The lift check valve is an automatic sealing valve that relies on medium force to open and close the valve disc, preventing medium backflow. The valve disc is equipped with a spring device, and the valve can be installed horizontally and vertically. It has the characteristics of reasonable structure, reliable sealing, excellent performance, beautiful appearance, and long service life. Suitable for steam, hot and cold water, oil products, biphenyl, fatty acid liquid ammonia, ammonia, natural gas and other media.