Butterfly Valve, Flange Adaptor, Dismantling Joint manufacturer / supplier in China, offering Resilient Seated (Vulcanized Sleeve) -U Type Butterfly Valve, Double Flange Butterfly Valve with Gearbox Pn6/Pn10/Pn16, High Quality Product Double Flange Butterfly Valve with Gearbox Pn6/Pn10/Pn16 and so on.