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WILDEN PUMP & ENGINEERING, LLC
WIL-10270-E-02
SECTION 7A
INSTALLATION – T8 METAL
AIR-OPERATED PUMPS
The Model T8 Metal pump has a 51 mm (2") inlet and 51 mm
(2") outlet and is designed for flows to 617 lpm (163 gpm).
Refer to Section 5 for performance characteristics. The T8
Metal pump is manufactured with wetted parts of aluminum,
316 Stainless Steel, and Cast Iron. The center block of the
T8 Metal pump is constructed of polypropylene, aluminum,
nickel-plated aluminum, PTFE-coated aluminum, or stainless
steel. A variety of diaphragms, valve balls, valve seats and o-
rings are available to satisfy temperature, chemical compat-
ibility, abrasion and flex concerns.
The suction pipe size should be at least 51 mm (2") diameter
or larger if highly viscous material is being pumped. The
suction hose must be non-collapsible, reinforced type as
the T8 is capable of pulling a high vacuum. Discharge piping
should be at least 51 mm (2"); larger diameter can be used to
reduce friction losses. It is critical that all fittings and connec-
tions are airtight or a reduction or loss of pump suction capa-
bility will result.
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 installation
process.
LOCATION: Noise, safety, and other logistical factors usually
dictate where equipment be situated on the production floor.
Multiple installations with conflicting requirements can result
in congestion of utility areas, leaving few choices for siting of
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 advan-
tage.
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 (see Section 5). Use air pressure up
to a maximum of 8.6 bar (125 psig) depending upon pumping
requirements.
For best results, the pumps should use a 5 micron air filter,
needle valve and regulator. The use of an air filter before the
pump will insure that the majority of any pipeline contami-
nants 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 determined 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 speci-
fications using the standard Wilden muffler element. 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 trou-
bles 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 inad-
vertent restrictions are not created for any remaining sites.
The best choice possible will be a site involving the short-
est and the 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. In addition, the piping should be
aligned so as 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 foundation, a mount-
ing pad placed between the pump and 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.
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 model’s ability. Note: Materials of construction and
elastomer material have an effect on suction lift parameters.
Please refer to Section 6 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 effi-
cient 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.
THE MODEL T8 WILL PASS 6.4 mm (1/4") SOLIDS. THE T8
STALLION WILL PASS 19 mm (3/4") SOLIDS. WHENEVER
THE POSSIBILITY EXISTS THAT LARGER SOLID OBJECTS
MAY BE SUCKED INTO THE PUMP, A STRAINER SHOULD
BE USED ON THE SUCTION LINE.
BLOW OUT AIR LINE FOR 10 TO 20 SECONDS BEFORE
ATTACHING TO PUMP TO MAKE SURE ALL PIPE LINE
DEBRIS IS CLEAR. ALWAYS USE AN IN-LINE AIR
FILTER.
CAUTION: DO NOT EXCEED 8.6 BAR (125 PSIG) AIR
SUPPLY PRESSURE. (3.4 BAR [50 PSIG] FOR UL
MODELS.)
CAUTION: DO NOT HANG T8 STALLION PUMPS BY THEIR
HANDLES.
