Danfoss APP Series Installation, Operation And Maintenance Manual page 79

Operation guide
9 Enclosure A
Advice and instructions regarding the use in
9.2 Inspection intervals for couplings in
Explosion group
3G
3D
II 2GD c IIB
T4, T5, T6
Illustration 15: BoWex-ELASTIC
Please observe protection
note ISO 16016.
© Danfoss | 2023.03
Installation, Operation and Maintenance APP 53-92 pumps
BoWex-ELASTIC
Operating/Assembly instructions
Type HEW, HEW Compact and HEW-ZS
For couplings which are classified in category 3G or 3D the operating and assembly in-
structions that are usual for standard operation apply. During the standard operation which
has to be subject to the ignition risk analysis the couplings are free from any ignition
source. Merely the temperature increase produced by self-heating and depending on the
coupling type has to be considered:
An inspection of the torsional backlash and a visual inspection of the elastomer set must be
performed after 3000 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 elastomer part upon this initial inspection, further
inspections can each be performed after 6000 operating hours or at the latest after 18
months, provided that the operating parameters remain the same.
If you note significant wear with the initial inspection so that it would be recommendable to
replace the elastomer part, please find out the cause according to the table „Breakdowns",
if possible.
The maintenance intervals must be adapted to the modified operating parameters without
fail.
BoWex-ELASTIC
®
type HEW1
Drawn: 2017-04-24 Shg/Hk
Verified: 2017-04-24 Shg
®
KTR-N
Sheet:
Edition:
potentially explosive atmospheres
potentially explosive atmospheres
Inspection intervals
®
for BoWex-ELASTIC : T = 35 K
®
 Here the backlash between the hub and
the nylon spline must be inspected via tor-
sional backlash, each separately from the
driving and the driven side.
The friction/wear may only be X
original spline thickness before the elasto-
mer part must be replaced.
When reaching the torsional backlash
S , the elastomer part must be re-
max.
placed immediately, irrespective of the in-
spection intervals.
 Visual inspection of the elastomer part
(cracks, holes or anything similar).
Replacing:
Replaced by:
180R9346 | AQ240486503020en-001702 | 79
40114 EN
19 of 22
7
of the
max.
KTR-N dated 2013-06-10