KNF LABOPORT Manual De Instrucciones página 82

Explosion protection
Chemically-resistant Laboratory pump N820.18 / N840.18
4.3 Explanations of the explosion protection
designation
4.3.1 Device groups
Device group I Device group I applies for devices that are used in under-
ground plants of mines as well as their underground systems
that could be endangered by methane and/or combustible
dusts.
Device group II Device group II applies for devices that are used in other ar-
eas that could be endangered by an explosive atmosphere.
Translation of Original Operating Instruction, KNF 317428-317425 02/23
18