Franklin Electric’s standard submersible motors, except
Hi-Temp designs (see note below), are designed to
operate up to maximum service factor horsepower in
water up to 86 °F (30 °C). A flow of 0.25 ft/s for 4” motors
rated 3 hp and higher, and 0.5 ft/s for 6-inch and 8 inch motors
is required for proper cooling. Table 6 shows minimum
flow rates, in gpm, for various well diameters and motor
sizes.
If a standard motor is operated in water over 86 °F
(30 °C), water flow past the motor must be increased to
maintain safe motor operating temperatures. See
HOT WATER APPLICATIONS on page 7.
Note: Franklin Electric offers a line of Hi-Temp motors
designed to operate in water at higher temperatures or
lower flow conditions. Consult factory for details.
|
|
Table 6 Required
Cooling Flow
| Minimum
GPM required for motor cooling in water up to 86°F
(30°C). |
Casing
or
Sleeve I.D.
Inches (MM) |
4"
Motor (3-10HP)
.25 ft/sec.
GPM (L/M) |
6"
Motor
.50 ft/sec.
GPM (L/M) |
8"
Motor
.50 ft/sec.
GPM (L/M) |
| 4
(102) |
1.2 (4.5) |
- |
- |
| 5
(127) |
7 (26.5) |
- |
- |
| 6
(152) |
13 (49) |
9 (34) |
- |
| 7
(178) |
20 (76) |
25 (95) |
- |
| 8
(203) |
30 (114) |
45 (170) |
10 (40) |
| 10
(254) |
50 (189) |
90 (340) |
55 (210) |
| 12
(305) |
80 (303) |
140 (530) |
110 (420) |
| 14
(356) |
110 (416) |
200 (760) |
170 (645) |
| 16
(406) |
150 (568) |
280 (1060) |
245 (930) |
.25 ft/sec = 7.62 cm/sec .50
ft/sec = 15.24 cm/sec
1 inch = 2.54 cm |
|
