KNF LABOPORT Manual Del Usuario página 65

Use
Designation
II
2/-G
IIB + H2
T3
Gb
Internal atmos-
phere only
Device group I Device group I applies for devices that are used in under-
Device group II Device group II applies for devices that are used in other ar-
10
Chemically-resistant Laboratory pump N820.18
Description
Symbol for explosion-proof pumps
Device group (see3.4.1 Device groups)
Device category (see 3.4.2 Device categories for gas)
Explosion groups (see 3.4.3 Explosion groups)
Temperature class (see 3.4.4 Temperature classes)
Equipment protection level (See Chapter 3.4.6 Equipment
protection level for gas)
Special operating conditions (See Chapter Special operating
conditions)
Special conditions (see 3.4.7 Special operating conditions)
Tab.3: Explosion protection designation
An ignition hazard assessment in accordance with standards
DIN EN ISO 80079-36 and DIN EN ISO 80079-37 was per-
formed for the pumps.
The explosion protection designation can also be found at the
following location:
§
Type plate of the pump
3.4 Explanations of the explosion protection
designation
3.4.1 Device groups
ground plants of mines as well as their underground systems
that could be endangered by methane and/or combustible
dusts.
eas that could be endangered by an explosive atmosphere.
Translation of Original Operating Instruction, English, KNF
317428-317425 09/20
EX