Goulds Pumps 3498 - IOM - Manual (Page 23)

LOCATION
The pump should be installed as near the suction supply as
possible, with the shortest and most direct suction pipe
practical. The total dynamic suction lift (static lift plus
friction losses in suction line) should not exceed the limits
for which the pump was sold.
The pump must be primed before starting. Whenever
possible, the pump should be located below the fluid level
to facilitate priming and assure a steady flow of liquid. This
condition provides a positive suction head on the pump. It
is also possible to prime the pump by pressurizing the
suction vessel.
!
Pumps must be fully primed at all times during
operation.
When installing the pump, consider its location in relation
to the system to assure that sufficient Net Positive Suction
Head (NPSHA) is available at the pump inlet connection.
Available NPSH must always equal or exceed the required
NPSH (NPSHR) of the pump.
The pump should be installed with sufficient accessibility for
inspection and maintenance. A clear space with ample head
room should be allowed for the use of an overhead crane or
hoist sufficiently strong to lift the unit.
NOTE: Allow sufficient space to be able to dismantle
pump without disturbing the pump inlet and discharge
piping.
Select a dry place above the floor level wherever possible. Take
care to prevent pump from freezing during cold weather when
not in operation. Should the possibility of freezing exist during a
shut-down period, the pump should be completely drained, and
all passages and pockets where liquid might collect should be
blown out with compressed air.
Make sure there is a suitable power source available for the
pump driver. If motor driven, the electrical characteristics of the
power source should be identical to those shown on motor data
plate.
FOUNDATION
It is of prime importance to provide a foundation permanent
and rigid enough to absorb any vibration and maintain the
true alignment of a direct connected unit. (Hydraulic
Institute Standards recommends the foundation weigh at
least five [5] times the weight of the pump unit.) Usually a
concrete foundation on a solid base with embedded
foundation bolts of the proper size located with the aid of
general arrangement drawings is quite satisfactory.
A substantial foundation and footing should be built to suit
local conditions. It should form a rigid support to maintain
alignment.
Vertical Pumps – Foundation bolts should be sized and
accurately located. Each foundation bolt should be located
in a bushing two diameters larger than the bolt to allow free
movement of the bolt in conforming to the mounting holes
in the pedestal. When vertical pumps are used with
intermediate shafting, the motor mount baseplate should be
securely attached to the floor or support structure.
Horizontal Pumps – The foundation should be poured
without interruption to within 3/4 to 1-1/2 inches of the
finished height as shown in Fig. 7. The top surface of the
foundation should be well scored and grooved before the
concrete sets; this provides a bonding surface for the grout.
Foundation bolts should be set in concrete as shown in Fig. 7.
A 4-inch long tube around the bolts at the top of the concrete
will allow some flexibility in bolt alignment to match the holes
in the baseplate. Allow enough bolt length for grout, shims,
lower baseplate flange, nuts, and washers. The foundation
should be allowed to cure for several days before the baseplate
is shimmed and grouted.
20
3498 IOM 12/04
Fig. 7