The FP 211 ATEX and FP 213 ATEX systems are equipped with cleanable anti-static filter cartridges which allow dust build-up to be removed from the filters using bursts of compressed air. This means that these devices are ideal for applications in which large amounts of dry, flammable dust with a minimum ignition energy of > 3 mJ are extracted, and that they have a very long service life in comparison to systems with saturation filters.
The systems meet the requirements of the ATEX directive (EX II 2/- Dc IIIC T100oC) and are suitable for extraction from a zone 21, although the systems must be placed outside of the zone. The suitability for the respective application depends on the substance to be extracted and must be considered individually. In appropriate situations, use for a minimum ignition energy of < 3 mJ can also be checked.
The contaminated air, which consists of flammable dusts, is collected by the collection unit (extractor hood, suction arm, hose, etc.) and transported into the filter unit directly or through an earthed pipe or flexible hose. The dust particles are filtered out by a cleanable anti-static filter cartridge in the filter unit. The filter cartridge is cleaned using an automatic cleaning system. The filtered-out dust particles are collected in a dust collector for easy disposal. If necessary, a dust bag can also be inserted for low-contamination disposal. The cleaned air is then passed through a particle filter (which represents another level of safety) and – depending on the application – transported back into the work area or diverted outdoors.