Dover Wilden Advanced H38 Інжиніринг, експлуатація та технічне обслуговування - Сторінка 7
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S e c t i o n 5
S U G G E S T E D O P E R A T I O N & M A I N T E N A N C E
The H38/3200D has a 10 mm (3/8") 37° flared tube fitting
inlet and outlet and is designed for discharge pressure to
220.6 bar (3,200 psig). Refer to Section 5 for performance
characteristics. The H38/3200D pump is manufactured with
wetted parts of aluminum. The H38/3200D is available with
a polypropylene air valve and aluminum center section.
The suction pipe size should be at least 10 mm (3/8")
diameter or larger if highly viscous material is being pumped.
The suction hose must be non-collapsible, reinforced type
as the H38/3200D is capable of pulling a high vacuum.
Discharge piping should be at least 10 mm (3/8") and must
have a minimum pressure rating of 220.6 bar (3,200 psig);
larger diameter can be used to reduce friction losses. It
is critical that all fittings and connections are airtight or a
reduction 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 usu-
ally dictate where equipment will be situated on the produc-
tion 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 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
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.
WIL-11181-E-04
MUFFLER: Sound levels are reduced below OSHA speci-
fications 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 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 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.
The best choice possible will be a site involving the short-
est and 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 pip-
ing should be aligned so as to avoid placing stress on the
pump fittings.
If the pump is to be bolted down to a solid location, a
mounting pad placed between the pump and the founda-
tion will assist in minimizing pump vibration.
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.
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 MODEL H38/3200D SHOULD NOT BE USED WITH
MEDIA CONTAINING SOLIDS. WHENEVER THE POSSIBILITY
EXISTS THAT SOLID OBJECTS MAY BE SUCKED INTO THE
PUMP, A STRAINER SHOULD BE USED ON THE SUCTION
LINE.
CAUTION: THE H38/3200D PUMP IS DESIGNED FOR
OPEN LOOP SYSTEMS.
CAUTION: DO NOT EXCEED 8.6 BAR (125 PSIG) AIR
SUPPLY PRESSURE.
5
WILDEN PUMP & ENGINEERING, LLC