"Purifying filter for dusts and fumes with automatic cleaning in backwash mode. Operating principle: the CORAL cartridge filter with backwash cleaning mod. AIRCOMPACT is made up from, cartridge filtering elements enclosed in an air-tight central body and is designed to be used in vacuum plants. The dusty air enters from the connection in the lower part of the hopper and, due to the effect of a sudden decrease in speed, the larger particles settle and end up in the relative collection bin. The smallest or lightest particles re-ascend the body, inside which the filtering cartridges are housed; the polluted air runs through the cartridges from the outside inwards, in a way that the dust deposits externally while the air moves along the cartridge and escapes purified."