Maintenance
7 Maintenance
For pumps in ex plosion-hazard areas (→ ATEX additional
instructions).
Trained service technicians are available for fitting and
repair work. Present a pumped m edium certificate (DIN
safety data sheet or safety certificate) when requesting
service.
7.1 Inspections
The inspection intervals depend on the operational strain
on the pump.
DANGER
Risk of injury due to running pump!
Do not t ouch the runnin g pump.
Do not carry out any work on the running pump.
WARNING
Risk of injury and poisoning due to hazardous pumped
liquids!
Use protective equipment when carrying out any work on
the pump.
1. Check at appropriate intervals:
– Adherence to the minimum flow rate
– Temperature of antifriction bearings < 120 °C
– Normal operating conditions unchanged
– Coupling alignment and condition of elastic parts
2. For trouble-free ope ration, always ensure the following:
– No dry running
– No leaks in the pump, suction and pressure line
– No ca vitation
– Suction-side gate valves open
–Sufficient pump inlet pressure
– No unusual temperature values
– No unusual running noises or vib rations
– No overloading of the system
– No excessive leakage at the shaft seal
– Proper functioning of auxiliary systems
7.2 Maintenance
Service life of the antifriction bearings for operation within
the permissible operating range: > 2 years
Intermittent operation, high temperatures, low viscosities
and aggressive ambient and process c onditions reduce the
service life of antifriction bearings.
Mechanical seals are subject to natural wear, which
strongly depends on the respective o perating conditions.
Therefore, general statements regarding their servi ce l ife
cannot be made.
DANGER
Risk of injury due to running pump!
Do not t ouch the runnin g pump.
Do not c arry out any work on the running pump.
Isolate the motor from its supply voltage and keep it locked
when carrying out any fitting or m aintenance work.
DANGER
Risk of death due to electric shock!
Have all electrical work carried out by qualified electricians
only.
WARNING
Risk of injury and poisoning due to hazardous or hot
pumped liquids!
Use protective equipment when carrying out any work on
the pump.
Allow the pump to cool down completely before commenc-
ing any work.
Make sure the pump is depressurized.
Empty the pump, safely col lect the p umped liquid and dis-
pose of it in accordance with environmental regulations.
260371 – 176-982/0 BA-2020.05 en-US AE 25
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