It is mainly applicable to waterworks, power plants, steel smelting, paper making, chemical, food, and other systems

The open-closed piece of the valve is a round-disk butterfly board and, by rotating around the axis  of its own inside of the valve body, carries out the open-close or adjusting function. It features:

 1)Simple structure, small volume and light weight;

 2)Quick open-close, labour saving and small fluid resistance;

 3)Good adjustable performance, can be adjusted flexibly within 0-90°.