Control valve, also known as the control valve, in the field of industrial automation process control, by accepting the adjustment control unit output control signal, with the power operation to change the media flow, pressure, temperature, liquid level and other process parameters of the final control components. Generally composed of actuators and valves. If the stroke can be divided into three types: pneumatic control valve, electric control valve and hydraulic control valve. According to its function and characteristic, the control valve can be divided into straight and stroke. For the linear characteristics, such as percentage characteristics and parabolic characteristics of three. Regulating valve for air, water, steam, all kinds of corrosive media, mud, oil and other media. English name: control valve, bit number usually FV at the beginning. Regulating valve commonly used classification: pneumatic control valve, electric control valve, hydraulic control valve, self-regulating valve.
Corrosion resistance
As the media is corrosive, try to choose a simple structure of the valve.
Flashing and cavitation are only generated in liquid media. In the actual production process, flash and cavitation will form vibration and noise, shorten the life of the valve, so the choice of the valve should prevent the valve flash and cavitation.
In order to make the control valve work properly, equipped with the actuator to produce enough output to ensure a high degree of sealing and valve opening.