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
0
1
5
3
2
1
0
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
0
1
5
3
2
1
0
40
30
20
10
0
(gpm)
(m3/hr)
(l/s)
Figure 5: Centrifugal pump series NRF-45
Commissioning, Startup, Operation, and Shutdown
14
NRF
™
-25,36,45/NBF
™
-25,36, and 45 Circulator Installation, Operation, and Maintenance Manual
