These 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, but should eventually be replaced as frequent use minimizes their effectiveness.  In particular, 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 10 GPM (38 L/min) and are capable of pressures up to 5000 PSI (345 Bar).  Materials available are brass and stainless steel. 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.

22530A
This valve is designed to relieve the system of higher than normal pressures.  It is normally set at 15-20% above the normal operating pressure.  Once the pressure falls below the set point, it will automatically re-set.  It will operate in this manner for a limited number of times.
22530A-5100
This valve is designed to relieve the system of higher than normal pressures.  It is normally set at 15-20% above the normal operating pressure.  Once the pressure falls below the set point, it will automatically re-set.  It will operate in this manner for a limited number of times.
22531A
This valve is designed to relieve the system of higher than normal pressures.  It is normally set at 15-20% above the normal operating pressure.  Once the pressure falls below the set point, it will automatically re-set.  It will operate in this manner for a limited number of times.
22531A-5100
This valve is designed to relieve the system of higher than normal pressures.  It is normally set at 15-20% above the normal operating pressure.  Once the pressure falls below the set point, it will automatically re-set.  It will operate in this manner for a limited number of times.
22532A
This valve is designed to relieve the system of higher than normal pressures.  It is normally set at 15-20% above the normal operating pressure.  Once the pressure falls below the set point, it will automatically re-set.  It will operate in this manner for a limited number of times.
22532A-5100
This valve is designed to relieve the system of higher than normal pressures.  It is normally set at 15-20% above the normal operating pressure.  Once the pressure falls below the set point, it will automatically re-set.  It will operate in this manner for a limited number of times.
22533A
This valve is designed to relieve the system of higher than normal pressures.  It is normally set at 15-20% above the normal operating pressure.  Once the pressure falls below the set point, it will automatically re-set.  It will operate in this manner for a limited number of times.
22533A-5100
This valve is designed to relieve the system of higher than normal pressures.  It is normally set at 15-20% above the normal operating pressure.  Once the pressure falls below the set point, it will automatically re-set.  It will operate in this manner for a limited number of times.
22550A
This valve is designed to relieve the system of higher than normal pressures.  It is normally set at 15-20% above the normal operating pressure.  Once the pressure falls below the set point, it will automatically re-set.  It will operate in this manner for a limited number of times.
22560A
This valve is designed to relieve the system of higher than normal pressures.  It is normally set at 15-20% above the normal operating pressure.  Once the pressure falls below the set point, it will automatically re-set.  It will operate in this manner for a limited number of times.
22565A
This valve is designed to relieve the system of higher than normal pressures.  It is normally set at 15-20% above the normal operating pressure.  Once the pressure falls below the set point, it will automatically re-set.  It will operate in this manner for a limited number of times.
22568
This valve is designed to relieve the system of higher than normal pressures.  It is normally set at 15-20% above the normal operating pressure.  Once the pressure falls below the set point, it will automatically re-set.  It will operate in this manner for a limited number of times.
ACCESSORIES
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.