How To Set Dual, Parallel Pressure Control Valves,
Pressure Relief Valve and Compensator
Execute a full lockout/tagout of the power source and de-energize and verify the hydraulic system(s). Failure to comply could result in severe injury, death, and/or substantial property damage.
Back both the pressure relief valve's and the pump's pressure compensator adjusting screws all the way out (lowest possible pressure).
Never back pressure or flow-adjusting screws out while there is pressure in the system, or if the pump is operating. If the adjusting screw comes out of the housing, it could cause severe injury, death, or substantial property damage.
Install a pressure gauge in parallel with the transmission line at the outlet port of the pump.
Install a flow meter in series with the transmission line at the outlet port of the pump.
Set the flow to the recommended flow rate (*optional).
Start the prime mover.
While watching the pressure gauge, override the pressure compensator by turning the adjusting screw all the way in.
Set the pressure relief valve at the recommended pressure setting.
Back the pressure compensator adjusting screw out to the recommended pressure setting.
Not all variable volume pumps are equipped with a mechanical flow adjusting screw.
Waiver of Liability
The Fluid Power Safety Institute does everything possible to ensure that the information and drawings contained in this notice are accurate, and the suggested procedures are deemed safe and reliable.
However, these are general recommendations only and might not be applicable to all situations.
You MUST have your engineering department in conjunction with your safety department read these recommendations and make the necessary changes for your application.
The Fluid Power Safety Institute is not responsible for actions taken by untrained and/or unauthorized persons.
Trained, authorized persons only should do ALL fluid power system service, repair, and troubleshooting.