Vacuum butterfly valve is suitable for environmental protection of producer, coal gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical training and power generation. It is used for the activities of conditioning and cutting off media on the pipelines that transport various corrosive and non-corrosive fluid media in engineering systems such as building water supply and drainage.
The gate valve is an opening and closing gate. The movement direction of the gate is straight with the direction of the fluid. The gate valve can only be fully opened and fully closed. '. To improve its manufacturability and compensate for the error of the sealing surface viewpoint during the processing, this kind of gate is called an elastic gate.
When the gate valve is closed, the sealing surface can only rely on the medium pressure to seal, that is, only relying on the medium pressure to press the sealing surface of the gate to the valve seat on the other side to ensure the sealing of the sealing surface, which is self-sealing. Most gate valves are forced to seal, that is, when the valve is closed, the gate should be pressed against the valve seat by strong external force to ensure the tightness of the sealing surface.
