OPERATING DEVICE FOR DIRECTIONAL CONTROL VALVE

摘要

An operating device for a directional control valve, comprising a meter-in control valve (3) for establishing or intercepting communication of a hydraulic pressure source (1) with one chamber (5) of an actuator (4) and a meter-out control valve (7) for establishing or intercepting communication of the other chamber (6) of the actuator and a tank (8), characterized in that the operating device is provided with an electromagnetic valve (13) for meter-in use which supplies pressure oil for switching the meter-in control valve and an electromagnetic valve (12) for meter-out use which supplies pressure oil for switching the meter-out control valve, and the input pressure to one of the meter-in electromagnetic valve and the meter-out electromagnetic valve is made the output pressure from the other.