For pumps equipped with an Air Operated Valve (AOV)
assembly, air must be supplied from the truck air system
via a flow sensing valve. Approximately 70 psi (4.8 bar)
minimum air pressure is required to properly operate
the air operated valve. THE AIR PRESSURE MUST NOT
EXCEED 125 psi (8.6 bar). The sensing valve should
be installed in accordance with the diagram shown in
Figure 4. This system depicts the additional use of a
throttle control which is optional. All adjustments must
be made at normal operating speeds.
5.1 Set the low pressure adjustment first by slowly
closing the nozzle to relieve the air pressure in
the AOV assembly.
5.2 Remove the AOV cap and O-ring (see Appendix
E for parts details).
5.3 Turn the low pressure adjustment stem counter-
clockwise to decrease the bypass pressure and
vice versa to increase the pressure.
5.4 Re-install the O-ring and AOV cap and tighten
securely.
5.5 Open and close the nozzle several times to ensure
proper setting and repeatability.
5.6 Slowly close the delivery nozzle again to relieve
the air pressure in the AOV assembly.
5.7 Remove the AOV cap and O-ring.
5.8 Adjust the locknuts clockwise to decrease delivery
flow rate and/or pressure and vice versa to increase
the flow rate. NOTE: Make sure the locknuts are
securely locked against each other before re-
installing the adjustment stem cap and O-ring.
5.9 Slowly open the delivery nozzle and note delivery
flow rate and/or pressure.
5.10 Repeat steps 5.7–5.9 until desired flow rate and/or
pressure are achieved.
6. You may increase the speed of the pump as long as
it increases the flow through the delivery nozzle. It is
recommended to turn the pump at approximately 575
RPM for optimum performance. However, the pump
can be safely turned to 640 RPM if system conditions
permit (refer to Appendix B).
NOTE: IF PUMP SPEED IS INCREASED, BE CERTAIN
THE METER AND PIPING SYSTEM WILL HANDLE THE
INCREASED FLOW AND PRESSURE!
Installation of the PT-Series
Stationary Pump
NOTE: NEW PUMPS CONTAIN RESIDUAL TEST FLUID
SO IT MAY BE NECESSARY TO FLUSH THE PUMP
PRIOR TO USE. ALL PUMPS SHOULD BE INSTALLED
IN AN AREA THAT IS WELL VENTILATED.
The installation of the PT-Series pumps are simple.
However, in order for the pump to deliver optimum
performance, the principles discussed in this book should
be followed. The piping details provided illustrate methods
proved by hundreds of installations. Your own needs may
require light variations, but every effort should be made to
follow the recommendations identified in this manual.
The foundation for the pump is important. The foundation
must be firm, level and preferably made of concrete. The
suggestions in figure 5 should be observed.
Figure 5
Coupling alignment
The coupling alignment must be near perfect to give
quiet, long-life service to the pump and driver. The pump
and driver shafts are carefully aligned at the factory but
always should be checked after the pump is installed and
before the initial operation.
Lay a straight edge across coupling halves, top, and side;
both positions must line up to be correct (see figure 6). If
misalignment exists, adjust the shims between the pump base
and the foundation until exact alignment is accomplished.
Figure 6
No pump can discharge more liquid than it receives, so
the pump location and the inlet piping must be given
careful attention. If the inlet piping is inadequate to supply
the demand of the pump, you may expect trouble.
The installer and/or the user must take into account
the following:
• The pump must be located as near the storage tank
as possible. The complete inlet line, including the
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