DD973 electric clamp type multi-level metal hard seal butterfly valve adopts three-eccentric structure, valve seat and disc plate sealing surface are made of different hardness and stainless steel, with good corrosion resistance, long service life, the valve has two-way sealing function, the product meets the national GB/T13927-92 valve pressure test standard. The electric clamp-on metal hard seal butterfly valve adopts precision J-shaped elastic sealing ring and three-eccentric multi-level metal hard seal structure, which is widely used in industrial pipelines such as metallurgy, electric power, petrochemical, water supply and drainage and municipal construction with medium temperature ≤ 425 °C, for adjusting flow and carrying fluids. The valve adopts three eccentric structure, the valve seat and the disc plate sealing surface are made of different hardness and stainless steel, with good corrosion resistance, long service life, electric hard seal butterfly valve has two-way sealing function, the product meets the national GB/T13927-92 valve pressure test standard.