China Kos Valve Co.,Ltd, Leading manufacturer DIN Bellows Sealed Globe Valve,DIN Gate Valves,DIN Globe Valves, DIN Check Valves,DIN Strainers and DIN Ball valve, and so on. "KOS*?is a leading supplier of valves for Steam system ,Hot Oil, Gas, Marine system,and Power Generation industries. We have won the certificate of **E*?**NV ISO 9001*?TUV, and export to many countries.