Bag filters are available in three FDA compliant media formats, of which polypropylene felt is suitable for the majority of applications. Polyester felt should be selected where solvent compatibility and high temperature are required. For coarser filtration, mesh, which is washable and reusable, is offered from 50 to 1000 micron. Available to special order are double-layer polyester and polypropylene extended life, nylon multi-filament, Teflon and oil-removal media.
Although cartridge filtration can give more accurate results, when bag filtration is correctly specified, superior, effective and economic performance will be achieved, where comparable cartridge filtration housings would require far greater capital and consumable expense.