KSB Etanorm-R, Installation & Operating Manual

Page: 38 / 78

6 Commissioning/Start-up/Shutdown
38 of 78
Etanorm-R
1222.8/13-EN
4. Immediately after the pump has reached full rotational speed, slowly open the
shut-off element in the discharge line and adjust it to comply with the duty
point.
CAUTION
Misalignment of pump and coupling
Damage to pump, motor and coupling!
▷ When the operating temperature has been reached, switch off the pump set
and check the coupling alignment.
5. Check the coupling alignment and re-align the coupling, if required.
6.1.6 Checking the shaft seal
Mechanical seal The mechanical seal only leaks slightly or invisibly (as vapour) during operation.
Mechanical seals are maintenance-free.
Double mechanical seal
DANGER
Excessive temperature of barrier fluid, with double mechanical seal
Explosion hazard!
Excessive surface temperature
▷
For pumps with double mechanical seal, make sure that the barrier fluid's
temperature does not exceed 60 °C.
Gland packing The gland packing must drip slightly during operation.
CAUTION
Excessive leakage or no leakage at the gland packing
Damage to the pump!
▷ Excessive leakage: Re-tighten the gland follower until the required leakage rate
is reached.
▷ No leakage: Switch off the pump set immediately.
▷ It is not recommended to operate pump sets with gland packings in
combination with a frequency inverter / variable speed system.
Pure graphite packing If a pure graphite packing is used, there must always be some leakage.
Table 10: Leakage rate of the pure graphite packing
Quantity Values
Minimum 10 cm³/min
Maximum 20 cm³/min
Adjusting the leakage
Prior to commissioning 1. Only lightly tighten the nuts of the gland follower by hand.
2. Use a feeler gauge to verify that the gland follower is mounted centred and at a
right angle to the shaft.
ð The gland must leak after the pump has been primed.
After five minutes of
operation