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Safety instructions
2.3 Safety instructions for a coupling for use in potentially explosive atmospheres
18 Edition 09/2022 M3302-01en
Coupling part 1 or 2
Coupling part 1 and/or coupling part 2 is stamped with .
2.3.2 Conditions of use
2.3 Safety instructions for a coupling for use in potentially explosive atmospheres
Note also the material-dependent permissible ambient temperature of the rubber disk ele-
ment 5 (5) in Section Rubber disk elements 5 (5) and/or 6 (6) (Page 77).
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
Conditions of use for products with TX marking
The maximum ambient temperature stated in the following tables applies to the temperature
in the direct vicinity of the coupling and the temperature of adjacent components.
1. Gases, vapours or mists
Check the ambient temperature for use of the coupling in the relevant temperature class.
Max. ambient temperature Temperature class Vibratory torque
1)
80 °C T3, T2, T1 T
KW perm
= 0.5 • T
KW catalogue data
80 °C T4 T
KW perm
= 0.3 • T
KW catalogue data
Table 2-2: Temperature classes (TX) for explosive atmospheres as a result of gases, vapours or mists
1)
Observe the reduced vibratory torques if you are using the coupling in a potentially explosive atmosphere. The supplier of
the assembly is responsible for calculating the vibratory torque load.
2. Dust/air mixtures
Check the ambient temperature.
Max. ambient temperature Max. surface temperature Vibratory torque
1)
80 °C 160 °C T
KW perm
= 0.5 • T
KW catalogue data