FLENDER ZAPEX - Conditions of Use; Table 2-2 Temperature Classes for Explosive Atmospheres as a Result of Gases, Vapours or Mists

Safety information
2.3 Safety information for a coupling when used in potentially explosive atmospheres
18 Edition 09/2022 M3560-02en
2.3.2 Conditions of use2.3 Safety information for a coupling when used in potentially explosive atmospheres
Note also the material-dependent permissible ambient temperature of the O-ring (12) ac-
cording to chapter O-rings (Page69).
A coupling designed in accordance with the Explosion Protection Directive is suitable for the
following conditions of use:
• Equipment group I
– Category M2
• Equipment group II
– Category 2 and 3
– Group of substances G, zone 1 and 2
– Group of substances D, zone 21 and 22
– Explosion group IIA, IIB and IIC
1. Gases, vapours or mists
Check the ambient temperature for use of the coupling in the relevant temperature class.
The maximum surface temperature of the coupling for a potentially explosive atmosphere as
a result of gas/vapour/mist mixtures is obtained from the maximum ambient temperature
and/or the maximum temperature of the adjacent components. The self-heating of the coup-
ling is minor. In normal atmospheric conditions for explosion protection applications, a max-
imum surface temperature<85°C can be expected.
Max. ambient temperature Temperature class Max. surface temperature
-45°C to +80°C T4 <135°C
-45°C to +60°C T5 <100°C
-45°C to +45°C T6 <85°C
Table2-2: Temperature classes for explosive atmospheres as a result of gases, vapours or mists
2. Dust/air mixtures
Check the ambient temperature.
The maximum surface temperature of the coupling for a potentially explosive atmosphere as
a result of dust/air mixtures is obtained from the maximum ambient temperature and/or the
maximum temperature of the adjacent components. The self-heating of the coupling is
minor. In normal atmospheric conditions for explosion protection applications, a maximum
surface temperature<85°C can be expected.
Notes concerning operation of the coupling in potentially explosive atmospheres
• Only use the coupling in potentially explosive atmospheres together with drive motors
that can be switched off in the event of the formation of an explosive atmosphere.
• Earth machines that are connected via the coupling with a leakage resistance of less
than 10
6
Ω.