IOM/CPHM/DEC19/01 ISSUE DATE:14-12-2019
Page 4 | 48 REVISION NO.1
2. INSTALLATION:
2.1 For location, preparing foundation, installation, alignment, piping, general
maintenance, trouble, publication ‘GENERAL INSTRUCTIONS FOR
INSTALLATION, OPERATION AND MAINTENANCE OF KIRLOSKAR
CENTRIFUGAL PUMPS’ which is also printed along with this booklet must be
followed carefully. If the pump is drawing liquid from the vessel under vacuum,
then vacuum equalizing connection piping must be made as per instructions
given in above publication. The external sealing connection to the pump, if
applicable, must be made after installing and before commissioning the pump.
2.2 Mounting and alignment:
A spacer type flexible coupling is recommended to connect pump shaft to the driver.
By using spacer type coupling, the complete rotating unit can be removed from the
volute without removing pump casing or motor and without disconnecting piping
connections. This also avoids any re-alignment of pump and motor after reassembly of
rotating unit. However, other types of coupling can be supplied against request.
Alignment:
ALWAYS REMEMBER “FLEXIBLE COUPLING IS NOT A UNIVERSAL JOINT”.
Correct alignment is essential for the smooth operation of the pump. There are two
types of mis-alignment between the pump shaft and the drive shaft which are –
i. Angular mis-alignment- Shaft with axis concentric but not parallel.
ii. Parallel mis-alignment- Shaft with axis parallel but not concentric. Mis-
alignment is checked by using straight edge as shown in Fig. 1 at 90
0
apart.
STD
COUPLING
STEEL STRAIGHT
EDGE
STEEL STRAIGHT
EDGE
CORRECT
3mm
INCORRECT
PARALLEL
MISALIGNMENT
STEEL STRAIGHT
EDGE
INCORRECT
ANGULAR
MISALIGNMENT
Fig.
1
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