Hydraulic control valve arrangement for use in excavator, has shiftable throttle functional unit provided in connection of control pressure connections of pilot valves to container for delimiting resetting speed of control valve

摘要

The arrangement (1) has a control valve (2) for controlling a load, and pilot valves (5a, 5b) provided for operating the control valve and attached to a control pressure supply source and a container. The pilot valves are designed as electrically operatable pressure reducing valves (6a, 6b). A shiftable throttle functional unit (15) is provided in a connection of control pressure connections (8a, 8b) of the pilot valves to the container for delimiting resetting speed of the control valve. The throttle functional unit is integrated into the pilot valves. The load is designed as a double acting hydraulic cylinder, and the control pressure supply source is designed as a feed pump.