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Product overview Butterfly valve is a circular disc plate rotating with the valve stem as the opening and closing parts, to achieve the opening or closing of the valve, butterfly valve is mainly used as a cutting valve, can also be designed to have the adjustment and cutting function. Three eccentric multi-level butterfly valve has no mechanical wear, can reach zero leakage, suitable for petroleum, chemical industry, metallurgy, electric power, food, medicine, water supply and drainage, gas transmission and other different media of the pipeline as the best device to adjust and cut off the fluid.