http://www.zhonghe-valves.com/butterfly-valves/ It is usually installed in the diameter direction of the pipe and is installed horizontally. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis with a rotation angle of 0 掳 - 90 掳. When the butterfly plate rotates to 90 掳, the valve is fully open. Because of its simple structure, small size, and light weight, it is widely used in various industries
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