Kosen Valve Co., Ltd. is a leading valve manufacturer based in Oubei, Zhejiang, China. Its products include Ball, Gate, Globe, Check, Plug, Butterfly Valves, and Pipe Strainers. Materials range from carbon steel and stainless steel to duplex steel, Hastelloy C, Monel, and high-nickel alloys. Sizes span 1/2 Inch to 40 Inch, with pressure ratings from Class 150 to 2500 LB and temperatures from -196°C to 570°C. Built to international standards, KOSEN valves serve industries such as oil, gas, power, chemical, and aerospace.