SEV Axial flow check valve is a kind of high performance check valve designed in accordance with API6D and ASME B16.34. It is widely used in pipeline systems to prevent the harm of fluid backflow. It not only has the functional characteristics of general check valves, but also has the advantages of reducing the damage of water hammer, reducing noise, reducing pressure drop. Depending on the working temperature and pressure difference, SEV can provide corresponding solutions and professional technical services.