Electric actuator (electric actuator) Electric drive to open or close the valve device. Valves electric device is to achieve program-controlled valves, automatic control and remote control indispensable drive equipment, the movement process by stroke, torque or axial thrust to control the size. Valve actuator operating characteristics and utilization depends on the type of valve, the device specifications and the valve position on the pipeline or equipment. Electric devices are generally composed of the following parts dedicated motor, characterized by strong overload ﹑ large starting torque, moment of inertia, short-term ﹑ intermittent work deceleration mechanism to reduce the motor output speed travel control mechanism to adjust and accurate Control valve opening and closing position of the torque limit mechanism, used to adjust the torque (or thrust) and does not exceed the predetermined value Manual ﹑ electric switching mechanism, manual or electric operation of the interlock opening indicator to display Valve in the opening and closing process where the position according to the type of valve selection Electric actuator Angle travel electric actuator (corner electric actuator output shaft rotation less than a week, that is less than 360 degrees, usually 90 degrees to achieve the valve opening and closing process Control.Electrical actuators according to the installation of the interface is divided into different types of direct connection, the base crank type.Direct connection: refers to the electric actuator output shaft and the stem mounted directly to the form Crank type: Yes Refers to the output shaft through the crank and stem connected to the form of multi-turn electric actuator (corner> 360 degrees) - for gate valves, globe valves, etc. Electric actuator output shaft rotation of more than a week, that is greater than 360 degrees, the general need to be multi-turn valve opening and closing process control. Straight travel (linear motion) - for single seat control valve, Actuator output shaft movement of linear motion, not rotating form.