To provide a small valve control unit kept in a small space without failing in severe environment like a marine vessel.

Each of at least two valves is operated by each hydraulic actuator which is controlled by a control device. Each control device is provided with a motor 7, a hydraulic pump 10, a liquid reservoir container and an electronic assembly 9 for local control and monitoring of the control device. The electronic assembly 9 is provided for the local control of the valve, particularly for manual control.