KSB GIW MDX, Installation & Operating Manual

Page: 18 / 53

MDX [en-US]
18
CAUTION

All components must be level during system operation unless special provisions for bearing lubrication
and oil sealing have been made. After attaching the unit to the foundation and connecting the piping,
the pump and drive train must be thoroughly checked and, if necessary, realigned.

Improper alignment of the unit can cause damage to both the coupling and the unit itself.

Proper alignment must be taken into consideration when using an overhead motor mount accessory. Motor feet
must be firmly supported at each mounting bolt location before the bolts are tightened. Shims should be used to
fill any gaps and ensure solid mounting and vibration prevention.

For optimum performance, the pump should be mounted directly to the
baseplate without shims. The rest of the drive train is then aligned to the pump.
For this reason, GIW baseplate designs generally allow space for shimming
under the gear reducer and motor, but not under the pump itself. The only
exception occurs in cases where regular removal and replacement of the entire
pump is stipulated during the equipment design stage. In these cases, special
instructions for alignment and shimming of the pump may be given on the pump
assembly and/or general arrangement drawings.

Checks and realignment must be done even if pump and motor are supplied
completely assembled and aligned on a common base plate. The correct
distance between the coupling halves and pulleys as specified in the
installation plan must be observed.

The pump set is correctly aligned if a straightedge placed axially on both
coupling halves is the same distance from each shaft at all points around the
circumference. In addition, the distance between the two coupling halves must
remain the same all around the circumference. Use a feeler gauge, a wedge
gauge or a dial micrometer to verify.

The radial and axial deviation (tolerance) between the two coupling halves
should not exceed 0.1 mm (0.004 inch).

Ensure that coupling gaps are properly set in the case of motors with sleeve
bearings.

For V-belt installations, the pulleys are correctly aligned if a straightedge placed
vertically shows a deviation of no more than 1.0 mm (0.04 inch). Both pulleys
must be parallel.
V-belt Pulley Alignment
1 Align
2 Maximum 1mm
3 Straight Edge
4 Gauge
Angular Misalignment Offset Misalignment
RPM Excellent Acceptable Excellent Acceptable
≤ 900 1.0
µm
mm
1.5
µm
mm
100 µm 200 µm
≤ 1200 0.7
µm
mm
1.0
µm
mm
75 µm 150 µm
≤ 1800 0.5
µm
mm
0.7
µm
mm
50 µm 100 µm
≤ 3600 0.3
µm
mm
0.5
µm
mm
25 µm 50 µm
Coupling Alignment Typical industry standard for coupling alignment
5.3.2 Place of Installation
WARNING
The volute casing and shaft seal take on roughly the same temperature as the medium handled.
The shaft seal seal, bearing assembly and bearing housing must not be insulated.
Take the necessary precautions to avoid burns to personnel and adjacent equipment.
1
2
3
4