Coupling part 2 or 4
Coupling part 2 or coupling part 4 is stamped with
.
Undrilled or predrilled coupling
A coupling part with Ex marking, the letter "U" and the Flender order number has been delivered
undrilled or predrilled.
Note
Undrilled or predrilled coupling with Ex marking
Flender only supplies an undrilled or predrilled coupling with Ex marking on the condition that
the customer assumes the responsibility and liability for correct finishing work in a declaration
of exemption.
2.3.2 Conditions of use
Note
Note also the material-dependent permissible ambient temperature of the flexible elements
(12) in accordance with sections N-EUPEX flexible elements (12) (Page 65) and N-EUPEX
DS flexible elements (12) (Page 66).
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.
Safety instructions
2.3 Safety instructions for a coupling for use in potentially explosive atmospheres
N-EUPEX / N-EUPEX DS 3100en
Operating Instructions 10/2017 15
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