Stainless steel pneumatic butterfly valves are high-performance, long-life butterfly valves primarily composed of a pneumatic actuator and a stainless steel butterfly valve body. Both the valve body and disc are fabricated from stainless steel, offering characteristics such as high-temperature resistance, corrosion resistance, and high-pressure tolerance. Stainless steel pneumatic butterfly valves can be categorized by connection type into flanged, wafer-type, or welded configurations. They are suitable not only for on/off two-position shut-off control but can also be fitted with valve positioners to achieve proportional regulation of parameters such as medium flow rate, temperature, and pressure. These valves find extensive application in pipelines requiring high-temperature, high-pressure, cryogenic, or fire-resistant conditions for shut-off or regulating purposes.