Do you really know what a pneumatic control valve is? If it is easy to understand, the pneumatic control valve is composed of a pneumatic actuator and a valve. The pneumatic actuator receives the input source data signal, causing relative thrust, making the push rod offset, and promoting the gate valve posture. The valve refers to a part of the oil circuit board component connected with the pipeline, which receives the push rod thrust of the electric actuator, changes the valve stem offset, and then changes the gate valve opening, and finally controls the change of the total flow of fluid mechanics. Pneumatic control valves can be divided into straight travel arrangements and angular travel arrangements according to their travel arrangements. According to their structural characteristics, they can be divided into direct connected single seat valves, direct connected double seat valves, high pressure valves, angle valves, sleeve valves, diaphragm valves, butterfly valves, axial force rotary valves, etc. Among them, the direct valve is more common, the leakage of single seat valve is small, but the pressure difference between the left and right before and after the valve cannot be large, while the double seat valve is just the opposite. High pressure valves are suitable for accurate measurement of high negative pressure and high differential pressure materials. However, under the condition of high differential pressure, hydromechanics has serious erosion and cavitation of raw materials. Generally, the materials of valve cores and high pressure gate valves should be considered to improve their service life. Angle valves can be used in the hydrodynamic operation of high pressure difference, high viscosity, pneumatic control valves containing suspended solids and particulate chemicals. Diaphragm valve is more suitable for the operation of strong corrosive substances such as strong alkali and acid. Butterfly valve is suitable for gas materials with large total flow and low pressure difference. The sleeve valve adopts the balanced valve core structure, which has the characteristics of low noise, and is the first valve widely used.

(7) As for the installation of the electrical part of the on-off butterfly valve, it needs to be carried out in strict accordance with the construction requirements of relevant electrical equipment.