Frame-Mounted; Piping Suction - ITT Goulds Pumps 3642 Serie Instrucciones De Instalación, Operación Y Mantenimiento

Frame-Mounted Units:
⁄
1 "(6.35 mm)
4
Finished Grouting
⁄ ⁄
1 3
to "
2 4
(12.7 to 19 mm)
Allowance for
Leveling
Wood
Frame
Figure 1
• Bedplate must be grouted to a foundation with solid
footing. Refer to Figure 1.
• Place unit in position on wedges located at four
points, two below approximate center of driver and
two below approximate center of pump. Adjust
wedges to level unit. Level or plumb suction and
discharge flanges.
• Make sure bedplate is not distorted and final coupling
alignment can be made within the limits of movement
of motor and by shimming, if necessary.
• Tighten foundation bolts finger tight and build dam
around foundation. Pour grout under bedplate
making sure the areas under the pump and motor feet
are filled solid. Allow grout to harden 48 hours before
fully tightening foundation bolts.
• Tighten pump and motor hold-down bolts before
aligning shaft or connecting the piping to pump.
PIPING
• Piping should be no smaller than pump's discharge
and suction connections and kept as short as possible,
avoiding unnecessary fittings to minimize friction
losses.
• All piping MUST be independently supported and
MUST NOT place any piping loads on the pump
NOTICE: DO NOT FORCE PIPING INTO PLACE
AT PUMP SUCTION AND DISCHARGE
CONNECTIONS.
• All pipe joints MUST be airtight.
Grout Hole Base
Grout
Leveling wedges or shims – left in place
Top of foundation –
clean and wet down
Sleeve
Washer
Lug
Piping – Suction
• For suction lifts over 15 ft. (4.6 m), consult pump
performance curve for net positive suction head
R
required (NPSH ).
• If a pipe size larger than pump suction is required, an
eccentric pipe reducer, with the straight side up,
MUST be installed at the pump suction.
• If pump is installed below the liquid source, install a
gate valve in the suction for pump inspection and
maintenance.
NOTICE: DO NOT USE THE GATE VALVE TO
THROTTLE PUMP. THIS MAY CAUSE LOSS
OF PRIME, EXCESSIVE TEMPERATURES
AND DAMAGE TO PUMP, VOIDING
WARRANTY.
• If the pump is installed above the liquid source, the
following MUST be provided:
• To avoid air pockets, no part of the piping
should be above the pump suction
connection.
• Slope the piping upward from liquid
source.
• Use a foot valve or check valve ONLY if
necessary for priming or to hold prime
during intermittent duty.
• The suction strainer or suction bell MUST
be at least three times the suction pipe
diameter area.
• Insure that the size and minimum
submergence over suction inlet is sufficient
to prevent air from entering pump through
a suction vortex. See Figures 2 through 5.
H min.
D
Figure 2
3.0D
min.
1.5D
H min.
min.
D min.
D D
2
Figure 4
H min.
D
Figure 3
H
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1 2 3 4 5 6 7 8 9 10111213141516 V
V = Velocity in feet per second
= GPM x 0.321 PM x 0.4085
Area D 2
Figure 5
3