PSG Dover WILDEN Accu-Flo A2, Инженерия, эксплуатация и обслуживание

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WIL-10060-E-03
Wilden
®
14
Suggested Installation, Operation, Maintenance and Troubleshooting
Operating Principles Behind Accu- Flo™ Pumps
When the solenoid is unpowered, one air chamber is pressurized
with air, while the opposite chamber is exhausted. When electric
power is applied, the solenoid shifts, and the pressurized air
chamber is exhausted while the opposite chamber is pressurized.
By alternately applying and removing power, the solenoid-operated
pump runs like a standard Wilden pump.
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 if
this effect is not taken into account.
There are three coil voltage options available. One coil allows for 24V
DC operation. The second coil option allows for operation with either
12V DC or 24V AC at 60 Hz and the third coil option allows for 110V
AC operation.
ELECTRICAL CONNECTIONS
Plumbing Connections
Suggested Operation and Maintenance
The pump will not shift reliably unless the minimum supply
pressure is provided. For the A2T the minimum supply
pressure for reliable operation is 2.7 bar (40 psig).
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.
INSPECTIONS: Since each application is unique, maintenance schedules may
be different for every pump. Frequency of use, line pressure, viscosity and
abrasiveness of process fluid all effect 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. 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 9 for part numbers.
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