Technical Data; Minimum Water Flow Requirements For Submersible Pump Motors; Guide For Engine-Driven Generators In Submersible Pump Applications - Grundfos SP Series Installation And Operating Instructions Manual

7. Technical data

7.1 Minimum water flow requirements
for submersible pump motors
Casing or
Motor
sleeve I.D.
diameter
[inches]
4
5
4" 6
7
8
6
7
8
6" 10
12
14
16
8
10
8" 12
14
16
10
12
10" 14
16
18
Notes:
• A flow inducer or sleeve must be used if the
water enters the well above the motor or if
there is unsufficient water flow past the motor.
• The minimum recommended water velocity
over 4" motors is 0.25 feet (0.08 m) per
second.
• The minimum recommended water velocity
over 6", 8", and 10" motors is 0.5 (0.15 m) feet
per second.
7.2 Guide for engine-driven generators
Min. flow past
Motor -
the motor
1 or 3 ph
[gpm]
1.2
7
13
21
30
10
28
45
85
140
198
275
10
55
110
180
255
30
85
145
220
305
Notes:
• Table is based on typical 176 °F (80 °C) rise
continuous duty generators with
35 % maximum voltage dip during start-up
of single-phase and three-phase motors.
• Contact the manufacturer of the generator to
assure the unit has adequate capacity to run
the submersible motor.
• If the generator rating is in KVA instead of
kilowatts, multiply the above ratings by 1.25
to obtain KVA.
in submersible pump applications
Generator [kW]
Externally
[hp]
regulated
0.33 1.5
0.5 2.0
0.75 3.0
1 4.0
1.5 5.0
2 7.5
3 10.0
5.0 15.0
7.5 20.0
10.0 30.0
15.0 40.0
20.0 60.0
25.0 75.0
30.0 100.0
40.0 100.0
50.0 150.0
60.0 175.0
75.0 250.0
100.0 300.0
125.0 375.0
150.0 450.0
200.0 600.0
Internally
regulated
1.2
1.5
2.0
2.5
3.0
4.0
5.0
7.5
10.0
15.0
20.0
25.0
30.0
40.0
50.0
60.0
75.0
100.0
150.0
175.0
200.0
275.0
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