Hebei Xinghai Valve Co.,Ltd. with DNV: ISO 9001 certification established in 1997 covers 40000 square meters with about 180 employees and more than 150 sets of casting/machining equipments. We are a professional manufacturer of cast iron wafer/flanged butterfly valves, wafer check valves, cast iron gate valves, cast iron ball valves, Y-strainers , etc. The materials of these valves are grey iron or ductile iron.