As the operation of the pneumatic valve 2

the sealing surfaces appear flat or cone, by the pneumatic valve opening and closing is plug piece of pneumatic disc. Pneumatic valve make linear movement along the centerline of fluid. Pneumatic valve stem form of exercise, lifting lever ( Pneumatic valve rod and hand wheel lifting) Also have lift rotating lever ( The handwheel with pneumatic valve rod rotating lifting, nut is located in the pneumatic valve) By pneumatic valve used throughout opened only close, not allowed to adjust and throttling. Most used as pneumatic valve tee pneumatic valve body, can make the pneumatic valve installed in a straight line. Logistics through the entrance into the center of the pneumatic valve ( Pneumatic valve core is located in here) Flow direction and then through the pneumatic valve seat here, then a shift and pneumatic valves. As pneumatic valve flow direction by the manufacturer or operating condition and decide, but most of the condition, under the direction of flow is almost always located in the pneumatic valve core. Will mail the letter to the flow direction is placed, a constant however enough to overcome the resistance of the flow for the pneumatic valve core, pneumatic valve is relatively easy to close and fluid pressure and flow change and less. In addition pneumatic valve at the bottom of the core under flow due to the fluid drive pneumatic valve core and easy to open it.