Product overview: plastic butterfly valve is light in operation, tight in sealing performance and long in service life; it can be used to cut off or regulate flow quickly, and is suitable for occasions requiring reliable sealing and good in regulating characteristics. The valve body adopts split type, and the sealing at both ends of the valve shaft is controlled by adding fluororubber to the rotating base surface between the butterfly plate and the valve seat: to ensure that the valve shaft does not contact with the fluid medium in the cavity. It is widely used in the transportation of liquid and gas (including steam) in various types of industrial pipelines. It has severe corrosive media, such as sulfuric acid, azolic acid, phosphoric acid, nitrogen, strong alkali, aqua regia and other highly corrosive media.