Production tree electrohydraulic control valves list electricity low pressure switching -over valve under deep sea water

The utility model relates to a production tree electrohydraulic control valves list electricity low pressure switching -over valve under deep sea water, including the main valve, pilot valve and electro -magnet, wherein the pilot valve is installed and is communicate at the main valve surface and with the main valve, the electro -magnet is installed on the pilot valve, and be connected with the actuating mechanism of pilot valve, wherein the main valve includes the valve body, the end cover, the piston bush, drive?RAM, the regulating piston, the driving spring, the spring holder, the supporting seat, push rod and ceramic ball, wherein a valve cavity is arranged in the valve body, valve pocket and the coaxial distribution of valve body, its valve pocket is in addition through water conservancy diversion way and pilot valve and the outside intercommunication of valve body, the end cover symmetric distribution is in valve pocket both ends department, the piston bush, drive?RAM, the regulating piston, the driving