8
SECTION 7A
INSTALLATION
The Model T2 Metal pump has a 25 mm (1”) inlet and 19 mm
(3/4”) outlet and is designed for flows to 132 lpm (35 gpm).
The T2 Metal pump is manufactured with wetted parts of
aluminum or stainless steel. The center section of the T2
Metal pump is of aluminum or polypropylene construction.
The air distribution system consists of a brass air valve
body, aluminum air valve piston, Glyd™ rings and a bronze
center section bushing. A variety of diaphragms, valve balls,
valve seats, and o-rings are available to satisfy temperature,
chemical compatibility, abrasion and flex concerns.
The suction pipe size should be at least 25 mm (1”) diam-
eter or larger if highly viscous material is being pumped.
The suction hose must be non-collapsible, reinforced type
as the T2 is capable of pulling a high vacuum. Discharge
piping should be at least 19 mm (3/4”); larger diameter can be
used to 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 perfor-
mance 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 that “utility” equipment be situated away from 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 four key
factors are balanced against each other to maximum advan-
tage.
1. 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.
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 (see pump performance chart). Use
air pressure up to a maximum of 8.6 bar (125 psig) depend-
ing upon pumping requirements. The use of an air filter
before the pump will ensure that the majority of any pipeline
contaminants will be eliminated. For best results, the pumps
should use an air filter, regulator, and lubricator system.
3. ELEVATION: Selecting a site that is well within the pump’s
suction 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 elevation
(see pump performance chart).
4. PIPING: Final determination of the pump site should not
be made until the piping problems of each possible loca-
tion 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 UL listed pumps, all installations must conform with
NFPA 30, NFPA 30A, and all other applicable codes. All pipe
connections are to be made using UL 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 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 inde-
pendently of the pump. In addition, it should line up without
placing stress on the pump fittings.
Expansion joints 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 mounting 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 mini-
mizing 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.
The T2 can be used in submersible applications only when
both wetted and non-wetted portions are com
patible with
the material being pumped. If the pump is to be used in a
submersible application, a hose should be attached to the
pump’s air exhaust and the exhaust air piped above the liquid
level.
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. Note: Materials of construction
and elastomer material have an effect on suction lift param-
eters. Please refer to pump performance data.
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
0.8 bar (11 psig) and higher.
THE MODEL T2 WILL PASS 3.2 mm (1/8”) SOLIDS. WHEN-
EVER THE POSSIBILITY EXISTS THAT LARGER SOLID
OBJECTS MAY BE SUCKED INTO THE PUMP, A STRAINER
SHOULD BE USED ON THE SUCTION LINE.
CAUTION: DO NOT EXCEED 8.6 BAR (125 PSIG) AIR
SUPPLY PRESSURE. (3.4 BAR [50 PSIG] FOR UL
MODELS.)
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.
WILDEN PUMP & ENGINEERING, LLC
WIL-10200-E-03
