User Guide

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
14 NRF
™
-25,36,45/NBF
™
-25,36, and 45 Circulator Installation, Operation, and Maintenance Manual