24 | 180R9346 | AQ240486503020en-001702
© Danfoss | 2023.03
Operation guide
Installation, Operation and Maintenance APP 53-92 pumps
5.
Performance curves
5.1 APP 53 flow at different rpm
If the flow required and the rotation speed (rpm)
of the pump is known, it is easy to select the
pump, fitting the application best, by using the
diagram below.
Furthermore, this diagram shows that the
flow can be changed by changing the rotation
speed of the pump. The flow/rpm ratio is
constant, and the “required” flow can be
obtained by changing the rotation speed to a
corresponding value. Thus, the required rpm
can be determined as:
Required rpm =
Required flow x Rated rpm
Rated flow
100,00
120,00
140,00
160,00
180,00
200,00
220,00
240,00
260,00
280,00
300,00
320,00
340,00
360,00
380,00
400,00
Flo
w
[g
pm]
Speed [RPM]
20,00
25,00
30,00
35,00
40,00
45,00
50,00
55,00
60,00
65,00
70,00
75,00
80,00
85,00
90,00
Fl
ow
[m
3/
h]
Speed [RPM]