ZSHWB series double eccentric butterfly valve (referred to as high performance butterfly valve) valve plate and seal ring adopt unique eccentric structure, with features of compact structure, small volume, light weight, good cutting performance, long service life, easy maintenance and repair. Widely used in chemical, electricity, textile, food, medicine and other industrial sectors and municipal engineering, water plants and other pipelines to cut water or sewage or air, gas, natural gas medium cut-off or adjust the flow control.