Nilfisk-Advance America GB 1133 - Manual (Page 5)

4 Categories of application
This Nilfisk machine is suitable for removing dusts of the following categories of
application:
“U“ suitable for removing hazardous, dry, not inflammable dusts whose MAK*
limiting value is greater than 1 mg/cm³ (comparable to the new dust class “L“
- light hazard - defined by EN 60335-2-69).
“S“ suitable for removing hazardous, dry, not inflammable dusts whose MAK
limiting value is greater than 0.1 mg/cm³ (comparable to the new dust class
“M“ - medium hazard - defined by EN 60335-2-69).
“C“ suitable for removing hazardous, dry, not inflammable dusts with all MAK
limiting values (comparable to the new dust class “M“) as well as dry, not
inflammable dusts of carcinogenic substances (comparable to the new dust
class “H“ – high hazard – defined by EN 60335-2-69). The cleaned air is fed
back to the workplace atmosphere.
“K1“ suitable for removing hazardous, dry, not inflammable dusts with all MAK
limiting values as well as dry, not inflammable dusts of carcinogenic
substances. The cleaned air is fed back to the workplace atmosphere
(comparable to the new dust class “H“).
*maximale Arbeitsplatz-Konzentration, maximal workplace concentration
Explanation
Since May 1998, Europe has a common norm. Dust removing systems are from now
on divided into three dust classes L, M and H. Older test certificates remain valid until
December 31
st , 2002. “Category of application“ is a synonym for “dust class“.