PSG Wilden PS220 Series, Инженерия, эксплуатация и обслуживание, Страница: 11 / 28

WIL-11560-E-07
9
WILDEN PUMP & ENGINEERING, LLC
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 the performance
section of this manual 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 the equivalent or larger
than the diameter size of the suction inlet on your Wilden
pump. The suction hose must be non-collapsible, reinforced
type as these pumps are capable of pulling a high vacuum.
Discharge piping should also be the equivalent or larger than
the diameter of the pump discharge which will help reduce
friction losses. It is critical that all fittings and connections
are airtight or a reduction or loss of pump suction capability
will result.
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 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,
every pump should be located in such a way that six key factors
are balanced against each other to maximum advantage.
ACCESS: First of all, the location should be accessible. If it’s 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. Use air pressure up to a maximum of 8.6
bar (125 psig) depending on pumping requirements.
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. Pumping volume
can be estimated by counting the number of strokes per minute
and then multiplying the figure by the displacement per stroke.
MUFFLER: Sound levels are reduced below OSHA specifications
using the standard Wilden muffler. Other mufflers can be
used to further reduce sound levels, 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.
For U.L. listed pumps, all installation must conform with NFPA 30,
NFPA 30A and other applicable codes. All pipe connections are to
be made using U.L. classified gasoline-resistant pipe compound.
Exhaust port is to be connected to pipe or tubing to be routed
outdoors or other location determined to be equivalent.
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
the performance section 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.
SUBMERSIBLE APPLICATIONS: Pro-Flo® SHIFT pumps can be
used for submersible applications when using the Pro-Flo®
SHIFT's single-point exhaust option. Pro-Flo X™ and Turbo-Flo®
Pumps are also available in a single-point exhaust (submersible)
configuration.
NOTE: Pro-Flo
® and Accu-Flo™ pumps are not submersible.
ALL WILDEN PUMPS ARE CAPABLE OF PASSING SOLIDS. A
STRAINER SHOULD BE USED ON THE PUMP INTAKE TO ENSURE
THAT THE PUMP'S RATED SOLIDS CAPACITY IS NOT EXCEEDED.
CAUTION: DO NOT EXCEED 8.6 BAR (125 PSIG) AIR SUPPLY
PRESSURE.
S e c t i o n 6
S U G G E S T E D I N S T A L L A T I O N