The various filter stages
A continuously self-cleaning prefilter separates fibres and coarse particles using a filter media. The vacuumed off coarse particles are taken to a separator with a conveying fan.
A continuously self-cleaning fine filter separates any dust still remaining in the airstream almost completely. The airflow through the filter drums is from the inside to the outside. The dust collects on the filter media, is continuously vacuumed off by rotating nozzles and passed to a cyclone separator.
All drive elements are located on the clean air side.
The filter surface is adapted to the requirements by changing the number of filter drums.