The ZAZ type regulating valve consists of two parts: an electric actuator and a regulating valve. The regulating valve has two forms: a single seat and a three-way. The electric actuator bracket is connected to the regulating valve cover with a nut, and the output shaft of the actuator is connected to the valve core and valve stem of the regulating valve as a whole with a clamp block. The regulating valve has two types of functions: electric open and electric close. The initial position of the electric open valve is closed, and after being energized, the valve is opened; The initial position of the electric shut-off valve is open, and after being energized, the valve is closed. A three-way valve, due to the simultaneous opening and closing of the valve, has no distinction between electric opening and electric closing. But because it indicates whether the initial position is for the horizontal pipeline to open or for the vertical pipeline to open. Its principle: The actuator receives switch signals from the regulating instrument, and the output shaft drives the valve core to control the flow of the regulated medium.