In general, UFO-A filtering units are designed for cleaning the dust-laden air from contamination, formed during production processes. It is irreplaceable in capturing the dry dust particles emitted during the welding, grinding of non-sparking materials, gas- or plasma cutting of metals or other dust emitting processes, in chemical industry, pharmaceutics, food production, plastic processing and others. Maximum temperature of the forwarded air should not exceed +60°C. The appliance is equipped with cartridge filters, collecting the dust particles on the outer filter surface. The deposited dust must be cyclically struck down by impulses of compressed air.