180R9346 | AQ240486503020en-001702 | 77
© Danfoss | 2023.03
Operation guide
Installation, Operation and Maintenance APP 53-92 pumps
BoWex-ELASTIC
®
Operating/Assembly instructions
Type HEW, HEW Compact and HEW-ZS
KTR-N
Sheet:
Edition:
40114 EN
17 of 22
7
Please observe protection
note ISO 16016.
Drawn:
2017-04-24 Shg/Hk
Replacing:
KTR-N dated 2013-06-10
Verified:
2017-04-24 Shg
Replaced by:
Breakdowns
Causes
Hazard notes for po-
tentially explosive at-
mospheres
Elimination
Fracture of elasto-
mer part / spline
Operating parame-
ters do not meet with
the performance of
the coupling
none
1) Set the unit out of operation
2) Review the operating parameters and
select a bigger coupling (consider mount-
ing space)
3) Assemble new coupling size
4) Inspect alignment
Operating error of the
unit
1) Set the unit out of operation
2) Disassemble the coupling and remove
remainders of the elastomer part
3) Inspect coupling components and re-
place coupling components that are
damaged
4) Insert elastomer part, assemble coupling
components
5) Instruct and train the service staff
Excessive wear on
the spline of the
elastomer part, frac-
ture of elastomer
Vibrations of drive
Danger of ignition due to
hot surfaces
1) Set the unit out of operation
2) Disassemble the coupling and remove
remainders of the elastomer part
3) Inspect coupling components and re-
place coupling components that are
damaged
4) Insert elastomer part, assemble coupling
components
5) Inspect alignment, adjust if necessary
6) Find out the reason for vibrations
Ambient/contact tem-
peratures which are
too high for the elas-
tomer part, max.
permissible e. g. T4 =
- 30 °C/+ 80 °C
1) Set the unit out of operation
2) Disassemble the coupling and remove
remainders of the elastomer part
3) Inspect coupling components and re-
place coupling components that are
damaged
4) Insert elastomer part, assemble coupling
components
5) Inspect alignment, adjust if necessary
6) Inspect and adjust ambient/contact tem-
perature
e. g. contact with
aggressive liq-
uids/oils, influence by
ozone, too high am-
bient temperature
etc. causing a physi-
cal change of the
elastomer part
none
1) Set the unit out of operation
2) Disassemble the coupling and remove
remainders of the elastomer part
3) Inspect coupling components and re-
place coupling components that are
damaged
4) Insert elastomer part, assemble coupling
components
5) Inspect alignment, adjust if necessary
6) Make sure that other physical modifica-
tions of the elastomer part are excluded
If you operate with a worn elastomer part (see chapter 9.3 and 9.4) a proper operation meeting the
explosion protection requirements and the directive 2014/34/EU is not ensured.
6
Breakdowns, causes and elimination