Introduction of the composition and working principle of the diaphragm 2)

the pneumatic diaphragm valve, corrosion resistant, corrosion resistant lining diaphragm, instead of using the regulating pneumatic valve diaphragm assembly motion. Pneumatic valve body material of diaphragm is cast iron, cast steel or cast stainless steel, corrosion or wear resistant materials, rubber and ptfe membrane materials of all kinds of lining. Corrosion resistant lining of the diaphragm, acid, alkali and strong corrosive medium of the appropriate adjustment.
diaphragm has simple structure, small fluid resistance, flow rate is larger than a size of pneumatic valves and other types of ability; Without leakage, it can be used in high viscosity and the media self-discipline of suspended particles. Divided into isolated media and stem cell, there is no leakage will not fill medium. However, the limitation of diaphragm and lining material, pressure, temperature difference, generally only applies to the nominal pressure. MPa and ℃.
diaphragm characteristic flow characteristic is close to fast, go on about % of linear, little change in % of the traffic. Pneumatic diaphragm valve can still connected to the feedback signal, the limiter and positioning device and other devices in the form of, in order to meet the self control, project control or regulate traffic demand. Pneumatic diaphragm valve feedback signal using non-contact sensor technology. The product film advance cylinder, replace the piston cylinder, piston ring is easy to eliminate the disadvantages of leakage caused by, not recommended to open and close the pneumatic valve damage. When air supply failure, they will still be able to open and close the pneumatic valve handwheel.