Information On The Ex-Designation - KNF LABOPORT SH820G Originalbetriebsanleitung

Vacuum system SH820G / SR820G / SH840G / SR840G
Translation of Originial Operating Instruction, KNF 325562-325564 02/23

4.2 Information on the Ex-designation

This KNF vacuum system is marked with the following device
designation according to the latest explosion protection direc-
tive. The designation is only valid for the transfer section (me-
dia-contacting region) of the vacuum system:
Fig.2: EX-designation of the vacuum system
Category "3/-G" vacuum systems are designed for the trans-
fer of gases, vapors or mists with which it is unlikely that an
explosive atmosphere will form. However, if this does happen,
in all probability it will happen only rarely and for a short pe-
riod of time.
The devices are to be arranged so that they cannot be me-
chanically damaged from the outside.
It is forbidden to make any changes to the vacuum systems.
After a wearing part is replaced, the original function of the
vacuum system must be tested by verifying that the specified
ultimate vacuum is reached (see Operating instructions,
Chapter 10 Servicing [} 51]).
Explosion protection
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