Importance

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Abstract

A filter cartridge (20) and method for making a filter cartridge (20) for removing particulates from a particulate laden fluid stream moving one direction through the filter cartridge. The filter cartridge (20) is periodically subject to cleaning fluid moving in an opposite direction to the fluid stream. The filter cartridge (20) comprises filtration media (24) formed into a tubular configuration and having a plurality of circumferentially spaced apart pleats (26). A retention device (82) to limit radial movement of the filtration media (24) when subjected to the periodical cleaning fluid and to maintain the pleats (26) in the filtration media circumferentially spaced apart when exposed up to 130 degrees Celsius. Preferably, the extrudate (144) is thermoplastic, polyester, elastomeric material and at least one additive may be present. Multiple layers of the extrudate (144) may be fused together.

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First Claim