The ventilation butterfly valve is driven by an electric motor to power the actuator, allowing the disc plate to rotate freely within a 90° range to achieve the purpose of opening, closing, or regulating the flow of the medium. Fluorine-lined butterfly valves and rubber-lined butterfly valves, as components used for pipeline system switching and flow control, have been widely applied in many fields such as petroleum, chemicals, metallurgy, hydropower, etc. In the known butterfly valve technology, the sealing form mostly uses a sealing structure, with sealing materials including rubber and polytetrafluoroethylene.