KNF LABOPORT SH820G Manual De Instrucciones página 102

Explosion protection
Vacuum system SH820G / SR820G / SH840G / SR840G
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 Originial Operating Instruction, KNF 325562-325564 02/23
18