... times more) 2. Filter Flow of Filter Cartridge: 3M comp. 7 DHCH Series Cartridge Filter Takes more impurities, Oil Filter 1. Application: Developed ... Water, Wasted Water, Underground Water.d. Carbon bed, Oil filter water.e. Edible Oil, Resin, Metal Cutting Liquid, Organic Solvents, Photo ... for a long period, no need to change the filter element frequently, no need to shut off the machine regularly, ...