Abstract: The pressure valve is actuated by pressurized fluid and has a housing with a high-pressure space and a low-pressure space separated from each other by a partition. The partition has a bore accommodating a valve member. Axial passages are made in the body of the valve member for establishing alternating communication between the spaces upon the displacement of the valve member. The low-pressure space receives a pressure-relief valve spring-urged away from the partition and movable by the action of pressure selectively supplied to initiate relieving of the high-pressure space. The pressure-relief piston has an axial bore. The pressure valve incorporates an auxiliary piston in the axial bore of the pressure-relief piston and it cooperates with the valve member to displace the latter. The body of the valve member is provided with throttling passages communicating with the axial passages.