Wafer Butterfly Valve, Flange Butterfly Valve, Lt Butterfly Valve manufacturer / supplier in China, offering Alloy Worm Gear Operate 8inch DN200 PTFE Seat PTFE Disc Pn16 150lb Wafer Butterfly Valve, Pn16 Low Pressure Handle Actuator Hydrochloric Acid Ggg50 Ductile Iron PTFE F4 Butterfly Valve, CE Certificate 4inch DN100 Aluminum Handle Lever PTFE Disc PTFE Seal Wafer Butterfly Valve and so on.