Grundfos MMS 10000, Installation And Operating Instructions Manual, Page: 7 / 32

English (GB)
7
4.3 Liquid temperatures/cooling
The maximum liquid temperature and the minimum
flow velocity past the motor are-displayed in the
following table.
Grundfos recommends that the motor be installed
above the well screen in order to achieve proper
motor cooling by liquid passing the motor.
If there is a risk of sediment, such as sand, build-up
around the motor, a flow sleeve should be used in
order to ensure proper cooling of the motor.
* At an ambient pressure of minimum 1 bar (0.1 MPa).
** At an ambient pressure of minimum 2 bar (0.2 MPa).
In case the stated flow velocity cannot be
achieved, a flow sleeve must be installed
Motor
Installation
Flow past the
motor
[m/s]
Vertical Horizontal
MS402
MS4000 (T40)
MS6000 (T40)
0.15
40 °C
(105 °F)
40 °C
(105 °F)
MS6000P T60 0.15
60 °C
(140 °F)
60 °C
(140 °F)
MS4000I (T60)*
MS6000 (T60)*
1.00
60 °C
(140 °F)
Flow sleeve recommended
60 °C
(140 °F)
Flow sleeve recommended
MS6000 (T60)** 0.15
60 °C
(140 °F)
Flow sleeve recommended
60 °C
(140 °F)
Flow sleeve recommended
MMS6
PVC
windings
0.15
25 °C
(86 °F)
25 °C
(86 °F)
0.50
30 °C
(95 °F)
30 °C
(95 °F)
PE/PA
windings
0.15
45 °C
(113 °F)
45 °C
(113 °F)
0.50
50 °C
(122 °F)
50 °C
(122 °F)
MMS8000 to
12000
PVC
windings
0.15
25 °C
(77 °F)
25 °C
(77 °F)
0.50
30 °C
(86 °F)
30 °C
(86 °F)
PE/PA
windings
0.15
40 °C
(104 °F)
40 °C
(104 °F)
0.50
45 °C
(113 °F)
45 °C
(113 °F)
For 37 kW MMS6 (only PVC windings),
110 kW MMS8000 and 170 kW
MMS10000, the maximum liquid
temperature is 5 °C lower than stated in
the table above. For 190 kW MMS10000,
220-250 kW MMS12000/50 Hz and
MMS12000/60 Hz, the temperature is
10 °C lower than stated.