What types of sanitary butterfly valves can be divided into types according to the connection mode
According to the connection mode, the sanitary butterfly valve can be divided into several categories. The sanitary wafer butterfly valve is simple in structure, small in size and light in weight, and consists of only a few parts. Classification according to the connection method 1. Sanitary wafer butterfly valve The butterfly plate of the wafer butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0°-90°. When the rotation reaches 90°, the valve is fully opened. The wafer butterfly valve is simple in structure, small in size, light in weight, and consists of only a few parts. Moreover, it can be opened and closed quickly by rotating 90°, and the operation is simple. At the same time, the valve has good fluid control characteristics. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is small, so it has better flow control characteristics. The butterfly valve has two sealing types: elastic seal and metal seal. Elastic sealing valve, the sealing ring can be inlaid on the valve body or attached to the periphery of the butterfly plate. 2. Sanitary Flanged Butterfly Valve The flanged butterfly valve has a vertical plate structure, and the stem is an integral metal hard seal. The sealing ring of the valve is a composite structure of flexible graphite plate and stainless steel plate. It is installed on the valve body and the sealing surface of the butterfly plate. Surfacing stainless steel. The sealing ring of the soft sealing valve is made of nitrile rubber and is installed on the butterfly plate. (3) Sanitary lug type butterfly valve. (4) Sanitary welded butterfly valve. Welded butterfly valve is a non-closed butterfly valve, which is widely used in the production process of building materials, metallurgy, mining, electric power and other production processes on pipelines with a medium temperature of ≤300℃ and a nominal pressure of 0.1Mpa to communicate, open and close or adjust the amount of medium. (5) Sanitary fast-install butterfly valve. The quick-install butterfly valve is a non-closed butterfly valve with chucks at the main ends, which is convenient for installation and maintenance and disassembly. It is widely used in the production process of building materials, metallurgy, mining, electric power and other production processes. The medium temperature is ≤300℃. The upper part is used to connect, open and close or adjust the amount of medium.