SPP Pumps Thrustream - Extended - Manual (Page 10)

Manual No/Rev
W12-005E / 3
Operators Instructions for Horizontal
Extended Thrustream Centrifugal Pumps
Our policy is one of continuous improvement and we reserve the right to alter specifications at any time
Page 8 of 28
4.9 Coupling Alignment
To minimise the bearing loading and to
achieve full coupling and bearing life, it is
recommended that the shafts are aligned as
accurately as possible i.e. well below the
allowable misalignment of the coupling.
Refer
to the coupling manufacturer’s
instructions or proceed generally thus:
1 Lateral Alignment
Mount a dial gauge on
the motor shaft or
coupling
with the
gauge running on the
outer-machined
surface of the pump
coupling.
Turn the
motor shaft and note the total indicator
reading.
2 Angular Alignment
Mount a dial gauge on
the motor shaft or
coupling to run on a
face of the pump
coupling as near the
outside
edge as
possible. Turn the
motor shaft and note the total indicator
reading.
3 Confirm Lateral Alignment
Mount the dial gauge
on the pump shaft or
coupling with gauge
running on the outer-
machined surface of
the motor coupling.
Turn the pump shaft in
the direction of pump
rotation, and note the total indicator reading.
4 Adjustment
For horizontal lateral adjustment move the
motor using the motor jacking screws provided
and for vertical and angular adjustment fit
shims between the motor feet and the
baseplate.
Note Poor alignment is a major factor contributing to
shortening of pump bearing and seal life. It is
recommended that alignment is checked
frequently and maintained at below 10% of the
manufacturer’s specified figure or 0.1mm.
As the pump and motor feet are accurately
machined, any discrepancy may be due to
foreign matter between any of the mating
faces. These should be checked for
cleanliness before assembly and before
resorting to using shims under the motor feet.
Shaft alignment must be checked
again after the final positioning of
the pump unit and connection to pipework as
this may have disturbed the pump or motor
mounting positions.
4.10 Grouting
A space of about 25mm should be left
between the top surface of the foundation
plinth and the underside of the baseplate to
allow for grouting.
Recommended grouting should comprise one
part of cement to two parts of sand, with
sufficient water to produce a heavy creamy
consistency.
After the grout has dried, the alignment should
be checked before commissioning and putting
the pump into operation.
5. Commissioning and Operation
5.1 Commissioning Checks
These checks must be done after first
installation and after pump maintenance that
required removal of the rotating assembly.
Abrasion and Entrapment Hazard
Do NOT touch any moving or rotating
parts. Guards are provided to prevent
access to these parts, where they have
been removed for maintenance they MUST be
replaced before operating the equipment.
Check that the rotating assembly is free to
rotate by hand before connecting the power
supply. Also check that the piping system has
been properly connected with all joints
tightened and instrumentation is in position.
Check that the pump is primed. Pumps should
never be run dry as the pumped liquid acts as
a lubricant for the close running fits
surrounding the impeller. Dry running can
cause serious damage to the pump and
seals.
Prime the pump using an ejector, exhauster or
vacuum pump. If a foot valve is used in the
suction line the pump may be primed by
venting and filling the casing with liquid. Open
the air release valve to bleed any air trapped
in the seal housing, as the seal must be
lubricated and dry running often results in
premature seal failure.
ATTENTION
PUMP
MOTOR
PUMP
MOTOR
PUMP
MOTOR