The types and working principles of electric valve

The so-called electric valve, as its name implies, is driven by the power to open and close the valve. It is mainly composed of two parts, the upper part is the electric actuator, and the lower part is the valve.In the industrial process, it is used to control the movement and flow of various fluids, such as water, oil, chemical liquids, etc,the parameters based on are temperature, pressure, flow, etc.Electric valve is a kind of automatic control valve widely used in recent years. With its stable reliability and multiple control functions, it meets the working condition requirements that most ordinary valves cannot use, and has become an indispensable control equipment in the process pipeline.

The electric valve has simple structure and long service life. It is applicable to almost all media and can greatly reduce the labor intensity of operators.It is applicable to the position where the equipment can not be operated manually or it is difficult to get close to it, and the valve can be operated from a distance, and the height of the equipment is not restricted.

The types and classifications of electric valves:

1.Electric valves are generally divided into two categories according to different actuators, one is angular stroke, the other is straight stroke,the angle stroke electric valve rotates 90 degrees to achieve the opening and closing of the valve,the straight stroke is to realize the up and down movement of the valve plate,which is usually used on equipment with high degree of automation.

2.It can be divided into switch type and regulating type, intelligent type and explosion-proof type according to functions;The switch type is fully open and fully closed, and the regulating type can control any opening of the valve to achieve the function of regulating the flow.

3.It can be divided into common electric ball valve, electric butterfly valve, electric control valve, solenoid valve, electric gate valve, electric globe valve, etc. according to the valve position form, which can be applied to various occasions.

4.According to the shape of valve body, it can be divided into ordinary electric valve and micro electric valve.

The working principle of electric valve:

The electric valve is connected by the electric actuator and the valve,after installation and commissioning, the valve is driven by the power supply to realize the opening and closing of the valve,so as to achieve the purpose of switching or regulating the pipeline medium.The opening of the electric valve can be controlled, and the states are open, closed, half open and half closed,which can control the flow of the medium in the pipeline, but the solenoid valve can not meet this requirement.

The solenoid valve is a kind of electric valve, which uses the magnetic field generated by the solenoid coil to pull the valve core, thus changing the on-off of the valve body,when the coil is powered off, the valve core will return under the pressure of the spring.

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