High performance pure polypropylene depth dual-gradient density filter media is under highly controlled manufacturing process which guarantees consistently reproducible filter performance. PM-series filters are comprised of an inner compact rated section for exceptional dirt-holding capability and the outstanding performance which meets the highest quality requirements are selected for critical filtration application.

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PP Melt Blown cartridge is able to retain contaminants throughout the entire cross section of the filter. The density increases progressively from the exterior surface to the interior and "graded density" allows larger particles to be trapped near the surface while smaller particles penetrate the larger open areas to be trapped nearer the center of the filter in the smaller openings.