KNF LABOPORT SH820G Originalbetriebsanleitung Seite 106

Explosion protection
Equipment
protection
level
Ga
Gb
Gc
22
4.3.6 Equipment protection level for gas
The equipment protection level describes the frequency and
the duration of the occurrence of explosive atmospheres in an
area.
Description*
Devices with very high protection level for
use in potentially explosive atmospheres.
With these devices, there is no risk of igni-
tion during normal operation or in the event
of foreseeable or infrequent faults/malfunc-
tions.
Devices with high protection level for use in
potentially explosive atmospheres in which
there is no risk of ignition during normal op-
eration or in the event of foreseeable or in-
frequent faults/malfunctions.
Device with increased protection level for
use in potentially explosive atmospheres.
There is no risk of ignition during normal op-
eration. The devices have a number of addi-
tional protection measures which ensure
that, in the event of commonly foreseeable
faults in the device, no danger of ignition ex-
ists.
Tab.10: *According to ISO 80079-36
Translation of Originial Operating Instruction, KNF 325562-325564 02/23
Vacuum system SH820G / SR820G / SH840G / SR840G
Constructional
safety
Very high
High
Increased