DXF series diaphragm type check valve with self suction filter structure design,magnet,diaphragm,so that the valve can beautomatically closed relationship between valve installation size and angle limit reverse pressure,with small flow resistance,large flow,internal leakage is almost zero,and other characteristics,the energy efficiency is better than that.The service lifeof more than 10 million times.The valve is suitable for all refrigerants and large and medium sized cold and hot airconditioning systems.In order to ensure the normal closure of the product,the built-in filter screen is 30 mesh.