11
WILDEN PUMP & ENGINEERING, LLC
WIL-10220-E-02
SUGGESTED INSTALLATION
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SECTION 7B – AIR OPERATION
SUGGESTED OPERATION AND
MAINTENANCE INSTRUCTIONS
OPERATION: Pump discharge rate can be controlled by
limiting the volume and/or pressure of the air supply to the
pump (preferred method). An air regulator is used to regulate
air pressure. A needle valve is used to regulate volume. Pump
discharge rate can also be controlled by throttling the pump
discharge by partially closing a valve in the discharge line of
the pump. This action increases friction loss which reduces
flow rate. This is useful when the need exists to control the
pump from a remote location. When the pump discharge
pressure equals or exceeds the air supply pressure, the
pump will stop; no bypass or pressure relief valve is needed,
and pump damage will not occur. The pump has reached
a “deadhead” situation and can be restarted by reducing
the fluid discharge pressure or increasing the air inlet pres-
sure. The Wilden T4 pump runs solely on compressed air
and does not generate heat, therefore your process fluid
temperature will not be affected.
RECORDS: When service is required, a record should be
made of all necessary repairs and replacements. Over a
period of time, such records can become a valuable tool for
predicting and preventing future maintenance problems and
unscheduled downtime. In addition, accurate records make
it possible to identify pumps that are poorly suited to their
applications.
MAINTENANCE AND INSPECTIONS: Since each applica-
tion is unique, maintenance schedules may be different
for every pump. Frequency of use, line pressure, viscosity
and abrasiveness of process fluid all affect the parts life
of a Wilden pump. Periodic inspections have been found
to offer the best means for preventing unscheduled pump
downtime. Personnel familiar with the pump’s construction
and service should be informed of any abnormalities that are
detected during operation.
AIR OPERATED PUMPS:
To stop the pump from operating in an emergency
situation, simply close the shut-off valve (user supplied) installed in the air
supply line. A properly functioning valve will stop the air supply to the pump,
therefore stopping output. This shut-off valve should be located far enough
away from the pumping equipment such that it can be reached safely in an
emergency situation.
ACCU-FLO™ PUMPS:
Accu-Flo™ pumps function with solenoid valves and
require an electrical control circuit to supply pulses. Under normal operating
conditions, the control circuit is sufficient for starting and stopping the pump.
However, the shut-off valve (user supplied) installed in the air supply line
can be used to stop the pump if necessary. Therefore, it should be located
far enough away from the pumping equipment such that it can be reached
safely in an emergency situation.
NOTE:
In the event of a power failure, the shutoff
valve should be closed, if the restarting of the
pump is not desireable once power is regained.
