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WILDEN PUMP & ENGINEERING CO.

SUGGESTED INSTALLATION

SUCTION

NEEDLE
VALVE

MUFFLER

PIPE CONNECTION
(STYLE OPTIONAL)

DISCHARGE

FLEXIBLE
CONNECTION

COMBINATION
FILTER,
REGULATOR &
LUBRICATOR

AIR
SHUT
OFF
VALVE

GAUGE
(OPTIONAL)

EQUALIZER
SURGE DAMPENER
(OPTIONAL)

FOOTPAD

SHUT OFF
VALVE

SECTION 7B – AIR OPERATION

SUGGESTED OPERATION AND
MAINTENANCE INSTRUCTIONS

OPERATION: Pump discharge rate can be controlled by limit-
ing 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 pres-
sure 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 T8
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 appli-
cations.

MAINTENANCE AND INSPECTIONS: Since each application
is unique, maintenance schedules may be different for every
pump. Frequency of use, line pressure, viscosity and abra-
siveness 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. Person-
nel familiar with the pump’s construction and service should
be informed of any abnormalities that are detected during
operation.

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 start-
ing 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 desirable once power is regained.

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.

.O.

.U. FILM FROM

RB GRAPHICS (SEE CHANGE ORDER)