Legal framework conditions for different dust classes apply. They are described in the international standard IEC 60 335-2-69, which divides dust into three different dust classes: L, M and H.
Dust class L:
Ordinary and non-hazardous dust, e.g. household dust, and ordinary and non-hazardous materials, e.g. soil.
Dust class M:
All wood dust as well as dust from sealants, fillers and varnishes, gypsum, cement, concrete, tile adhesives and paints such as latex and oil paints, or materials containing quartz such as sand and pebbles.
Dust class H:
Cancer-causing dust, dust with cancer-causing and disease-causing particles, as well as dust with mould spores, asbestos, mineral fibres, asphalt and artificial mineral fibres such as glass wool.
So what exactly does that mean?
For all harmful dusts, there are fixed occupational limit values (AGW) in mg/m3 of air within the dust classes. This standard divides dust into three classes, L, M and H. The occupational limit value (AGW) sets the maximum concentration of dust in the air at which no health problems can be expected even when working for prolonged periods (eight hours a day, five days a week). The lower the AGW value in mg/m3 in the air, the more dangerous the dust and the higher the health risk.
Design approval | Filtration stage of the filtration system | Suitability |
Dust class L1) | > 99 % | Noxious dust with limit values3) > 1 mg/m3 |
Dust class M1) | > 99,9 % | Noxious dust with limit values3) > 0,1 mg/m3 |
Dust class H1) | > 99,995 % | Noxious dust with limit values3) <= 0,1 mg/m3 |
Vacuum cleaner type B222) | depending on dust class | combustible dust of explosion hazard class ST1, ST2 and ST3 in zone 22 |
Now just choose the size of the container, the necessary accessories for the vacuum cleaner and you can start vacuuming.