The GAIRUI Cast Steel Lug Eccentric Butterfly Valves are widely used not only in petroleum, gas, chemical industry, water treatment and other general industries, but also in cooling water systems of thermal power stations. Used in the gas pipeline in the sulphuric acid industry: the inlet of the blower before the furnace, the inlet of the relay fan, the electric mist eliminator series and the connecting valve, the S02 main blower outlet, the converter regulation, the preheater exit and exit and other adjustment and cut-off air volume. The sulfur, conversion and dry sucking section used in sulphur making acid system is the first brand of the sulphur acid plant, which is considered to be a butterfly valve with good sealing performance, light operation, vice corrosion, high temperature resistance, convenient operation, flexible operation and safe and reliable use.