accessories are related to a pop-off valve, but are made for more repeated use. They are pressure relief valves which protect the pump and other high pressure components from over-pressurization. After removing the dangerous high pressure from the system, they are able to re-set. Like the pop-off valve, they should be used whenever a pressure actuated unloader or pressure actuated regulator is used as these devices can eventually fail over time. They are designed to relieve flow up to 624 GPM (2361 L/min) and are capable of pressures up to 58,000 PSI (4000 Bar). Materials available are brass and 316 stainless steel.

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

Specification US Metric
Maximum Flow21.1 GPM80 L/min
Min Pressure406 PSI28 bar
Max Pressure4060 PSI280 bar
Maximum Intermittent Pressure310 bar
Permissible Pressure4500 PSI
Permissible Pressure310 bar
Intermittent Temperature194 °F90 °C
Continuous Temperature158 °F60 °C
Inlet Port1/2" BSP
Outlet Port1/2" BSP
Bypass Port1/2" BSP
Weight1.9 lbs.0.84 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.
Repair Kit – Part #09788
9 04208 Stem Seal and O-Ring 1
10 04217 O-Ring 1
11 04216 Back-Up Ring 1
13 04482 O-Ring 1
14 04483 Piston 1
15 04485 Seat 1
17 08831 O-Ring, Viton 1
18 04484 O-Ring 1
20 04482 O-Ring 1


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  • Giant Industries Limited Warranty
  • 22106-51 Literature


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