Butterfly Valve, Check Valve manufacturer / supplier in China, offering Wafer Pattern PTFE Full Coating Butterfly Valve for Sea Water / Acid/ Base/ Corrosive/ Alkali/ Food/ Drinking Water/ Portable Water, Aluminium Bronze B148 C95400 C95200 C95500 C95800 Dual Plate Check Valve, Wafer Connection Double Door Butterfly Check Valves and so on.