Butterfly Valve, Flange Adaptor, Dismantling Joint manufacturer / supplier in China, offering Qt Explosion-Proof Rotary 24V, 220V, 380V Electric Actuator for Ball Butterfly Valve, Qt Actuators for Butterfly Valves Torque From DN32-DN600, Cast Iron Y Type Strainer with Stainless Steel Fine Mesh Flange Connection and so on.