Industrial automation control system of the pneumatic control valve by receiving signal

Industrial automation control system of the pneumatic control valve by receiving signal, Such as: 4 ~ 20 ma) To drive change valve core and valve seat between the cross-sectional area of the pipeline medium size control of process parameters such as flow rate, temperature, pressure and etc. Automated regulating function. Pneumatic control valve of the common control circuit includes three main parts, the first part is the sensitive element, it is usually a transmitter. It is a device used to measure the modulated process parameters, the parameters such as pressure, level, or temperature.