1. Minimum speed
2. Medium speed
3. Maximum speed
Performance characteristic curve
Select the speed that best matches the design performance for the system
or loop for which you are installing the pump.
SPEED 3
SPEED 2
100
(kPa) (M) (FT)
50
0
10
5
0
0
0 10 20 30 40 50 60
015
3210
40
30
20
10
0
(gpm)
(m3/hr)
(l/s)
CENTRIFUGAL PUMP SERIES NRF-36
SPEED 1
Figure 4: Centrifugal pump series NRF-36
SPEED 3
SPEED 2
SPEED 1
100
(kPa) (M) (FT)
50
0
10
5
0
0
0 10 20 30 40 50 60
015
3210
40
30
20
10
0
(gpm)
(m3/hr)
(l/s)
Figure 5: Centrifugal pump series NRF-45
Commissioning, Startup, Operation, and Shutdown
NRF
™
-25,36,45/NBF
™
-25,36, and 45 Circulator Installation, Operation, and Maintenance Manual 13
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