13
WILDEN PUMP & ENGINEERING CO.
POWER
SUPPLY
REPEAT
CYCLE
TIMER
RELAY
SWITCHED (CONTROL) CONNECTION
GROUND (SAFETY) CONNECTION
COMMON CONNECTION
FLICKER MODE RELAY OR BATCH CONTROLLER
*
*
*
*
*
FLUID INLET
FLUID OUTLET
DISCHARGE
SHUTOFF VALVE
COMBINATION FILTER AND REGULATOR
FLEXIBLE CONNECTION
AIR SUPPLY
SUCTION LINE
DISCHARGE LINE
AIR INLET
FLEXIBLE CONNECTION
INTAKE
SHUTOFF VALVE
FLEXIBLE
CONNECTION
ACCU-FLO™ ELECTRICAL
CONNECTIONS
ACCU-FLO™ PLUMBING
CONNECTIONS
SECTION 7E – ACCU-FLO™
SUGGESTED OPERATION AND
MAINTENANCE INSTRUCTIONS
OPERATION: The speed of the pump is controlled electrically.
Since each stroke is controlled by an electrical signal, the pump
is ideal for batching and other electrically controlled dispensing
applications.
Although the speed of the pump is controlled electrically, the air
pressure is important. Air pressure displaces the fluid, and if the
pressure is insufficient to complete the physical stroke before
an electronic impulse signals the pump to shift, the stroke will
not be completed, and the displacement per stroke will be
reduced. This does not harm the unit in any way, but it may
cause inaccuracy when attempting to batch specific quantities
with high precision.
The solenoid operated pump is permanently lubricated during
assembly, and requires no additional lubrication under normal
operation. If the unit runs under extreme conditions (continuous
operation at high speeds), it may be necessary to relubricate
the center block with a Buna-N
®
compatible NLGI Grade 2
grease every 50 million cycles. Continuous lubrication with a
compatible oil is not harmful, and will provide longer seal life,
but it may flush all grease out of the unit.
A red button on the side of the air valve is a manual override;
when actuated it will shift the valve as if an electric current had
actuated the solenoid.
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. Internal maintenance is not recommended for Accu-
Flo™ solenoid air valves. When worn or damaged, a new air
valve body, coil or terminal connector must be purchased.
Please consult section 9C (page 27) for part numbers.
