Our high vacuum butterfly valve is suitable for use in non-corrosive saturated steam at low vacuum pipelines, serving as a closed circuit equipment. The high vacuum butterfly valve is a type of sealed butterfly valve. The sealing at both ends of the valve is achieved by a pressure of 0.25 MPa, ensuring no leakage at the sealing points. Its structure is in the form of double valve seats, and the gap between the two seats as well as at the valve end are sealed by a combination of rubber gasket and pressurized water (with a pressure value of 0.25 MPa). If the user requires, an electric heating device can be added to the valve body when it is closed.