Influent stream regulation and control piston device for valve

The utility model relates to an influent stream regulation and control piston device for valve, including piston rod, piston and piston cylinder, wherein the piston cylinder is cylindrical tubular structure, installs on the water conservancy diversion chamber of valve body to with coaxial distribution in water conservancy diversion chamber and intercommunication, piston slidable mounting is in the piston cylinder, and the piston rod both ends are articulated with the valve rod of piston and valve body respectively. This is novel than simple structure, and the drive is nimble convenient, and sealing performance and guidance quality can be good, can help improving the sealing performance and the compressive capacity of valve class equipment on the one hand, and on the other hand helps reducing valve class device driver power to reach the purpose that reduces valve class equipment operating power consumption, herein can destroy the phenomenon because of the too big emergence of pressure medium deformation by the traditional valve class equipment of effectual weaving in addition simultaneously.