No leakage:
Immediately switch off pump set!
Loosen the gland follower and repeat commissioning.
Checking the leakage
After the leakage has been adjusted, monitor the leakage for about two hours at
maximum fluid temperature.
Check that enough leakage occurs at the gland packing at minimum fluid pressure.
6.1.12 Shutdown
✓ The shut-off element in the suction line is and remains open.
✓ On pump sets with double mechanical seal, apply the required pressure
specified in the general arrangement drawing to the mechanical seal chamber
also during standstill.
✓ Also ensure quench liquid supply is ON during pump standstill.
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 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.
6.2 Operating limits
DANGER
Non-compliance with operating limits for pressure, temperature, fluid handled and
speed
Explosion hazard!
Hot or toxic fluid could escape!
▷ Comply with the operating data indicated in the data sheet.
▷ Never use the pump for handling fluids it is not designed for.
▷ Avoid prolonged operation against a closed shut-off element.
▷ Never operate the pump at temperatures, pressures or rotational speeds
exceeding those specified in the data sheet or on the name plate unless the
written consent of the manufacturer has been obtained.
6 Commissioning/Start-up/Shutdown
MegaCPK
39 of 74
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