Pneumatic valve with a circular disc with the valve opening and closing of orange rotating done to enable the operation of pneumatic valves to achieve the main shut-off valve to make use of, or can also be designed to have a regulating valve and regulate the function of segment, butterfly in low voltage high current diameter pipe on the use of more and more. Pneumatic butterfly Category: Stainless steel pneumatic valve, pneumatic butterfly hard seal, soft seal pneumatic valve, pneumatic valve steel.