6 Commissioning/Start-up/Shutdown
44 of 72
HPK
NOTE
If the discharge line is equipped with a check valve, the shut-off element in the
discharge line may remain open, provided the site's requirements and regulations
are taken into account and observed.
NOTE
If shut-off is not possible, the pump will run in reverse direction.
The reverse runaway speed must be lower than the rated speed.
For prolonged shutdown periods:
1.
Close the shut-off element in the suction line.
2.
Close the auxiliary connections.
If the fluid to be handled is fed in under vacuum, also supply the shaft seal with
barrier fluid during standstill.
Only turn off the cooling liquid supply after the pump has cooled down.
CAUTION
Risk of freezing during prolonged pump shutdown periods
Damage to the pump!
▷
Drain the pump and the cooling/heating chambers (if any) or otherwise protect
them against freezing.
6.4 Returning to service
For returning the equipment to service, observe the sections on commissioning/start-
up
(
ð
Section 6.3, Page 36)
and the operating limits.
(
ð
Section 6.2, Page 34)
In addition, carry out all servicing/maintenance operations before returning the
pump (set) to service.
(
ð
Section 7, Page 45)
WARNING
Failure to re-install or re-activate protective devices
Risk of personal injury from moving parts or escaping fluid!
▷
As soon as the work is complete, re-install and/or re-activate any safety-relevant
and protective devices.
NOTE
If the pump has been out of service for more than one year, replace all elastomer
seals.
Summary of Contents for HPK
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