Axial flow check valve is suitable for water, oil, steam and gas and other media, widely used in petroleum, chemical, electric power and water supply and drainage systems. Its design is compact, small flow resistance, suitable for high flow, low pressure drop conditions. Working temperature range is generally -29 ℃ to +425 ℃, depending on the material. The main function is to prevent backflow of media to ensure safe operation of the system. The valve body is often made of carbon steel, stainless steel or alloy steel, and the sealing surface is made of wear-resistant material, which has excellent corrosion resistance and sealing performance, adapts to various complex working conditions, is reliable in use and easy in maintenance.