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WIL-10181-E-07

Wilden

Suggested Installation, Operation, Maintenance and Troubleshooting

Wilden pumps are designed to meet the performance requirements of
even the most demanding pumping applications. They have been
designed and manufactured to the highest standards and are available
in a variety of liquid path materials to meet your chemical resistance
needs. Refer to "Performance " on page 8 for an in-depth analysis of
the performance characteristics of your pump. Wilden offers the widest

variety of elastomer options in the industry to satisfy temperature,
chemical compatibility, abrasion resistance and flex concerns.

The suction pipe size should be at least equal to or larger than the
diameter size of the suction inlet on your Wilden pump. The suction
hose must be a non-collapsible, reinforced type because these pumps
are capable of pulling a high vacuum. Discharge piping should also be
equal to or larger than the diameter of the pump discharge, which will
help reduce friction losses

CAUTION:

All fittings and connections must be airtight.

Otherwise, pump suction capability will be reduced or lost.

Months of careful planning, study and selection efforts can result in
unsatisfactory pump performance if installation details are left to
chance. You can avoid premature failure and long-term dissatisfaction
by exercising reasonable care throughout the installation process

Location

Noise, safety and other logistical factors usually dictate where
equipment will be situated on the production floor. Multiple installations
with conflicting requirements can result in congestion of utility areas,
leaving few choices for additional pumps.

Within the framework of these and other existing conditions, locate
every pump in such a way that the following six key factors are
balanced against each other to maximum advantage:

•

Access:

First, the location should be accessible. If it’s easy

to reach

the pump, maintenance personnel will be able to perform routine
inspections and adjustments more easily. If 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. For best results, the pumps

should use a 5μ (micron)

air filter, needle valve and regulator. The use of an air filter before
the pump will ensure that the majority of any pipeline contaminants
will be eliminated.

•

Solenoid Operation:

When operation is controlled by a solenoid

valve in the air line, three-way valves should be used. This valve
allows trapped air between the valve and the pump to bleed off,
which improves pump performance. You can estimate pumping
volume by counting the number of strokes per minute, and then
multiplying that figure by the displacement per stroke.

•

Muffler:

Using the standard Wilden muffler, sound levels are reduced

below OSHA specifications. You can use other mufflers to reduce

sound levels farther, but they usually reduce pump performance.

•

Elevation:

Selecting a site that is well within the pump’s dynamic lift

capability will assure that loss-of-prime issues will be eliminated. In
addition, pump efficiency can be adversely affected if proper
attention is not given to site location.

•

Piping:

Final determination of the pump site should not be made

until the piping challenges 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 to keep friction losses within practical limits. All piping

should be supported independently of the pump. In addition, the
piping should be aligned to avoid placing stress on the pump fittings.

Flexible hose can be installed to aid in 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 surge suppressor (SD Equalizer)
should be installed to protect the pump, piping and gauges from
surges and water hammer.

If the pump is to be used in a self-priming application, make sure
that all connections are airtight and that the suction lift is within the

model’s

ability.

NOTE:

Materials of construction and elastomer material

have an effect on suction lift parameters. Please refer to

"Performance " on page 8 for specifics.

When pumps are installed in applications involving flooded suction or
suction head pressures, a gate valve should be installed in the
suction line to permit closing of the line for pump service.

Pumps in service with a positive suction head are most efficient when
inlet pressure is limited to 0.5

–

0.7 bar (7

–

10 psig). Premature diaphragm

failure may occur if positive suction is 0.7 bar (10 psig) and higher.

NOTE:

Pro-Flo

and Accu-

Flo™ pumps do not have

single-point exhaust option and are not submersible.

CAUTION: