Special and Cordless Industrial Vacuums

An ATEX vacuum is needed where explosive dust or gases can form in the air, as in some processes involving wood, plastic or metal powders. The model must be chosen according to the classification of the area, which the employer defines in the risk assessment document. A standard vacuum in these areas can trigger an explosion.

A vacuum for hazardous dust has an M or H class filter, which retains very fine particles, and often an automatic filter cleaning system. A standard one lets some fine dust pass through, which returns to the environment. For harmful or sensitising materials, a machine with suitable filtration and a sealed container is recommended.

Where there is no mains supply, a battery vacuum can be used, such as the DeWalt XR Lithium 18V Class L solids and liquids vacuum, in bare-tool version, or the Stanley FMC795B 18V solids and liquids vacuum. Check that the battery is compatible with other tools in the same line, as each brand uses different packs. Check the data sheet to see whether the battery and charger are included.

An extraction system such as the Nilfisk FES223BI Z22 extraction system is designed for continuous use, connected to the machine that produces dust, such as a sander or a workbench. It captures dust at source and allows the filter to be emptied without stopping work. For hazardous dust, the filter must be replaced according to the manufacturer's instructions.

Look at the air flow rate and the vacuum (negative pressure) figures given in the data sheet, rather than the wattage alone. For chases, holes and small clean-ups, a site vacuum such as the SPIT Ac 1630 Ph site vacuum is enough. For demolition and continuous work over several hours, consider models with a larger tank and automatic filter cleaning, so the machine does not have to stop to be emptied.

D.Lgs. 81/2008 (the Italian workplace safety law) requires the employer to assess the risk from dust and to choose suitable equipment, with protection for workers. For silica dust, present in concrete and plaster, the decree provides specific prevention measures. In places with a risk of explosion, Title XI of the same decree applies. Ask the safety officer which protection to use.

Check the battery condition before starting and do not recharge it in areas with accumulated dust. In ATEX models, do not open the container or change the filter in a classified area without the prescribed procedures. Empty the filter wearing gloves and a mask, and follow the manufacturer's instructions for periodic maintenance.