KSB Vitaprime, Инструкция по установке и эксплуатации

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6 Commissioning/Start-up/Shutdown
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Vitaprime
6.1.6 Shutdown
CAUTION
Heat build-up inside the pump
Damage to the shaft seal!
▷ Depending on the type of installation, the pump set requires sufficient after-
run time – with the heat source switched off – until the fluid handled has
cooled down.
CAUTION
Backflow of fluid handled is not permitted
Motor or winding damage! Mechanical seal damage!
▷
Close the shut-off elements.
ü The shut-off element in the suction line is and remains open.
1. Close the shut-off element in the discharge line.
2. Switch off the motor and make sure the pump set runs down smoothly to a
standstill.
NOTE
If the discharge line is equipped with a non-return or check valve, the shut-off
element may remain open provided that the system conditions and system
regulations are considered and observed.
For prolonged shutdown periods:
1. Close the shut-off element in the suction line.
2. Close any auxiliary lines.
If the fluid to be handled is fed in under vacuum, also supply the shaft seal with
barrier fluid during standstill.
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.
6.1.7 Seal supply system
6.1.7.1 Application
In order to function properly, the mechanical seals require a flushing liquid. The
flushing liquid completely fills the space between the inboard and the outboard
mechanical seal.
6.1.7.2 Requirements to be met by the seal supply system
Pipework routing
requirements
When routing pipework and flexible tubing, prevent any high points or ensure that
high points can be vented separately to prevent dry running of the mechanical seal.
The connecting pipes between the main pipe and the pump must be routed with a
continuously rising slope to assure self-venting of the pipe and the mechanical seal,
respectively.