Danfoss APP Series Installation, Operation And Maintenance Manual page 77

Operation guide
6 Breakdowns, causes and elimination
Breakdowns
Fracture of elasto-
mer part / spline
Excessive wear on
the spline of the
elastomer part, frac-
ture of elastomer
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.
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
Hazard notes for po-
Causes tentially explosive at-
Operating parame-
ters do not meet with
the performance of
the coupling
Operating error of the
unit
Vibrations of drive
Danger of ignition due to
Ambient/contact tem-
peratures which are
too high for the elas-
tomer part, max.
permissible e. g. T4 =
- 30 °C/+ 80 °C
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
Drawn: 2017-04-24 Shg/Hk
Verified: 2017-04-24 Shg
®
mospheres
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
1) Set the unit out of operation
none 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
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
1) Set the unit out of operation
hot surfaces
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
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
none 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
Replacing:
Replaced by:
KTR-N 40114 EN
Sheet: 17 of 22
Edition: 7
Elimination
KTR-N dated 2013-06-10
180R9346 | AQ240486503020en-001702 | 77