Goulds Pumps 3296M - IOM - Manual (Page 20)

4. Allow grout to set.
5. Fill remainder of baseplate with grout. Remove air
as before (Fig. 9B).
6. Allow grout to set at least 48 hours.
7. Tighten foundation bolts.
Alignment Check
Re-check alignment before continuing, using methods
previously described.
PIPING
Guidelines for piping are given in the “Hydraulic
Institute Standards” (Edition 14, Centrifugal pump
section) and should be reviewed prior to pump
installation.
1. All piping must be supported independently and
must line up naturally with the pump flanges.
s
! WARNING
Never draw piping into place by forcing at the
flanged connections of the pump. This will impose
dangerous strains on the unit and cause
misalignment between pump and driver. Pipe
strain can adversely effect the operation of the
pump. That could result in serious personal injury
and damage to equipment.
2. Piping runs shall be designed to minimize friction
losses.
3. DO NOT make final connection of piping to pump
until grout has hardened and pump and driver
hold-down bolts have been tightened.
4. Piping that handles hot liquids requires proper
installation of expansion loops/joints so that linear
expansion of piping will not cause mis-alignment.
5. Piping should be arranged to allow pump flushing
and draining prior to the removal of pump for
servicing.
6. System should be thoroughly cleaned prior to
installation.
7. Gasket installation and materials must be suitable
for the service.
SUCTION PIPING
Properly installed suction piping is a necessity for
trouble free pump operation. Suction piping should be
flushed BEFORE connection to the pump.
1. Use of elbows close to the pump suction flange
should be avoided. There should be a minimum of
2 pipe diameters of straight pipe between the
elbow and suction inlet. Any elbows used should
be long radius.
2. Size suction pipe one or two sizes larger than
pump suction, with a reducer at suction flange.
Suction piping must never be of smaller diameter
than the pump suction.
3. Reducers, if used, must be eccentric at pump
suction flange with sloping side down.
4. Suction strainers, when used, must have a net
“free area” of at least three times the suction pipe
area.
5. Separate suction lines are recommended when
more than one pump is operating from the same
source of supply.
16
3296 M Group 6/05
Fig. 9B