Inspection Intervals For Couplings In Potentially Explosive Atmospheres - KNF N680 EX Manual

10 Enclosure A
Advice and instructions regarding the use in
10.2 Inspection intervals for couplings in
Equipment category
3G
3D
M2
2G
2D
No gases and vapours of
explosion group IIC
M2
2G
2D
Gases and vapours of
explosion group IIC
Hubs, clamping hubs or similar types without feather keyways may be used in category 3
only and are marked with category 3 accordingly.
Please observe protection
note ISO 16016.
ROTEX
Operating/Assembly instructions
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.
An inspection of the torsional backlash and a visual inspection of the flexible
spider/DZ elements must be performed after 3,000 operating hours for the first
time, at the latest after 6 months after start-up of the coupling.
If you note insignificant or no wear on the spider/DZ elements 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 spider/DZ elements, find out the cause
according to the table „Breakdowns", if possible.
The maintenance intervals must be adjusted to the modified operating
parameters without fail.
An inspection of the torsional backlash and a visual inspection of the flexible
spider/DZ elements must be performed after 2,000 operating hours for the first
time, at the latest after 3 months after start-up of the coupling.
If you note insignificant or no wear on the spider/DZ elements 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 spider/DZ elements, find out the cause
according to the table „Breakdowns", if possible.
The maintenance intervals must be adjusted to the modified operating
parameters without fail.
Drawn: 2019-07-02 Pz/Wb
Verified: 2019-07-23 Pz
®
potentially explosive atmospheres
potentially explosive atmospheres
Inspection intervals
Replacing:
Replaced by:
KTR-N 40210 EN
Sheet: 22 of 27
Edition: 23
KTR-N dated 2017-09-06