Electric actuator control mode is divided according to feedback and regulated. Regulated by an electric actuator servo amplifier and feedback executing agencies, it is possible to compare the (closed-loop control) to change the output shaft of the stroke control signal system and the feedback signal on the output shaft position, so that the output signal is proportional to the relationship. Feedback actuator servo motor, reducer and position transmitter which is able to operate in conjunction with the electric realize remote operation of valves or other regulatory agencies. DKZ series electric actuator is a terminal industrial process measurement and control system, control system, which can be converted into a control signal system, the angular displacement of the output shaft, linear displacement, position control valves and other parts of the closure or other regulatory agencies, the accused according to the system requirements state media work. DKZ electric actuator is DDZ-Ⅱ electric unit in the instrument cluster execution unit. It includes actuators and servo amplifier two independent whole, to power for the power to accept a unified standard DC signal 0 ~ 10mA, this input signal into a corresponding Cartesian displacement, automatically operated control valve, complete automatic adjust task. DKJ electric actuator using the automatic adjustment system, equipped with DFD-09 electric actuator can be achieved manually adjust the system to automatically (automatic to manual) automatically switches to worry.