About

About KOSEN VALVE
FOCUS ON VALVE R&D AND MANUFACTURING

Kosen Valve Co., Ltd. is a professional valve manufacturer that integrates scientific research, development, testing, manufacturing, sales, and after-sales service. Headquartered in Oubei, Zhejiang, a renowned valve manufacturing hub in China, our company spans 6,000 m² and is equipped with world-class valve machining and manufacturing equipment.

We offer a full range of valve products, including Ball Valves, Gate Valves, Globe Valves, Check Valves, Plug Valves, Butterfly Valves, and Pipe Strainers. Main materials include carbon steel, stainless steel, Cr-Mo steel, cryogenic steel, Hastelloy C, Monel, duplex stainless steel, and high-nickel alloys such as INL625 and INL825.

Size Range: 1/2 Inch – 40 Inch

Pressure Rating: Class 150 LB – 2500 LB

Temperature Range: -196°C to 570°C

Standards: Chinese, American, Russian, German, British, Japanese, and others

KOSEN valves are widely used in industries such as petroleum, chemicals, power, natural gas, coal chemicals, aerospace, metallurgy, and pulp & paper.

We maintain a comprehensive manufacturing setup with advanced equipment, including CNC lathes, boring machines, CNC grinding machines, drilling machines, milling machines, and planning machines. These support our capabilities in assembly, testing, and inspection.

Our team consists of highly experienced engineers and skilled technicians who are certified and professionally trained in the valve industry. Every department is led by experts with deep industry experience, ensuring top-level performance and reliability.

KOSEN is committed to quality and holds certifications including ISO 9001, CE, and more. Our products are trusted worldwide in applications such as refineries, chemical and petrochemical plants, oil and gas (upstream, midstream, downstream), offshore platforms, water treatment, and power generation.

We continuously develop innovative technologies to enhance customer satisfaction. We deeply appreciate the trust and long-term support of our existing clients and warmly welcome new customers to partner with us.

For any valves, pipes, or fittings, please feel free to explore our website or contact us directly.