RADEX
®
-N
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
47110 EN
29 of 31
24
Please observe protection
note ISO 16016.
Drawn:
2019-07-23 Pz/Wb
Replacing:
KTR-N dated 2018-07-17
Verified:
2019-07-26 Pz
Replaced by:
Equipment category
Inspection intervals
3G
3D
For couplings operated in zone 2 or zone 22 the inspection and maintenance intervals of
the usual operating/assembly instructions for standard operation apply. During the
standard operation which has to be taken as a basis of the ignition risk analysis the
couplings are free from any ignition source. For gases, vapours and dusts generated the
permissible glow and ignition temperatures specified in chapter 10.1 have to be
considered and observed.
M2
2G
2D
no gases and vapours of
explosion group IIC
An inspection of the torsional backlash and a visual inspection of the lamina sets must be
performed after 3,000 operating hours for the first time, at the latest 6 months after start-
up of the coupling.
If you note insignificant or no wear on the lamina sets upon this initial inspection, further
inspections can each be performed after 6,000 operating hours or at the latest after 18
months, provided that the operating parameters remain the same.
If you note significant wear during the initial inspection so that it would be
recommendable to replace the lamina sets, find out the cause according to the table
„Breakdowns“, if possible.
The maintenance intervals must be adjusted to the modified operating parameters
without fail.
2G
2D
Gases and vapours of
explosion group IIC
An inspection of the torsional backlash and a visual inspection of the lamina sets must be
performed after 2,000 operating hours for the first time, at the latest 3 months after start-
up of the coupling.
If you note insignificant or no wear on the lamina sets upon this initial inspection, further
inspections can each be performed after 4,000 operating hours or at the latest after 12
months, provided that the operating parameters remain the same.
If you note significant wear during the initial inspection so that it would be
recommendable to replace the lamina sets, find out the cause according to the table
„Breakdowns“, if possible.
The maintenance intervals must be adjusted to the modified operating parameters
without fail.
Illustration 35: RADEX
®
-N type NANA 1
During the visual inspection the lamina sets must be inspected for cracks and screws working loose. Screws
working loose must be tightened at the screw tightening torque indicated (see chapter 4.9).
Regardless of the inspection intervals those lamina sets having fissures have to be replaced by a new lamina set
immediately.
10
Enclosure A
Advice and instructions regarding the use in
potentially explosive atmospheres
10.2 Inspection intervals for couplings in
potentially explosive atmospheres
