KTR Kupplungstechnik
GmbH
D-48407 Rheine
ROTEX
®
GS
Operating/mounting instructions
KTR-N
Sheet:
Edition:
45510 EN
32of36
15
Please note protection
mark ISO 16016.
Drawn: 15.10.12 Pz Replaced for: KTR-N valid from 08.02.12
Verified: 29.10.12 Pz Replaced by:
Hints and Instructions Regarding the Use in Hazardous Areas
5.5 Marking of Coupling for the Hazardous Area
Couplings for the use in hazardous areas are marked on at least one component completely and on the
remaining components at the outside diameter of the hub or on the front side with an label for the respectively
permitted conditions of use. The flexible spider is excluded.
For reason of the limited space only the symbol is stamped up to size 19.
Short labelling:
(standard)
II 2GD c IIC T X/I M2 c X
Category 3:
II 3G c IIC T6, T5 bzw. T4 - 30 °C ≤ T
a
≤ + 65°C, + 80 °C bzw. +90 °C
II 3D c T 110 °C - 30 °C ≤ T
≤ + 90 °C
Complete labelling:
II 2G c IIC T6, T5 bzw. T4 - 30 °C ≤ T
a
≤ + 65°C, + 80 °C bzw. +90 °C
II 2D c T 110 °C/I M2 c - 30 °C ≤ T
≤ + 90 °C
The former marking
remains valid:
II 2G c IIC T4/T5/T6 - 30 °C ≤ T
a
≤ + 80/60/45 °C
II 2D c T 110 °C/I M2 c - 30 °C ≤ T
≤ + 80 °C
The labelling with Explosion Group llC includes the Explosion Groups llA and llB.
If the coupling part is labelled with in addition to , KTR supplied it unbored or pilot bored.
Before putting the coupling into operation, check the tightness of the setscrews in the hubs, the alignment and the
distance dimension E and correct, if necessary, and also check all screw connections regarding the stipulated
tightening torques dependent on the type of coupling.
If used in hazardous areas the grub screws to fix the hub as well as all screw connections must be
additionally secured against self-loosening, e. g. glue with Loctite (medium strength).
Last but not least, the coupling protection against unintended contact must be fixed.
The cover must be electrically conductive and be included in the equipotential bonding. Bellhousings (magnesium
part below 7,5 %) made from aluminium and damping rings (NBR) can be used as connecting element between
pump and electric motor. The cover may only be taken off after having stopped the unit.
During operation, please pay attention to
• strange running noises
• occurring vibrations.
If the couplings are used in dust explosive areas and in mining the user must make sure that there is no
accumulation of dust in a critical quantity between the cover and the coupling. The coupling must no operate in an
accumulation of dust.
For covers with unlocked openings on the upper side no light metals may be used if the couplings are used as
appliances of appliance group ll (if possible, from stainless steel).
If the couplings are used in mining (appliance group l M2), the cover must not be made from light metal. In
addition, it must be resistant to higher mechanical loads than if it is used as appliance of appliance group ll.
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