Pentax HP Manual Del Usuario página 53

4. INSTALLATION
4.5 • ALIGNMENT OF THE PUMP UNIT
Alignment is usually achieved in our factory; we however suggest you
to check once again after installation.
The final alignment must be carried out after fixing the pipes
connections to the pump.
ATTENTION!
Before checking the final alignment of the unit, verify that the electric
motor rotation and the pump rotation, possibly with motor disconnected.
from the pump, are the same.
DISALIGNMENT
The flexible coupling requires careful alignment.
Incorrect alignment will cause rapid wear of the elastic parts of the flexible coupling,
local bearings and both drive and driven shafts. Alignment tolerances for the standard
coupling range are attached. (see table 2 Fig.27)
Coupling alignment can be achieved as follows (Fig.26)
– Straight edge & feeler gauges.
Hold the straight edge on the outside of the coupling parallel to the axis of rotation and
record both vertical & horizontal misalignment using a feeler gauge. The second feeler
gauge being used to ensure that the gap between the mating faces of each coupling
half is correct.
– Dial indicator & feeler gauge.
A dial indicator can be used instead of the straight edge to record the parallel misalign-
ment of motor semi-coupling, and the feeler gauge to check both axial and angular
clearance between.
– Two dial indicators & feeler.
Check both axial angular misalignements by positioning the dial indicators on both
semicouplings. The distance shall be checked with the gauge.
When the pump is working at high temperature, ie 130° C, pump to prime mover align-
ment must be checked while pump and drive system is hot.
ATTENTION!
In special applications, follow the coupling manufacturers
recommendations when aligning the pump / motor coupling.
8
°
α
60'
S
0,2
MAX ALLOWABLE OFFSET
SIZE OF THE COUPLING
14 20 27 40
60' 55' 50' 45'
0,2 0,2 0,2 0,25
Fig.27
55 88 110 145
40' 35' 35' 30'
0,25 0,30 0,30 0,35
18
Fig.26
180 250 330
30' 25' 25'
0,35 0,40 0,40