The working principle and working environment of electric valve

What is an electric valve?

The electric valve is simply to control the valve with an electric actuator, so as to realize the opening and closing of the valve. It can be divided into two parts, the upper part is the electric actuator, the lower part is the valve. Also called air conditioning valve.

The electric valve is a high-end product in the automatic control valve, which can not only realize the switch function, but also realize the valve position adjustment function. The stroke of the electric actuator can be divided into: 90° Angle stroke and straight stroke, and special requirements can also meet the full stroke of 180°, 270° and 360°. The electric actuator with angular stroke is used with the valve with angular stroke to control the flow of the pipeline within 90°. The straight stroke electric actuator is used with the straight stroke valve to realize the up and down action of the valve plate to control the flow of the pipeline.

Technical principle

The electric valve is usually connected by the electric actuator and the valve, and becomes an electric valve after installation and debugging. The electric valve uses electric energy as the power to switch on the electric actuator to drive the valve and realize the switching and adjusting action of the valve. So as to achieve the purpose of switching or adjusting the pipeline medium.

The drive of the electric valve is generally driven by the motor, and the opening or closing action requires a certain amount of time to complete the simulation, which can be adjusted. Relatively resistant to voltage shock. Solenoid valve is fast opening and fast closing, generally used in small flow and small pressure, requiring a large switching frequency; Electric valve vice versa. The opening of the valve can be controlled, and the state is open, closed, half-open and half-closed, which can control the flow of the intermediate quality of the pipeline and the solenoid valve can not meet this requirement.

What are the types of electric valves

1, the electric valve according to the valve position function can be divided into: switch type electric valve and regulating electric valve;

2, according to the valve position form can be divided into: electric ball valve and electric butterfly valve;

3, according to the shape of the valve body can also be divided into: ordinary electric valve and micro electric valve;

4, the electric valve is usually switching type and regulating type;

5, according to the wiring is also divided into three wire and two wire system, large caliber is mostly three wire system, small caliber will have two lines and three wire system.

Electric valve working environment

In addition to the pipe parameters, the electric valve should pay special attention to the environmental conditions of its work, because the electric device in the electric valve is a mechanical and electrical equipment, and its working condition is greatly affected by its working environment. Under normal circumstances, the working environment of the electric valve has the following types:

1. Indoor installation or outdoor use with protective measures;

2, outdoor installation, wind, sand, rain, sunlight and other erosion;

3, with flammable, explosive gas or dust environment;

4, hot and humid zone, dry tropical environment;

5, the temperature of the pipeline medium is as high as 480℃ or more;

6, the ambient temperature is below -20℃;

7. Easy to be flooded or immersed in water;

8, with radioactive material (nuclear power plant and radioactive material test equipment) environment;

9, on the ship or dock dock (with salt spray, mold, damp) environment;

10, with violent vibration occasions;

11, prone to fire occasions;