UHB series large-flow folding filter core adopts a large diameter structure of 6.5 inches, with extremely high filtering area and pollution capacity, which can be used for a variety of flow requirements. The internal structure has high strength polypropylene support to prevent deformation of the filter material, and the external support is divided into two kinds of structures, namely integrated polypropylene framework and polyester filter net. With good high temperature resistance and wide chemical compatibility, the filter and filter system has the advantages of high flow, small size and low investment. The inner filter core is made of polypropylene, and the end cover and filter layer are welded by hot melt. There is no adhesive present. The filter core will not cause secondary pollution to the filter separation medium during the whole process of use.