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Butterfly valve structureButterfly valves usually use three-eccentric multi-layer metal hard seal structure, which is widely used in metallurgy, electric power, petrochemical, and industrial pipelines such as water supply and drainage and municipal construction. Users can choose higher or different media if temperature and acidity are required. Different materials, such as 304 stainless steel, 316, duplex stainless steel, chrome molybdenum steel, chrome molybdenum vanadium steel and other materials. Hard-seal butterfly valves are used to regulate flow and load-carrying fluids. The valve adopts a triple eccentric structure, and the sealing surfaces of the valve seat and the disc plate are made of different hardness and stainless steel, and have good corrosion resistance and long service life.
A butterfly valve is a type of valve in which the closing member (valve or disc) is a disc that rotates around the valve shaft to open and close, and is mainly used for cutting and throttling on the pipeline. The butterfly valve opening and closing member is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjusting. The butterfly valve is normally less than 90° from full opening to full closing. The butterfly valve and the butterfly rod have no self-locking capability. For the positioning of the butterfly plate, a worm gear reducer is added to the valve stem. The use of a worm gear reducer not only enables the disc to have a self-locking capability, but also stops the disc at any position and improves the operational performance of the butterfly valve.
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