Verify the system is isolated, depressurized, and locked out
Confirm the PRV type, setpoint range, and manufacturer instructions
Check inlet and outlet pressures with calibrated gauges
Loosen the locknut or seal on the adjustment screw
Turn the adjustment screw clockwise to increase set pressure
Turn the adjustment screw counterclockwise to decrease set pressure
Make small adjustments only
Recheck the set pressure after each adjustment
Restore system pressure and confirm valve operation
Tighten the locknut or reinstall the seal after setting is correct
Record the final set pressure and adjustment date