M"-type Butterfly Valve structure is simple, it is a single eccentric soft seal Butterfly Valve, equipped with two-stage stem from top to bottom, disc surface is coated with sealing glue layer, on the disc two ends sealing surface is designed to "M "shape, so that formed double sealing between the disc and body, between the "M" shaped layer will seal air, which will make the sealing to be more effective. The valve is mainly composed by the valve body, upper and lower stem, all-inclusive plastic disc, internal thread cylinder pin and other components.
　　When open the valve, using wrench counter-clockwise slowly rotating the upper part square tenon of the main stem, so that disc is perpendicular to flange surface, when the valve is closed, using wrench clockwise slowly rotating the upper part square tenon of the main stem, so that disc is parallel to flange surface.

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