The ZSH(DR)WE series triple-eccentric butterfly valve uses a special triple-offset geometry between disc and sealing ring. It is compact, provides good shutoff and long service life, and minimizes friction between disc and seat during opening and closing, eliminating the jumping behavior seen in conventional valves. The valve enters its controllable range from 0° and continues to 90° fully open; its normal rangeability is more than twice that of ordinary butterfly valves and can reach 100:1, supporting precise control as well as shutoff. It is widely applied in chemical, power, textile, food, pharmaceutical and paper industries and in municipal works and water plants for isolating or regulating water, sewage, oil, air, coal gas, natural gas and steam.