PSG Dover Accu-Flo, Инженерия, эксплуатация и обслуживание

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WIL-10070-E-03
Wilden
®
12
Suggested Installation, Operation, Maintenance and Troubleshooting
All Wilden pumps are manufactured with a variety of materials for the air
distribution system, liquid path and elastomers. This variety is offered to
satisfy the temperature, chemical compatibility, abrasion and flex life
requirements for most applications. Consult manual for available materials
and temperature limitations for this pump model.
For Accu-Flo™ models only, all wiring used to operate the pump should be
placed and connected according to all applicable electrical codes. It is
important that the wiring be of adequate gauge to carry the current required
to operate the pump. In addition, it is necessary that the electrical power
supply be large enough to supply the current required to operate the pump.
Wiring should be above ground level if possible (in case of fluid spill or
leakage), and all wiring and connections which could become wet or damp
should be made watertight.
The suction pipe used for installation should be sized equal to, or greater
than, the pump liquid inlet connection. This will minimize pump cavitation
and potential blockages of the pump inlet. The discharge piping should also
be sized equal to, or greater than, the pump liquid discharge connection. If
the pump is to be used in a self-priming application, be sure that all
connections are airtight and that the suction lift is within the pump’s ability.
(Consult manual for suction lift information.)
NOTE: Materials of construction and elastomer materials have an
effect on suction lift parameters
.
Installation
Months of careful planning, study and selection efforts can result in
unsatisfactory pump performance if installation details are left to chance.
Premature failure and long term dissatisfaction can be avoided if reasonable
care is exercised throughout the installation process.
Location
Noise, safety, and other logistical factors usually dictate that "utility"
equipment be situated away from the production floor. Multiple installations
with conflicting requirements can result in congested utility areas, leaving
few choices for siting additional pumps.
Within the framework of these and other existing conditions, every pump
should be located in such a way that four key factors are balanced against
each other to maximum advantage:

Access: First of all, the location should be accessible. If it is easy to
reach the pump, maintenance personnel will have an easier time
carrying out routine inspections and adjustments. Should major
repairs become necessary, ease of access can play a key role in
speeding the repair process and reducing total downtime.

Air Supply: Every pump location should have an air line large
enough to supply the volume of air necessary to achieve the desired
pumping rate. (Consult manual for performance information.) The
use of an air filter before the pump will ensure that the majority of
pipeline contaminants will be
eliminated. For best results, the pump
should use an air filter, regulator system.
Sound levels are reduced below OSHA specifications using the
standard Wilden muffler.

Elevation: Selecting a site that is well within the pump’s dynamic lift
capability will assure that a loss-of-prime condition will be avoided. In
addition, pump efficiency can be adversely effected if proper attention
is not given to site location.

Piping: Final determination of the pump site should not be
made until the piping problems of each possible location have
been evaluated. The impact of current and future installations
should be considered ahead of time to make sure that
inadvertent restrictions are not created for any remaining sites.
The best choice possible will be a site involving the shortest and
straightest hook-up of suction and discharge piping. Unnecessary
elbows, bends, and fittings should be avoided. Pipe sizes should
be selected so as to keep friction losses within practical limits. All
piping should be supported independently of the pump to avoid
damage. In addition, the piping should be aligned so as to avoid
placing stress on the pump fittings.
Flexible hose can be installed to aid absorbing the forces created
by the natural reciprocating action of the pump. If the pump is to be
bolted down to a solid location, a mounting pad placed between
the pump and the foundation will assist in minimizing pump
vibration. Flexible connections between the pump and rigid piping
will also assist in minimizing pump vibration. If quick-closing valves
are installed at any point in the discharge system, or if pulsation
within a system becomes a problem, a Wilden Equalizer
®
surge
dampener should be installed to protect the pump, piping and
gauges from surges and water hammer. Installation of a tee at the
discharge of the pump will allow the addition of an Equalizer to the
system at a later date without requiring piping modifi- cations.
Installation of inlet and discharge isolation valves are also
recommended to make service and repair easier.
Pumps in service with a positive suction head are most efficient
when pressure is limited to 0.4-0.7 bar (7-10 psig). Premature
diaphragm failure may occur if positive suction exceeds these
recommended pressures.
A STRAINER SHOULD BE USED ON THE SUCTION LINE OF
THE SYSTEM IF THERE IS A POSSIBILITY THAT SOLIDS
ENTERING THE PUMP MAY EXCEED THE PUMP’S SOLIDS
HANDLING CAPABILITIES.
PLEASE READ AND FOLLOW ALL CAUTIONS NOTED IN
THIS MANUAL.
Pump should be thoroughly flushed before installing into
process line.
Blow out air line for 10 to 20 seconds before attaching pump to
clear all pipe line debris.
Section 6