Electric Butterfly Valve, Electric Ball Valve, Electric Control Valve manufacturer / supplier in China, offering DN80 Pn16 Wcb Body SS316 Disc Pneumatic Butterfly Valve Corrosion-Proof, ISO 5211 Flange for Acid/Alkali Piping, DN300 Electric Butterfly Valve Motorized Actuator with Position Feedback for Wastewater Aeration Tanks, Failed Close UPVC Pneumatic on/off Valve PTFE Seals Corrosion-Proof for Chemical Acid, Alkali, Corrosive Liquid Wastewater Scrubbers Industrial Valve and so on.