FLENDER COUPLINGS N-EUPEX 3103en, Assembly And Operating Instructions Manual, Page: 14 / 64

Coupling part 10 with electrically insulating flexible elements
The following marking is visible on the outer diameter of coupling part 10:
Flender GmbH II 2G Ex h IIB T6 ... T4 Gb X
D 46393 Bocholt II 2D Ex h IIIC T85 °C ... 110 °C Db X
N‑EUPEX <Year of manufacture> I M2 Ex h Mb X
2.3.2 Conditions of use
Note
Note also the material-dependent permissible ambient temperature of the flexible elements
(12) in accordance with section Flexible elements (12) (Page 59).
A coupling designed in accordance with the ATEX 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
– Explosion group IIA and IIB when electrically insulating flexible elements are used
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.
Table 2-2 Temperature classes (TX) for explosive atmospheres as a result of gases, vapours or mists
Max. ambient temperature Temperature class
80 °C T4
70 °C T5
55 °C T6
Safety instructions
2.3 Safety instructions for a coupling for use in potentially explosive atmospheres
Assembly and operating instructions 3103en
14
Edition 10/2020