Talk about the importance of the pneumatic control valve

The importance of the theory of pneumatic control valve: 1. Pneumatic control valve is a throttling device, belongs to the moving parts, compared with detecting element and transmitter, controller, in the process of control, pneumatic control valve need to constantly change the circulation area of the throttle, the manipulated variable change, to adapt to the load changes or changes in operating conditions. Therefore, the pneumatic - valve valve components of seal, pressure, corrosion, etc. Put forward higher requirements. Seal, for example, may make pneumatic - valve friction increases, pneumatic control valve dead-zone, caused the control system control quality becomes poor. 2. Pneumatic control valve of the strong adaptability. It is installed in a variety of different production process, production process of high temperature, low temperature, high pressure, big flow, operating conditions, such as small flow need pneumatic - valve has the function of various pneumatic regulator can adapt to the requirements of different applications. 3. Inside the valve pneumatic control valve throttle makes energy is consumed, therefore, reduce the energy consumption and reduce the pressure loss of pneumatic control valve, and ensure a better control quality and to reasonable choice between both. Pneumatic - valve material contact medium may contact with the detecting element medium is different, so the corrosion resistance of pneumatic control valve, such as strength, stiffness put forward higher requirements. 4. Pneumatic control valve throttling of fluid at the same time also cause noise, for example, when the pneumatic control valve outlet pressure below the vapor pressure of liquid, cause flash; When the pneumatic - valve downstream of the pressure is higher than that in liquid cavitation was caused when the steam pressure. Pneumatic - valve caused by noise and the design of the pneumatic - valve flow, operating pressure, was accused of dielectric properties and so on. Therefore, lower noise, reduce the pressure loss puts forward higher requirements for pneumatic control valve.