IOM/GK(P)/CONICAL ISSUE DATE: 10.11.2015
Page 19 LAST REV. DATE: 01.08.2019
CORRECT
STEEL STRAIGHT EDGE
INCORRECT PARALLEL
MISALIGNMENT
STEEL STRAIGHT EDGE
STEEL STRAIGHT EDGE
INCORRECT ANGULAR
MISALIGNMENT
ALWAYS REMEMBER “A FLEXIBLE COUPLING IS NOT A UNIVERSAL
JOINT”
Correct alignment is essential for the smooth operation of the pump. There
are two types of misalignment between the pump shaft and the drive shaft,
which are:
1)
Angular misalignment
– shaft with axis concentric, but not parallel.
Maximum allowable misalignment is 1°.
Checking coupling alignment with straight edge
2)
Parallel misalignment
– shaft with axis parallel, but not concentric.
Maximum allowable misalignment is 0.1 mm.
This misalignment is checked by using a straight edge as shown in Figure
given above. Coupling alignment can be checked with dial gauge Indicator.
Alignment should be performed after the base plate has been properly set
and grout has dried thoroughly according to instructions. Final alignment
should be made by shimming under driver side only.
Alignment should be made at operating temperatures.
After final alignment, it is necessary to dowel pump and driver feet to the
baseplate.
FACTORS THAT MAY DISTURB ALIGNMENT
The unit should be periodically checked for alignment. If the unit does not
stay in line after being properly installed, the following are possible reasons:
a) Setting, Seasoning of the foundation.
b) Pipe strains, distorting or shifting of the machines.
c) Wear of the bearings.
3.2.1.1
Before commissioning the pump set, please ensure:
A)
The pipe connections are flushed and tightened properly.
B)
Alignment is proper.
C)
Auxiliary piping connections such as sealing connections, cooling
connections, etc., are made. Details of sealing liquid are given in our
supply order.
Please refer to Figure given below for plugs and piping connections.
