Description of the design and manufacture of the structure of the vacuum butterfly valve

The vacuum butterfly valve is designed and manufactured by adopting a new structure of medium-line disc and short-structure steel plate welding. It is compact in structure, light in weight, easy to install, small in flow resistance and large in flow volume. It prevents the influence of high temperature expansion and is easy to operate. There are no connecting rods, bolts, etc. in the body, and the work is firm and the service life is long. It is capable of multi-station devices and is not affected by the flow of media.

As a component used to complete the on-off and flow control of pipeline systems, butterfly valves have been widely used in many fields such as petroleum, chemical, metallurgy, and hydropower. Among the well-known butterfly valve skills, the sealing method is mostly a sealing structure, and the sealing material is rubber, polytetrafluoroethylene or the like. Due to the constraints of structural characteristics, it is not suitable for industries such as high temperature resistance, high pressure, corrosion resistance and wear resistance.

A relatively advanced butterfly valve is a three-milking metal hard sealing butterfly valve. The valve body and the valve seat are connected members, and the valve seat sealing surface layer is welded with a temperature-resistant and corrosion-resistant alloy material. The multi-layer soft stack sealing ring is fixed on the valve plate. Compared with the traditional butterfly valve, the butterfly valve has high temperature resistance, easy operation, no friction in opening and closing, and the seal is compensated with the increase of the torque of the transmission structure when closing, and the butterfly valve is improved. Sealing performance and the advantages of extended service life.