Spectrum Premier Pleat Depth Polypropylene Particle Retention Efficiency The PPDP range is a product development on the popular SPECTRUM Premier Pleat. Designed to combine the science of depth filtration within a pleat format, this increase in layered media and cartridge construction allows for a higher dirt holding capacity over standard pleated cartridges. The PPDP is ideal for applications targeting a wider range of particulate size and those of a softer, more gelatinous form.
