501-
F
00 Page 4/12
INSTALLATION
CHECK VALVES
The use of check valves or foot valves in the supply tank is
not recommended with self-priming, positive displacement
pumps.
If the possibility of liquid backflow exists when the pump is off,
a check valve in the pump discharge piping is recommended
because the pump can motor in the reverse rotation and
create undue stress on all attached components. Never start
a pump when it is rotating in the reverse rotation as the added
starting torque can damage the pump and related equipment.
PUMP MOUNTING
A solid foundation reduces noise and vibration, and will
improve pump performance. On permanent installations it is
recommended the pumping unit be secured by anchor bolts
as shown in Figure 4. This arrangement allows for slight
shifting of position to accommodate alignment with the
mounting holes in the base plate.
For new foundations, it is suggested that the anchor bolts be
set in concrete. When pumps are to be located on existing
concrete floors, holes should be drilled into the concrete to
hold the anchor bolts.
When installing units built on channel or structural steel type
bases, use care to avoid twisting the base out of shape when
anchor bolts are tightened. Shims should be used under the
edges of the base prior to tightening of the anchor bolts to
prevent distortion.
BOLT
BASE
STANDARD
PIPE
WASHER
Figure 4 – Pipe Type Anchor Bolt
COUPLING ALIGNMENT
The pump must be directly coupled to a gear reducer and/or
driver with a flexible coupling. Both angular and parallel
coupling alignment MUST be maintained between the pump,
gear, motor, etc. in accordance with manufacturer’s
instructions. See Figure 5.
1. Parallel alignment: The use of a laser alignment tool or
dial indicator is preferred. If a laser alignment tool or dial
indicator is not available, use a straightedge. Turn both
shafts by hand, checking the reading through one
complete revolution. Maximum offset should be less
than .005" (0.127 mm).
2. Angular alignment: Insert a feeler gauge between the
coupling halves. Check the spacing at 90° increments
around the coupling (four checkpoints). Maximum
variation should not exceed 0.005" (0.127 mm). Some
laser alignment tools will check angular alignment as
well.
3. Replace the coupling guards after setting alignment.
Figure 5 – Coupling Alignment
Do not operate
without guard
in place
OPERATION WITHOUT GUARDS IN
PLACE CAN CAUSE SERIOUS
PERSONAL INJURY, MAJOR
PROPERTY DAMAGE, OR DEATH.
PUMP ROTATION
NOTICE:
CONFIRM CORRECT PUMP ROTATION BY CHECKING
THE PUMP ROTATION ARROWS AND FLOW DIRECTION
RESPECTIVE TO PIPING FLOW DIRECTION. DO NOT
OPERATE THE PUMP IN REVERSE ROTATION TO
REVERSE THE DIRECTION OF FLOW.
1. Determine direction of flow where the pump will be
installed.
2. Confirm pump is installed in piping so that the flow will
pass through the pump from inlet to outlet. The inlet of
the pump has “INLET” cast in the cylinder and the outlet
for the LDF Model pump is through the ¾” NPT port on
the top of the cylinder.
3. Briefly “jog” pump with pump driver. Check rotation of
pump driver with respect to rotation arrow on pump.
4. If rotation of the driver and pump do not match the pump
rotation arrows, the pump driver must be reversed.
Содержание LDF1A
Страница 11: ...501 F00 Page 11 12 NOTES ...
