Operation
3.
CLOSE COUPLED PUMPS
FLEXIBLE COUPLED PUMPS
A. Rotation
B. Inlet and Outlet Locatrions
C. Foreign Material
D. Electrical
E. Adjustments
F. Cooling Water
G. Priming
H. Starting
I. Stopping
3A Rotation
The standard direction of rotation of 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.
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prior to connection of the coupling. If this
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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 direc-
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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
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bottom depending on the model and
construction of the pump. Normal dis-
charge position is on top.
3C Foreign Material
All regenerative turbine pumps have
close running clearances in order to
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-
tions 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 continue. Regenera-
tive 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 sometimes lock up the
pump. If a new pump does not operate
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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
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Select starter heaters and wiring for the
maximum current the motor can use at
full service factor loads. Regenerative
turbine pumps will typically use extra
power for a period until they run in. This
can take three to four weeks depending
on the duty cycle. During this period,
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balanced position.
3E Adjustments
No adjustments are required or advis-
able on new pumps. Because of the
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it is not uncommon for the pump to be
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have been allowed to dry out inside.
New pumps from the factory are tested
using rust inhibitors to preclude this
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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
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2. Loosen the thrubolts exactly one turn.
3. Jog the pump momentarily
using the on/off buttons if so
equipped.
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without damage, unless foreign mate-
rial has entered the pump.
5. If possible, spin the pump (or operate
with minimal or zero discharge
pressure) while the thrubolts are
retightened exactly one turn.
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Because of the large areas of close
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it takes only microscopic residue to
produce resistance to rotation. Once
loosened, this material is quickly dis-
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hydraulic center. If these procedures
have been followed, no damage will
have resulted from "breaking loose" the
impeller.
3F Cooling Water
When the pump is used to pump hot
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to cooling the seals and/or selecting
materials that will give satisfactory seal
life. The actual temperature at the seal
faces, the most critical area, will always
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-
VWTG+HUGCNƀWUJKPINKPGUJCXGPQVDGGP
installed, heat can build up in the seal
faces to a degree that may destroy the
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wear. In some cases it is necessary to
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seal manufacturers charts for guidance
or to selection data in the MTH catalog
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boiling point.
3G Priming
Pumps should not be operated
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liquid. Damage to parts of the pump that
depend on liquid for their lubrication can
occur. Impellers can seize quickly when
a pump is run dry. Without lubrication,
seal faces can be damaged from heat
buildup.
Pumps can be easily primed with a
vacuum pump. An ejector or liquid ring
vacuum pump is recommended for this
purpose because they are not damaged
if liquid enters them.
Figure 3-1
Outlet
Rotation
Inlet
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T31 SERIES
146
Summary of Contents for P2131
Page 121: ... THIS PAGE INTENTIONALLY LEFT BLANK 115 ...
Page 130: ...SECTION A APPENDIX 124 ...
Page 131: ...A 1 Swagelok Fitting Installation Instructions 125 ...
Page 135: ...A 2 PLC Data Sheet 129 ...
Page 141: ...A 3 VERIFY Product Information 135 ...
Page 147: ...A 4 WRS Pump Information 141 ...
Page 158: ...A 5 Vacuum Leak Test Troubleshooting Guide 152 ...