Dover Wilden Original P1, Engineering, Operation & Maintenance, Page: 10 / 28

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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 pressure.
The Wilden P1 pump runs solely on compressed air and
does not generate heat, therefore your process fluid tem-
perature 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 stop-
ping output. This shut-off valve should be located
far enough away from the pumping equipment
such that it can be reached safely in an emer-
gency 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.
WILDEN PUMP & ENGINEERING, LLC WIL-10140-E-08
S U G G E S T E D I N S T A L L A T I O N
S U G G E S T E D O P E R A T I O N & M A I N T E N A N C E