Pleated filter cartridge is one kind of filter elements with absolute-rated, highest-performance and longer service life. Generally this type of elements is manufactured into outside to inside flow, and it can also be manufactured into inside to outside flow according to customer’s requirements, which allows contamination to be captured inside the cartridge. Pleated cartridge provides superior flow, increased dirt holding capacity and lower pressure drop. This sort of filter elements is excellent solution to many high purity water industrial applications such as chemical process industry, pure water, power industry, petrochemicals and potable water supply system etc.