It is a hydraulic operated valve with solenoid valve as guide valve. It is commonly used in the automatic control of water supply and drainage and industrial system, with accurate and fast control response. According to the electrical signal, the pipe road system can be opened and closed remotely to realize remote operation. It can replace gate valve and butterfly valve for large electric operating system. The closing speed of the valve can be adjusted to close smoothly without pressure fluctuation. The valve has the advantages of small volume, light weight, simple maintenance, convenient use, safety and reliability. The solenoid valve can be AC 220V or DC 24V, and can be normally open or normally closed according to various occasions.