CAUTION
Abnormal noises, vibrations, temperatures or leakage
Damage to the pump!
▷ Switch off the pump (set) immediately.
▷ Eliminate the causes before returning the pump set to service.
✓ The system piping has been cleaned.
✓ Pump, suction line and inlet tank, if any, have been vented and filled with the
fluid handled.
✓ The filling and venting lines have been closed.
CAUTION
Start-up against open discharge line
Overloading of the motor!
▷ Use a soft starter.
▷ Use speed control.
▷ Make sure the power reserve of the motor is sufficient.
1. Fully open the shut-off element in the suction head/suction lift line.
2.
Close or slightly open the shut-off element in the discharge line.
3. Switch on the motor.
4. Immediately after the pump has reached full rotational speed, slowly open the
shut-off valve in the discharge line and adjust it to comply with the duty point.
DANGER
Seal leakage at operating temperature
Hot or toxic fluid could escape!
▷ After the operating temperature has been reached and/or in the event of
leakage, switch off the pump set and re-tighten the bolts between lantern and
casing.
▷ Check the coupling alignment. Re-align the coupling if required.
5. After the operating temperature has been reached and/or in the event of
leakage, switch off the pump set and re-tighten the bolts between lantern and
casing.
6.
Once the operating temperature has been reached, check the coupling/belt drive
alignment and re-align, if required.
6.1.8 Checking the shaft seal
The mechanical seal only leaks slightly or invisibly (as vapour) during operation.
Mechanical seals are maintenance-free.
The gland packing must leak slightly during operation.
Make sure the throughflow of any sealing and flushing liquid connections provided is
checked continuously.
DANGER
The temperatures at packed glands have risen above the permissible limits
Risk of explosion!
▷ Pack glands properly.
▷ If the gland packing has been retightened to the limit, the gland has to be
completely repacked.
▷ Always use suitable temperature monitoring for packed glands.
If pure graphite packings are used, there must always be some leakage.
Mechanical seal
Gland packing
Pure graphite packing
6 Commissioning/Start-up/Shutdown
KWP
41 of 78
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