Air separation units are widely used in various industries, such as oil and gas, chemistry, paper making, metallurgy and so on. The main products of air separation unit are oxygen and nitrogen. With the rapid development of metallurgy, chemical industry and coal chemical industry, new requirements have been put forward for the technical development of supporting equipment while requiring the development of air separation equipment in a larger scale. With the continuous large-scale domestic air separation equipment, new technical requirements for matching valves are constantly put forward. Chaowei can provide a complete set of valve solutions for the air separation industry.