Valve arrangement for several hydraulic consumers

摘要

In hydraulically actuated directional control valves for several consumers, the associated pilot-control valves are constructed as pressure-reducing valves with connections to a control-pressure line and a tank line. The tank line can be connected via a pressure-control valve to the tank or to the control-pressure line. The pressure-control valve is actuated by the pressure difference between the pump pressure and the load pressure so that an increased pressure is introduced into the tank line in a controlled manner if there is insufficient supply to the consumer during a falling pressure difference. Thus the pressure level in the pilot-control pressure lines leading to the directional control valve increases so that the directional control valves controlled to the greatest extent are retracted in order to choke the feed to the associated consumers.