Annex AA indicated in the previous paragraph, divides vacuum cleaners for hazardous dust into three Classes of use:
The filtering characteristics are guaranteed by both tests performed on the machine as whole and tests performed on each of the filters installed. A filter efficiency certificate is issued for each machine in Class H.
Nilfisk tests its industrial vacuum cleaners to make sure they meet the above requirements in international laboratories (IMQ, TUV, SLG). In addition to the initial tests done on the product, these bodies also perform periodic tests at Nilfisk to guarantee continuity of performance over time.
Nilfisk supplies specific systems to extend the range of materials that can be cleaned using its vacuum cleaners also for extreme situations such as in the presence of liquids, high temperatures, fibrous materials, etc., hazardous dust and materials representing a health risk, or ATEX-classified materials. Ancillary equipment guarantees safety for the operator during collection and disposal.
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The management of hazardous dust and materials is not limited solely to collection and must also consider disposal management. For this reason, always within the scope of the above EN normative, all Nilfisk vacuum cleaners can be equipped with specific disposable containers or bags to easily dispose of the collected material, such as safe bags or Bag-in Bag-Out systems. Moreover, Class H vacuum cleaners are always supplied with such systems, as required by standard EN60335-2-69.