Xylem IM228 R03 Model e-SV (esv) - Manual (Page 11)

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3. FLANGE ALIGNMENT AND LOADING
Angular alignment of the suction and discharge
flanges can best be accomplished using calipers at the
bolt locations. See figure below.
NOTICE: DO NOT DRAW PIPING INTO PLACE BY
FORCING THE PUMP SUCTION OR DIS-
CHARGE CONNECTIONS.
4. PIPING
Discharge and suction piping should be no smaller
than the respective pump opening and should be
kept as short as possible, avoiding unnecessary
fittings to minimize friction losses.
NOTICE: PIPING MUST BE INDEPENDENTLY SUP-
PORTED AND NOT PLACE ANY PIPING
LOADS ON THE PUMP.
If suction piping larger than pump suction is re-
quired, an eccentric pipe reducer, WITH THE
STRAIGHT SIDE UP, must be installed at the pump
suction.
If the pump is installed below the liquid source,
install a full flow isolation valve in the suction piping
for pump inspection or maintenance.
NOTICE: DO NOT USE THE ISOLATION VALVE
ON THE SUCTION SIDE OF THE PUMP
TO THROTTLE PUMP. THIS MAY CAUSE
LOSS OF PRIME, EXCESSIVE TEMPERA-
TURES, DAMAGE TO PUMP AND VOID
WARRANTY.
If pump is installed above the liquid source, the
following MUST be provided:
To avoid air pockets, no part of the suction pip-
ing should be above the pump suction.
On any horizontal piping sections, slope piping
upward from liquid source.
All suction pipe joints MUST be airtight.
Use a foot valve for priming, or for holding
prime during intermittent duty.
The suction strainer or suction bell MUST be at least
3 times the suction pipe diameter.
Insure that the size and minimum liquid submer-
gence, over the suction inlet, is sufficient to prevent
air from entering through a suction vortex. See typi-
cal suction piping Figures 1 through 4.
Install a discharge check valve, suitable to handle the
flow and liquids, to prevent backflow.
Install an appropriately sized gate valve, AFTER the
discharge valve, to regulate the pump capacity, for
pump inspection and for maintenance.
When a pipe increaser is required, install between
the check valve and the pump discharge.
5. SHAFT ALIGNMENT – MOTOR TO PUMP
When the pump is purchased less motor, the pump
will be supplied with a motor assembly shim posi-
tioned between the motor adapter and the coupling.
To assemble the motor to the pump remove the
plastic shipping straps, the 2 stainless steel coupling
guard halves, and the expanded polyurethane.
Insure that the motor assembly shim is properly posi-
tioned between the coupling and the motor adapter.
If the motor assembly shim is not available, a 0.203"
(5 mm) shim may be used to locate the pump shaft
assembly and to set the correct height. See figures
below.
Figure 1 Figure 2
Figure 3 Figure 4
H min.
D
H min.
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
H = Min.
Submer
gence in feet
8D
min.
4D
min.
= GPM x 0.321
Area
GPM x 0.4085
D 2
min. 3D
2 V = Velocity in feet per second
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 V
H
H min.
3D
D
D
3D