Ultra-Web FR (Flame Retardant) Cartridge Filter, for Donaldson Products including AerTable (Round Access Cover), CX, Downdraft Benches Models 2000 and 3000, Downflo II Dust Collectors and other brands of cartridge collectors. Filter media has a flame retardant treatment for airstreams containing sparks or embers and where fires might occur.
This is Ultra-Web filter media with a Flame Retardant (FR) treatment which should be selected when handling airstreams where sparks are present or fires might result. Cartridges are rated as MERV 13, suitable up to 180 degrees F airstreams, and have enhanced surface loading and excellent release characteristics . Flame retardant means it will not support an open flame.