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Copyright © 2021 White Knight Fluid Handling | A Graco company
Version 1.0.1 | 3 December 2021 | Page 14
187 E. 670 S., Kamas, UT 84036
435.783.6040 888.796.2476
3.2.1. Influence of liquid temperature on Pump temperature.
Motor temperature is affected by the temperature of the liquid being pumped. The motor temperature at any
liquid temperature can be estimated by using information in the graph found in section 3.2.2, the graph below, and
the following equation.
𝑇
𝑚𝑜𝑡𝑜𝑟
= 𝑀𝑜𝑡𝑜𝑟
𝑇𝑒𝑚𝑝
+ (𝑇
𝐿𝑖𝑞𝑢𝑖𝑑
− 30) ∗ 𝑇
𝐺
+ (𝑇
𝐴𝑚𝑏𝑖𝑒𝑛𝑡
− 20)
Where
T
motor
=
Estimated motor temperature
Motor
Temp
=
Temperature of Motor found in graph located in section 3.2.2.
T
Liquid
=
Temperature of the liquid in
°
C at which motor temperature is wished to be estimated.
T
G
=
Temperature Gradient found on graph located below.
T
Ambient
=
Ambient temperature in
°
C at which motor temperature is wished to be estimated.
Passive Cooling Temp. Gradiant
T
G
= 0.72
Active Cooling Temp. Gradiant
T
G
= 0.43
0
20
40
60
80
100
120
15
25
35
45
55
65
75
85
95
Mo
to
r
Te
m
p
era
tu
re
(°
C)
Water Temperature (°C)
Liquid Temperature Vs. Motor Temperature