PSG Dover WILDEN SANIFLO PS15 Hygienic Series, Engineering, Operation & Maintenance

Page: 15 / 44

WIL-12630-E-04
Wilden ®
15
Suggested Installation, Operation, Maintenance and Troubleshooting
NOTE: In the event of a power failure, the air shut-off
valve should be closed, if 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 air 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 air shut-off valve should be located far enough
away from the pumping equipment such that it can be reached
safely in an emergency situation.
Operation
The Pro-Flo SHIFT pumps are pre-lubricated and do not require
in- line lubrication. Additional lubrication will not damage the pump.
However, if the pump is heavily lubricated by an external source,
the pump’s internal lubrication maybe washed away. If the pump
is then moved to a nonlubricated location, it may need to be
disassembled and re-lubricated as described in "Disassembly/
Reassembly" on page 16.
Pump discharge rate can be controlled by limiting the volume and/or
pressure of the air supply to the pump. An air regulator is used to
regulate air pressure. A needle valve is used to regulate volume.
Pump discharge rate also can 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.
(See "Performance " on page 9.) 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. Wilden Pro-Flo SHIFT pumps run
solely on compressed air and do not generate heat.
Therefore, your process fluid temperature will not be affected.
Maintenance and Inspections
Because each application is unique, maintenance schedules maybe
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.