Electric device is a driving device that uses electric power to fully open, fully close or control the valve accurately to the position, and can provide linear or rotary motion. Because more and more factories adopt automatic control, including position sensing device, torque sensing device, electrode protection device, logic control device, digital communication module and PID control module. Some special valves require that under special circumstances, the output torque of the actuator required is very large, and our company also provides high-power output motor. Therefore, for some valves with small caliber and small torque, our company has also launched fine and small structure.