ProMinent Sigma 3 Basic Operating Instructions Manual page 24

Safety chapter
Explanation of the pump's ATEX labelling Sigma S3Ba
Unit group
II No mines or associated underground systems, which can be endangered by firedamp - Unit for use in
other areas at risk from explosion
Other parameters
3G Ex h
24
(Example)
Explosion group
IIC for Group IIC gas
- Refer to the material safety data sheet for the gas or, for example,
Ä Tab. 2 'Example of the division of gases into explosion groups and temperature
classes' on page 25
IIB for Group IIB gas
- Refer to the material safety data sheet for the gas or, for example,
Ä Tab. 2 'Example of the division of gases into explosion groups and temperature
classes' on page 25
Temperature class
T3 for Temperature class T3 gas
- Refer to the material safety data sheet for the gas or, for example,
Ä Tab. 2 'Example of the division of gases into explosion groups and
temperature classes' on page 25
T4 for Temperature class T4 gas
- Refer to the material safety data sheet for the gas or, for example,
Ä Tab. 2 'Example of the division of gases into explosion groups and
temperature classes' on page 25
Equipment protection level (EPL)
Gb high EPL in normal operation and in the event of expected errors;
use possible in zones 1 and 2
- refer to your explosion protection document
Gc normal EPL in normal operation;
use possible in zone 2
- refer to your explosion protection document
Suffix X
X Special conditions - refer to the Declarations of Conformity
and EC-type examination certificates