Butterfly Valve, Flange Adaptor, Dismantling Joint manufacturer / supplier in China, offering Pn6/10/16/25 Resilient Seated (Vulcanized Sleeve) -Wafer Type Butterfly Valve, China Manufacturer Give Birth to a Child-Wafer Butterfly Valve, DN40-DN300 En558; API609; DIN3202 Pn16 Resilient Seated (Vulcanized Sleeve) -Wafer Type Butterfly Valve and so on.