Flowserve PHL - Manual (Page 14)

PHL USER INSTRUCTIONS ENGLISH 00079593 – 10/10
Page 14 of 31
CHECK FOR SOFT FOOT
This is a check to ensure that there is no undue stress
on the driver holding down bolts; owing to non-level
baseplate or twisting. To check, remove all shims and
clean surfaces and tighten down driver to the
baseplate. Set a dial indicator as shown in sketch and
loosen off the holding down bolt while noting any
deflection reading on the Dial Test Indicator - a
maximum of 0.05 mm ( 0.002 in.) is considered
acceptable but any more will have to be corrected by
adding shims, for example, if the Dial Test Indicator
shows the foot lifting 0.15 mm ( 0.006 in.) then this is
the thickness of shim to be placed under that foot.
Tighten down and repeat the same procedure on all
other feet until all are within tolerance
If the driver is an electric motor with sleeve
bearings then the magnetic centre at which the rotor
will run must be set. This is usually done by lining up a
groove in the shaft to a pointer fixed to the motor body
(refer to Motor Manufacture’s instructions).
4.5.2.3 Alignment using a graph (Reverse
Alignment)
Ensure pump and driver are isolated
electrically and the half couplings are disconnected.
The alignment MUST be checked.
Although the pump will have been aligned at the
factory it is most likely that this alignment will have
been disturbed during transportation or handling. If
necessary, align the motor to the pump, not the pump
to the motor.
The alignment is achieved by adding or removing
shims under the motor feet and also moving the motor
horizontally as required. In some cases where the
alignment cannot be achieved it will be necessary to
move the pump before recommencing the above
procedure.
For couplings with narrow flanges use a dial indicator
as shown below to check both parallel and angular
alignment.
Pa r a l l e l
An g u l a r
Figure 4.8
Maximum permissible misalignment at working
temperature:
Parallel 0.05 mm (0.002 in.) TIR
Angular 0.025 mm (0.001 in.) TIR
Pumps with thick flanged non-spacer couplings can
be aligned by using a straight-edge across the
outside diameters of the coupling hubs and
measuring the gap between the machined faces
using feeler gauges, measuring wedge or calipers.
When the electric motor has sleeve bearings it is
necessary to ensure that the motor is aligned to run
on its magnetic centreline.

Refer to the motor manual for details.
A button (screwed into one of the shaft ends) is
normally fitted between the motor and pump shaft
ends to fix the axial position.
If the motor does not run in its
magnetic centre the resultant additional axial force
may overload the pump thrust bearing.
Complete piping as below and see sections
4.7, “Final shaft alignment check” up to and
including section 5, “Commissioning, start-up,
operation and shutdown” before connecting driver
and checking actual rotation.
4.5.3 Shims
The shims between the equipment feet and
mounting surface should be clean and dry. This is
especially critical for pumps in service for sometime
and need to be realigned. Water, dirt and rust may
change the height of the shim pack over a period of
time. Shims should be made large enough to
support the weight of the equipment on its
mounting foot. Do not use many thin shims as this
may result in a spongy mounting.
Figure 4.9
Recommended shim design
Move the equipment vertically by adding or
removing the calculated thickness of shims. Torque
holding down bolts to required values.
4.5.4 Assemble coupling
a) Assemble coupling as per the manufacturer's
instructions included in Appendix of this
manual.
b) Install coupling guard
4.5.5 Installation check list
a) Level Baseplate?
b) Grout Baseplate - Check Foundation Bolts?
c) Alignment Shaft/Coupling?