The electric explosion-proof butterfly valve is composed of a rubber sealed butterfly valve, a carbon steel or stainless steel valve plate, and a valve stem. It uses a precise U-shaped elastic seal ring metal hard seal structure, and is widely used in metallurgical, electric power, petrochemical, water supply and drainage, municipal construction and other industrial pipelines with medium temperature of 425 ℃ or higher, for flow adjustment and fluid cut-off.

(2) As the thread of the valve stem often rubs against the valve stem nut, it is necessary to apply some yellow glycerin or graphite powder for lubrication.