SID (I) series intelligent electric valve actuators, adopt the advanced MCU chip, high-precision sensor, set the location transmitter, the proportion of controllers in one. It does not have openings, and finish adjusting the calibration of various parameters such as valve position limit, twisted torque setting, the valve position and closing the operation of opening and closing valve by the panel keyboard. Through intelligent controller receives dry contact switch signal or AC220V voltage signal, intelligent switch control the actuator's on / off. The series is suitable for the opening and closing of the valve, is the essential drive for the remote control, centralized control and automatic control of the valve. It has the characteristics of full-featured, reliable performance, small size, light weight, easy to maintain and so on, and widely used in metallurgy, petroleum, chemical, paper, sewage treatment and other industries.