WIL-11060-E-03
Wilden
®
10
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 where equipment
should 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, every pump
should be located in such a way that five key factors are balanced against
each other to maximum advantage:
Access: First, 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 (see Section 5).
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 insure 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, thus allowing trapped
air to bleed off and improving pump performance. Pumping volume
can be set by counting the number of strokes per minute and
multiplying by displacement per stroke.
Sound: Sound levels are reduced using the standard
Wilden muffler element. Other mufflers can be used, but
usually reduce pump performance.
Elevation: Selecting a site that is well within the pump’s
dynamic lift capability will assure that loss-of-prime troubles
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 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 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 stresses 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
should be installed to protect the pump, piping and gauges from
surges and water hammer.
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.
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
ability of the model. Note: Materials of construction and elastomer
material have an effect on suction lift parameters. Please consult
Wilden distributors for specifics.
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.
WHENEVER THE POSSIBILITY EXISTS THAT LARGE SOLID
OBJECTS MAY BE SUCKED INTO THE PUMP, A STRAINER
SHOULD BE USED ONTHE SUCTION LINE.
CAUTION: DO NOT EXCEED RATED MAXIMUM
PRESSURE AS STATED IN CAUTIONS AND
WARNINGS, SECTION 1.
Section 6
