Butterfly valve is made of steel plate welding, which has the advantages of short structure size, light weight, convenient installation, small flow resistance, large flow rate, avoiding the influence of high temperature expansion, and easy operation. The expansion gap between butterfly plate and valve body is large, which can effectively prevent the stuck phenomenon caused by thermal expansion and cold contraction. Pneumatic ventilation butterfly valve is a kind of non-closed butterfly valve, which is widely used in industrial pipelines such as gold treatment, normalization, power, building materials, mines and so on. It can control or regulate medium gas.
Butterfly valve is a kind of non-hermetic butterfly valve. It is widely used in pipelines with temperature of medium less than 300 C and nominal pressure of 0.1Mpa in the production of building materials, metallurgy, mines and electric power. It is used to connect, open and close or regulate the medium volume. As a gas medium to regulate the flow or cut off the pipeline control device. Valves of this type shall generally be installed horizontally in pipes.