User Manual for BPS-4H (High Temp.)
www.levitronix.com
PL-2009-03, Rev04, DCO# 21-101
3.4 Thermal Management
3.4.1 Motor Temperature
For pumping liquids at temperatures up to 150°C the motor must be cooled. The integrated water cooling loop
shall be used for that. Figure 20 shows the pressure/flow characteristic of the cooling circuit. In general, a
water cooling flow of 0.5 - 1 l/min with temperature of 15 - 25°C shall be applied to get workable motor
temperature, which does not reduce MTBF of the components inside the motor.
Figure 20: Pressure/flow characteristic of integrated water cooling loop of motor
(Typical curves measured with for motor BSM-4.10 and representative for motor BSM-4.11.)
Figure 21: Motor temperature with water cooling for pumping sulphuric acid (96%) at 150°C
Note 1: Typical curves measured with CP-4.25 and motor BSM-4.10 with cooling flow of 0.5 l/min and 17°C.
Note 2: Data is representative for CP-4.34/36 with motor BSM-4.11.
Note 3: Temperature measured inside the motor and can be up to 20°C higher at the surface.
0 0.1 0.2 0.3 0.4
0
10
20
30
40
50
60
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0 0.25 0.5 0.75 1 1.25 1.5 1.75
[gallons/min]
[psi]
[bar]
[liters/min]
Cooling Water Temperature Range: 10 - 25
0
C
Recommended Flow Range: 0.5 - 1 liters/min
Maximum Static Pressure: 4 bar
Maximum Static Pressure
77
97
117
137
157
177
197
0 2 4 6 8 10 12 14
25
35
45
55
65
75
85
95
0 5 10 15 20 25 30 35 40 45 50 55
[F]
[gallons/min]
[
0
C]
[liters/min]
Ambient Temp = 25 C
Liquid Temp. = 150 C
Specific gravity = 1.8 g/cm3
Viscosity = ~ 5 cP
-> Motor BSM-4.10 with water cooling
-> Cooling water temp = 17 C
-> Cooling flow = 0.5 l/min
Note:
- Motor temp. Is measured on internal sensor-PCB
- Max. temp. on housing surface can be about 20 C higher.
3000 rpm
2000 rpm
4000 rpm
4500 rpm
Absolute Temperature Limit
Recommended Operational Temperature Limit
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