Our high vacuum butterfly valve is suitable for use in low vacuum pipelines without corrosion in saturated steam. It is used 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. The gap between the two seats and at the valve end are sealed by a rubber joint combined with pressurized water (pressure value 0.25 MPa). If the user requires, an electric heating device can be added to the valve body when it is closed.