Micron rating (absolute) Applications P series Polypropylene micro fiber 0.2, 0.45, 1, 5, 10, 20, 50 micron DI water, cooling water (PCW), pre-filtration E series PES (polyethersulfone) membrane 0.04, 0.1, 0.2, 0.45, 0.65, 1.2 micron Clean and rinse process, fianl