Control valve device controls direction and speed of motion of load and has blockage element actuated in throughflow direction by actuator when load line connected to container

摘要

The device has a control valve for load direction and speed with a seat valve blockage element in each load line with a control pressure surface acting towards a blocking position and subject to load pressure and a spring and a surface acting towards a throughflow position subject to pressure between the control valve and blockage element. The blockage element is actuated in the throughflow direction when the load line is connected to a container. The device has a control valve for controlling the direction and speed of motion of the load with a blockage element in each load line leading to the load for cut-off without leakage oil. The blockage element (15a, 15b) is a seat valve with a control pressure surface acting in the direction of a blocking position and subjected to load pressure and a spring and a control pressure surface acting in the direction of a throughflow position subjected to the pressure between the control valve and blockage element. The blockage element is actuated in the throughflow direction by an actuator when the load line (8a,8b) is connected to a container (11).