12
WILDEN PUMP & ENGINEERING, LLC
WIL-10060-E-03
All Wilden pumps are manufactured with a variety of materi-
als 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.
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 Section 6 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 selec-
tion 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 instal-
lation 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 the follow-
ing key factors are balanced against each other to maximum
advantage.
1. 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.
2. 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 Section 6 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.
3. ELEVATION: Selecting a site that is well within the pump’s
dynamic lift capability will assure that a loss-of-prime condi-
tion will be avoided. In addition, pump efficiency can be
adversely effected if proper attention is not given to site
location.
4. 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 inde-
pendently 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.
S e c t i o n 7
S U G G E S T E D I N S T A L L A T I O N
