Patent ID: 6910589

Claim:
A pleated filter cartridge for removing particulates from liquid, the pleated filter cartridge being of the type including a perforate core, a pair of endcaps, and an annular filter element around the core formed by substantially axially-parallel pleats of of non-woven filter material, the filter element having opposite ends each in sealing engagement with one of the endcaps, characterized in that the filter element consists of a single layer of the filter material and a mesh layer, the single-layer filter material being a non-perforated non-woven material of flash-spun plexifilamentary high-density polyethylene fibrils, the filter material having a thickness of less than about 0.15 mm, a pressure drop of less than 4 psid at a flow rate of 10 gal/hr, and a filtration efficiency of at least 98% of 1–2 micron particulates at a pressure differential of 30 psid.