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2E Piping
2E1 Alignment
It is important that all piping be lined up
and not forced into place. It is recom-
mended 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 distor-
tion. 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.
T41 SERIES
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 varia-
tions and can damage the pump.
Always confirm correct motor rotation
prior to connection of the coupling. If
this is not possible, perform a final
rotation check as follows:
1. Jog the motor briefly.
2. Observe rotation as the unit comes
to a stop.
3. Rotation should be in the direction of
the arrow.
3.
Operation
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)
The pump inlet is located on the end
farthest from the motor. The discharge or
“outlet” can be on the top, side, or bottom
depending on the model and construction
of the pump. Normal discharge position is
on top.
3C Foreign Material
All regenerative turbine pumps have close
running clearances in order to maintain
efficiency. Take extra precautions to
insure that no foreign material larger than
25 microns or .001 inches is allowed to
pass through the pump. Even particles of
this size can damage the pump if allowed
to circulate continuously. Regenerative
turbine pumps are not designed for
slurries.
Large particles, weld spatter, and other
material found in new piping systems will
bend the impeller vanes and can some-
times lock up the pump. If a new pump
does not operate properly, the first thing
to check for is damage from foreign
material.
3D Electrical
It is important to be aware of and follow
the appropriate local and national
electrical codes. Do not make wiring
alterations that can affect motor rotation
without reconfirming correct rotation.
3E Adjustments
No adjustments are necessary or
advisable on new pumps other than
those required for installation. Because
of the close fits in regenerative turbine
pumps, it is not uncommon for the
pump to be difficult to turn over by hand
after the internal parts have been
allowed to dry out. New pumps from
the factory are tested using rust
inhibitors to help preclude this possibili-
ty. On site system flushing may remove
these inhibitors and subject the pump to
the risk of lock up, if it is allowed to dry
out. In this case, do the following:
1. Fill the pump with fluid (wait 2
hours).
2. Insert 5/32" Allen wrench into lock
collar setscrew and rotate shaft,
using the Allen wrench as a handle.
(DO NOT LOOSEN THE SET-
SCREW)
Figure 3-1
Outlet
Rotation
Rotation
Outlet
Inlet
Rotation
Inlet
Outlet
Inlet
