Directory Dust Control & Explosion Prevention Big Round Filter (BRF) Imperial Systems Inc. Ease of operation Three-year warranty Minimizes the number of moving parts, reducing wear Self-contained cleaning system Reliable, easy-to-maintain rotating arm Request More Info Fill out the form below to request more information aboutBig Round Filter (BRF) More From Imperial Systems Inc. Big Round Filter (BRF) Diverter Valves BRF - Big Round Filter Cyclone Dust Collectors HD Airlocks LP Airlocks Cartridge Filter Overbags Flex Hose High Efficiency Cyclone DeltaMAXX™ Replacement Cartridge Filters High Speed Abort Gate CMAXX™ Dust and Fume Cartridge Collector