The pneumatic wafer-type hard seal butterfly valve utilizes a precise J-shaped elastic sealing ring and a three-eccentric multi-layer metal hard seal structure. It is widely used in industrial pipelines with medium temperatures up to 425°C in metallurgy, power, petrochemical, water supply and drainage, and municipal construction, for regulating flow and cutting off fluids. This valve adopts a three-eccentric structure, with the valve seat and disc sealing surface made of stainless steel with different hardnesses, providing excellent corrosion resistance and a long service life
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