The utility model has the advantages of small size and light weight, and can be used as a cutting off and regulating flow device in various medium pipelines. Through the use of different materials of the valve plate and sealing seat, as well as the plate, the shaft through the pin connection can be used for more severe conditions, such as desulfurization, vacuum, desalination systems, etc.. Lug type butterfly valve can be achieved on the downstream pipeline and equipment online repair, and the valve can be achieved on the downstream pipeline and equipment online repair, and the valve can be installed in the pipe end as the exhaust valve.
This valve is used in petroleum, chemical, food, medicine, papermaking, shipbuilding, hydropower, water supply and drainage, metallurgy, energy and other system pipeline, in a variety of corrosive, non corrosive gas, liquid, semi liquid and solid powder pipe and containers and the closure as a regulating equipment to use