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WILDEN PUMP & ENGINEERING, LLC
WIL-10260-E-02
®
SUGGESTED INSTALLATION
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 regu-
late 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 pres-
sure, 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 pressure. 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 application
is unique, maintenance schedules may be different for every
pump. Frequency of use, line pressure, viscosity and abrasive-
ness 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
shoud 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 desirable once power is regained.
