The electric valve consists of two parts, part electric actuator and part valve. The valve switch power comes from the electric actuator. Because the electric valve is more convenient to use, it can be used with the power supply, compared with the amount of automatic control valves compared with other driving methods. The working principle of electric valve is that the motor to produce linear motion and angular rotation motion under the action of electric signal.

Electric valve mainly has two switch type and regulation type according to the equipped actuator. Switched electric valve is used for opening and closing in the working condition pipeline, and the main function is to cut off or turn on the pipeline medium. The regulating electric valve can accept the signal from the control system, and adjust the opening of the valve to achieve the purpose of regulating the flow and pressure of the pipeline medium.