MTH M50 SERIES - Piping; Operation; Rotation

around the periphery of the
coupling. DO NOT rotate the
coupling.
3. If the maximum offset exceeds
the Parallel dimension in Chart 1
for your sleeve size, loosen the
motor or pump and place thin
metal shims under the motor
or pump feet until the offset is
corrected.
CHART 1
COUPLING TYPES JE, J, S
MAX. RPM & ALLOWABLE MISALIGNMENT
SLEEVE
SIZE
MAXIMUM
RPM
PARALLEL
A
ANGULAR
B-C
3
9200
.010
.035
4
7600
.010
.043
5
7600
.015
.056
6
6000
.015
.070
7
5250
.020
.081
8
4500
.020
.094
4. Torque down the motor or pump.
5. Recheck alignment.
To check the ANGULAR alignment:
(Refer to Figure 2-5)
1. Using a micrometer or caliper,
measure from the outside of one
fl ange to the outside of the other
at intervals around the periphery
of the coupling. DO NOT rotate
the coupling.
Figure 2-5
B
C
Page 505
2. Determine the maximum (B) and
minimum (C) dimensions.
3. If the difference between the
maximum and minimum exceeds
the Angular dimension
in Chart 1
for your sleeve size, loosen the
motor or pump and place thin
metal shims under the motor or
pump feet until the misalignment
is corrected.
4. Torque down the motor or pump.
5. Recheck the parallel alignment
above.
If the parallel or angular misalignment
is great, this is an indication of
baseplate distortion and must be
corrected fi rst, refer to 2C Leveling.
After all leveling and alignment
operations have been completed,
piping can begin. After the piping has
been completed, refer to 2E1 Piping
Alignment. Alignment of the unit
must be rechecked to make certain
that no piping strains are causing
distortion. After approximately
two weeks of operation, check the
alignment again to make sure that
temperature changes, piping strain,
or foundation variations have not
caused misalignment. If alignment
has been maintained over this period,
the pump and motor can be doweled
to the baseplate.
2E Piping
2E1 Alignment
It is important that all piping be lined
up and not forced into place. It is
recommended that you begin piping
at the pump. If the lines are ended at
the pump, particularly if the last piece
is cut a little too short or long, the
pump will be forced to meet the pipe
and strain or distortion will result.
2E2 Piping Support
Never allow the pump to support
piping. Other means such as
pipe hangers and pipe supports
should be used to carry piping to
avoid misalignment and distortion.
Consideration should be given to
thermally induced expansion and
contraction, particularly in long runs
of straight pipe.
2E3 Piping Size
In general, outlet and especially inlet
pipe sizes should be equal to or
larger than those of the pump.
M50 • L50 SERIES
3.
Operation
Operation
FLEXIBLE COUPLED PUMPS
CLOSE COUPLED PUMPS
A.
Rotation
B.
Inlet and Outlet Locations
C.
Foreign Material
D.
Electrical
E.
Adjustments
F.
Cooling Water
G.
Priming
H.
Starting
I.
Stopping
3A Rotation
The standard direction of rotation
for the pump is right-handed, or
clockwise when looking at the motor
end of the pump. A rotation arrow,
refer to Figure 3-1, is located on the
pump to indicate the correct direction
of rotation.
Operating the pump in reverse will
cause substantial performance
variations and can damage the
pump.
Always confi rm correct motor rotation
prior to connection of the coupling.
If this is not possible, perform a fi nal
rotation check as follows:
1. Jog the motor briefl y.
2. Observe rotation as the unit
comes to a stop.
3. Rotation should be in the
direction of the arrow.
If the motor operates in the wrong
direction:
1. Interchange any two leads on a
three-phase motor.
2. On a single-phase motor,
change the leads as indicated on
the connection box cover. Some
single-phase motors may not be
reversible.
3B Inlet and Outlet Locations
(Refer to Figure 3-1)