VERDER VERDERFLEX Dura D10, Instruction Manual

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ATEX Instruction Manual
Dura 05-55
Version 1.0v-07/2019 8 | Page
4 ATEX Specification
1. The ATEX code consists of the group, category, ignition
protection marking and temperature class.
2. ATEX rating of Verderflex Dura pumps is to the following
standard which is explained below:
EX h IIB T4 Gb / Db for T ambient -5°C to 40°C
*
The ambient temperature range depends on the pump type.
(
g
refer to 3.1 ATEX Name Plate)
4.1 Gas Group
Gases are classified according to type of hazardous
environment and ignitability of the gas/air mixture as
defined in EN/IEC 60079-21-1.
Table 4 ATEX Classification
Item Example Explanation
Ignition Pro-
tection
h
Non-Electrical Equipment
meeting the requirements of
EN ISO 80079-36:2016 is
marked with “h”.
Gas Group IIB Gas Group II - Ethylene
Temperature
Class
T4
Maximum surface tempera -
ture < 135 °C
ATEX
Category
Gb/Db
Equipment Protection level:
Gb: Gas zone 1
Db: Dust zone 21
Ambient
Temperature
Range *
for T ambient
-5°C to 40°C
Maximum ambient tempera -
ture for operating the pump
-5°C to 40°C
4.2 ATEX Category
Zones are decided by the site based on a risk assessment
of the likelihood of a potentially explosive atmosphere be -
ing present.
4.3 Temperature Class
The Temperature Class rating of T1, T2, T3, T4, T5 or T6
for gases, indicates the classification for the maximum sur -
face temperature for the device and therefore the the dis-
tance to the potential ignition temperature for a particular
gas.
Gas Group
I Mines
II
Surface above ground with
gas hazard
III
Surface above ground with
dust hazard
Gas Sub
Group
A
Less easily ignited gases
e.g. propane
B
Easily ignited gases e.g
ethylene
C
Most easily ignited e.g.
hydrogen or acetylene
Table 5 Gas Group Classification
Gas Zone ATEX Category
Zone 0 Ga
Explosive atmosphere pre -
sent continuously or for long
periods, frequently
Zone 1 Gb
Explosive atmosphere is
likely to occur under normal
conditions, occasionally
Zone 2 Gc
Explosive atmosphere is
unlikely to occur under nor -
mal conditions, short periods
Table 6 ATEX Category - Gas Zone
Dust Zone ATEX Category
Zone 20 Da
Explosive atmosphere pre -
sent continuously or for long
periods, frequently
Zone 21 Db
Explosive atmosphere is
likely to occur under normal
conditions, occasionally
Zone 22 Dc
Explosive atmosphere is un -
likely to occur under normal
conditions, short periods
Table 7 ATEX Category - Dust Zone
T Class Maximum Surface Temperature
T1 450°C
T2 300°C
T3 200°C
T4 135°C
T5 100°C
T6 85°C
Table 8 Temperature Classification