Kosen Valve Manufacturer Co., Ltd (https://www.kosenvalve.com/) is a professional valve manufacturer specializing in the research, development, production, and service of high-performance industrial valves. Located in Oubei, Zhejiang—China’s renowned valve manufacturing center—our facility covers 6,000 square meters and features state-of-the-art machining and testing equipment sourced internationally. Our product range includes ball valves, gate valves, globe valves, check valves, plug valves, butterfly valves, and pipe strainers, available in materials such as carbon steel, stainless steel, alloy steel, Hastelloy C, Monel, duplex steel, cryogenic steel, and other high-performance alloys.

With valve sizes from 1/2 inch to 40 inches, pressure ratings from Class 150 LB to 2500 LB, and temperature capabilities from -196°C to 570°C, our products are engineered to meet the demands of a wide variety of applications. We strictly comply with international and national standards including those from China, the United States, Russia, Germany, the United Kingdom, and Japan. This ensures our valves perform reliably and safely across different systems and geographies.

Serving a broad spectrum of industries—including oil and gas, chemicals, electric power, metallurgy, aerospace, coal chemicals, and pulp and paper—KOSEN has built a reputation for quality, innovation, and technical excellence. Our integrated approach, from design to after-sales service, allows us to deliver tailored valve solutions that consistently meet the expectations of clients operating in critical and high-demand environments.