Butterfly Valve, Flange Adaptor, Dismantling Joint manufacturer / supplier in China, offering DN40-DN300 En558; API609; DIN3202 Pn16 Resilient Seated (Vulcanized Sleeve) -Wafer Type Butterfly Valve, High Quality Wafer Butterfly Valve with Vulcanized Liner According to En 593, China Factory-Made Ductile Iron/Stainless Steel/ Nylon Pn 6/10/16/21/25 Low Pressure Air-Conditioner Wafer Butterfly Valve and so on.