shanghai shuanggao valve group co.ltd, which is one of the leading manufacturers and exporters of valves in China. we are located at Songjiang District of shanghai, which is a economic Zone. we had been handing this business for twenty years and established long good term business relationship with many domestic and world customers and clients. we had won good reputation by offering good qualified products and professional services. we are in good position to supply following products:　　High temperature high pressure power station valves,petrochemical and oilfield valves,gas valves,water power large butterfly valves,gate valves,globe valves,check valves,butterfly valves,ball valves,water valves,water seal valves, plug valves, anticorrosive valves, electric actuators, other special valve...