The Butterfly Valve is a commonly used fluid-control valve that derives its name from the shape of its closing piece (also known as the disc or butterfly plate), which resembles a disk or butterfly wing. The butterfly valve controls the flow or truncation of the pipe medium by rotating this disc-shaped disc.
The working principle of butterfly valve is to rotate the valve disc in the valve body by rotating the valve stem, and the rotation Angle of the valve disc determines the opening of the valve, thus controlling the flow of the medium. When the valve disc is rotated to a position parallel to the pipeline axis, the valve is in a fully open state, and the medium can pass smoothly; When the disc is rotated to a position perpendicular to the pipeline axis, the valve is fully closed and the medium is cut off.
Butterfly valve has the advantages of simple structure, small size, light weight, easy operation, rapid opening and closing, good flow regulation performance, etc., so it is widely used in various pipeline systems in petroleum, chemical industry, metallurgy, electric power, water supply and drainage, municipal construction and other industries, for regulating and cutting media.
It should be noted that the sealing performance of the butterfly valve is relatively poor, especially in the case of high pressure, high temperature or corrosive and abrasive media, its sealing performance may be affected. Therefore, when selecting the butterfly valve, it is necessary to select the appropriate valve type and material according to the specific working conditions and medium characteristics to ensure its normal operation and long-term stability.
