What is the principle of automatic valve?

An automatic valve is a device that uses an electric, pneumatic, hydraulic, or electromagnetic drive to control the valve. Its core principle is to use the combination ofa  sensor, valve actuator, and control module, and use the sensor signal transmission to make the control module issue instructions, and then operate the switch of the valve actuator.

Specifically, the working principle of the automatic valve can be divided into the following types:

Electric drive: The motor drives the valve's opening and closing, which is suitable for occasions requiring precise control.

Pneumatic drive: Using compressed air as a power source to drive the valve actuator is suitable for occasions requiring rapid response.

Hydraulic drive: The valve is driven by the hydraulic system, which is suitable for occasions requiring large thrust.

Electromagnetic drive: The valve is driven by electromagnetic force, which is suitable for small occasions or occasions requiring rapid switching.

In addition, the automatic valve can also realize the automatic adjustment of parameters such as flow, pressure, and temperature according to different control requirements. For example, the self-operated regulating valve uses the feedback signal (such as pressure, pressure difference, or temperature) at the valve output end to be transmitted to the actuator through the signal tube, driving the valve disc to change the valve opening, thereby achieving the purpose of regulating pressure, flow, and temperature.

In general, the automatic control valve realizes efficient, precise, and reliable control of the valve through automatic control technology and is widely used in automatic control systems in industries such as petroleum, chemical, electric power, and heating.