Alignment Of Pump And Driver - KSB WKLn Installation & Operating Manual

Fig. 3 Aligning a non-spacer type flexible coupling

3.4 Alignment of Pump and Driver

After the baseplates has been fixed in position carefully check the coupling and, if
necessary, realign the pump set.
The coupling must also be checked and the pump set realigned even if the pump and
driver are supplied ready mounted on a common baseplate.
The pump set can be considered correctly aligned when the gap (a or b, see Fig 3)
between each shaft and a straight edge placed axially over both half couplings is the
same at all points in the circumference.
Furthermore, the gap between the two coupling halves must be the same at all
points on the circumference. This can be measured with callipers or a feeler gauge
(see Fig. 3 and 4)
The axial ad radial deviation between the two coupling halves must not exceed
0.1mm.
DANGER
Inadmissible temperatures at the coupling or bearings due to misalignment of the
coupling
Explosion hazard!
Risk of burns!
▷ Make sure that the coupling is correctly aligned at all times.
CAUTION
Misalignment of pump and motor shafts
Damage to pump, motor and coupling!
▷ Always check the coupling after the pump has been installed and connected to
the piping.
▷ Also check the coupling of pump sets supplied with pump and motor mounted
on the same baseplate.
WKLn
Fig. 4 Aligning a flexible spacer coupling
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