The pneumatic smoke butterfly valve is designed with an upper-mounted structure, which reduces the connecting bolts on the valve body itself under high-pressure and large-diameter conditions, enhancing the valve's reliability and overcoming the impact of system weight on the valve's normal operation. Application Scale: The pneumatic smoke butterfly valve is widely used in pipelines of coal chemical, petrochemical, rubber, papermaking, pharmaceutical industries, etc., as equipment for medium分流/合流 or flow direction switching. Parameters: Nominal Diameter of Pneumatic Smoke Butterfly Valve: DN50mm - DN300mm; Nominal Pressure of Pneumatic Smoke Butterfly Valve: PN1.0MPa - 1.6MPa; Temperature Range of Pneumatic Smoke Butterfly Valve: -29℃ - 300℃.