General Information; Suction Piping - Burks EC Série Manuel D'installation Et D'utilisation

GENERAL INFORMATION

To the Purchaser:
Congratulations! You are the owner of one of the fi nest
pumps on the market today. Burks® Pumps are products
engineered and manufactured of high quality components.
Over eighty years of pump building experience along
with a continuing quality assurance program combine
to produce a pump which will stand up to the toughest
pumping projects.
This manual will provide helpful information concerning
installation, maintenance, and proper service guidelines.
Receiving:
Upon receiving the pump, it should be inspected for
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damage or shortages. If damage has occurred, fi le a claim
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immediately with the company that delivered the pump.
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If the manual is removed from the crating, do not lose or
L misplace.
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Unless otherwise specifi cally agreed, all capacity, head
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and effi ciency guarantees are based on shop test when
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handling clear, cold, fresh water at a temperature not over
85°F.
Storage:
Short Term - Burks Pumps are manufactured for effi cient
performance following long inoperative periods in storage.
For best results, pumps can be retained in storage, as
factory assembled, in a dry atmosphere with constant
temperatures for up to six (6) months.
Long Term - Any length of time exceeding six (6) months,
but not more than twenty four (24) months. The units
should be stored in a temperature controlled area, a roofed
over walled enclosure that provides protection from the
elements (rain, snow, wind blown dust, etc..), and whose
temperature can be maintained between +40 deg. F and
+120 deg. F.
If extended high humidity is expected to be a problem, all
exposed parts should be inspected before storage and
all surfaces that have the paint scratched, damaged, or
worn should be recoated with a water base, air dry enamel
paint. All surfaces should then be sprayed with a rust-
inhibiting oil.
Service Centers:
For the location of the nearest Burks Service Center, check
your Burks representative or Crane Pumps & Systems, Inc.,
in Piqua, Ohio, telephone (937) 778-8947.
LOCATION OF PUMP
The unit should be mounted in a dry location where it is
easily accessible for inspection and maintenance. Allow
ample clearance around the unit for free air circulation. If a
dry location is not available, mount it on a foundation well
above the wet fl oor. In order to keep the suction line as
short as possible, place the pump close to the source of
supply. Normally after being primed the pump can lift liquid
from a supply 25 feet below the center line of the suction.
However, where liquids at or near their boiling points are
being handled, the supply must be located above the
suction, so that the available NPSH will be greater than
that required by the unit.
ALIGNMENT
If the pump is driven by a fl exible coupling, the angular,
vertical and horizontal alignment must be checked. A
straightedge across the coupling must rest evenly on
both rims of the coupling at the top, bottom and sides.
Alignment should be rechecked shortly after the initial
start-up. Factory assembled units must be realigned at the
job site due to the possibility of distortion in shipment. Final
coupling alignment should be made with the system at
operating temperature.
PIPING
DO NOT Use The Pump As A Piping Support.
It is very important that the pipe be independently
supported near the pump so that no strains will be
transmitted to the unit. External loads caused by the pipe
cause misalignment with subsequent failure of bearings
and internal parts. Suction and discharge sizes are
selected for proper performance of the pumping unit and
are not intended to determine the suction and discharge
pipe sizes. Pipe sizes must be determined by the user
based on the system requirements.

SUCTION PIPING

Suction piping should be short in length, as direct as
possible, and never smaller in diameter than the pump
suction opening. The suction pipe should slope upward
to the pump inlet. A horizontal suction line must have a
gradual rise to the pump. Any high point in the pipe will
become fi lled with air and thus prevent proper operation
of the pump. When reducing the piping to the suction
opening diameter use an eccentric reducer with the
eccentric side down to avoid air pockets. Never use a
straight taper reducer in a horizontal suction line, as
it tends to form an air pocket in the top of the reducer
and the pipe.
Valves in Suction Piping - If the pump is operating
under static suction lift conditions, a foot valve or check
valve should be installed in the suction line to avoid the
necessity of priming each time the pump is started.
A strainer, approximately 20 mesh, should be installed
on the suction side of the pump to prevent chips, scale
or hard foreign particles from entering the pump and
damaging the raceway and impeller.
The pump must never be throttled by the use of a
valve on the suction side of the pump. Valves should be
used only to isolate the pump for maintenance purposes,
and should always be installed in positions to avoid air
pockets.
WARNING: BURKS Turbine Pumps are of the
positive displacement type. When the pump
is operating, liquid will be delivered to the
discharge side of the pump. If the discharge
line is blocked or closed, pressure will build up until
the motor stalls, a pump part breaks or the piping
bursts. To prevent the possibility of equipment
damage or personal injury, a pressure relieving
device of adequate size must be incorporated in the
discharge side of the system.
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