Application of control valve

Electric control valves are used in the fields of industrial automation systems such as electric power, chemical industry, metallurgy, environmental protection, water treatment, light industry and building materials.

The electric butterfly valve is used in the industrial process automatic control system of food, environmental protection, light industry, petroleum, chemical industry, water treatment, municipal engineering, paper making, electric power, water treatment and other industries.

The difference between electric regulating valve and electric butterfly valve is that the working principle is different, the characteristics are different and the shortcomings are different.

First, the working principle is different.

1. Electronic control valve: The electronic control valve drives the valve to change the cross-sectional area between the valve core and the valve seat by receiving the signal from the industrial automation control system (such as 4~20mA), so as to control the process parameters such as the flow rate, temperature and pressure of the pipeline medium. Realize the automatic adjustment function.

2. Electric butterfly valve: After the electric butterfly valve is connected and debugged by the adjustable electric actuator and the valve stem; As the driving force, electric energy drives the hard seal butterfly valve valve plate to make local rotation motion of 0 ~ 90 degrees. Receive 4~20mA signals from industrial automation control system, and accurately control the valve opening, so as to realize the adjustment and control of different process parameters such as flow, temperature and pressure.

Second, the characteristics are different.

1. Electric control valve: The electric control valve has the characteristics of small volume, light weight, simple connection, large flow and high adjustment accuracy.

2. Electric butterfly valve: Electric butterfly valve has the characteristics of small volume, light weight, reliable performance, simple matching and large circulation capacity, and is especially suitable for clean liquids and gases.

Third, the shortcomings are different.

1, electric control valve: the internal heat generated by the operation of the electric control valve will lead to thermal protection and make the control valve stop working; Because the motor must go through multi-stage deceleration to output torque, the running speed is not very fast, which is not suitable for some occasions that need rapid opening and closing; Because there are many moving parts, it is relatively easy to cause faults, especially under the condition of frequent adjustment.

2. Electric butterfly valve: The working pressure and temperature range of electric butterfly valve are small; Poor sealing.

Baidu encyclopedia-electric regulating valve

Baidu encyclopedia-electric butterfly valve