Technical Data; Minimum Water Flow Requirements For Submersible Motors; Guide For Engine-Driven Generators In Submersible Pump Applications - Grundfos SP Instrucciones De Instalación Y Funcionamiento

10. Technical data

10.1 Minimum water flow requirements
for submersible 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 flow sleeve must be used if
the water enters the well above the motor or
if there is insufficient 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.
24
10.2 Guide for engine-driven
Min. flow past
the motor
[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:
•
•
•
generators in submersible pump
applications
1- or Generator [kW]
3-phase
motor 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
Table is based on typical +176 °F (+80 °C)
rise continuous duty generators with 35 %
maximum voltage dip during startup of
single-phase and three-phase motors.
Contact the manufacturer of the generator to
make sure 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.
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