Unloading valve RQ**-P series

The RQR*-P and RQR*-A valves have not only the normal function of relief valves or safety valves but also the characteristic of freely discharging the pump flow when the set pressure value is reached. In order to assure this condition, the use of an accumulator that guarantees pressure in the circuit is required. The use of a check valve prevents the accumulator from discharging through the valve in the open position. Those valves are made with a balanced shutter main stage that has wide passages for big flows and reduced pressure drops.