Valve, Butterfly Valve, Wafer Butterfly Valve manufacturer / supplier in China, offering Fluoroplastic F4 Lined Wafer Butterfly Valve – Acid/Alkali Resistant (PN16/25), Full PTFE Sealed Butterfly Valve for Aggressive Media – Pn16/25, DN40-300, High-Performance F4 Lined Industrial Butterfly Valve (PN16/PN25, DN40-300) and so on.