This butterfly valve with three eccentric multi-level metal sealing structure, no mechanical abrasion, can achieve zero leakage, good sealing function, is used in the petroleum, chemical, metallurgy, electric power, food, pharmaceutical, water supply and drainage, gas delivery pipes of different media such as for regulating the flow of fluid, cutting off or switching on the best device.

The choice of different materials, are suitable for water, sewage, water, air, steam, gas, combustible gas, corrosive medium, oil and food and other media, the highest working temperature can reach 600 ℃.