52
The relationships between the head and the water flow rated,the PMW Return and the water flow
rated are shown in the graph below.
10.5 The circulation pump
4- 10kW
(Pump maintains maximum output)
Flow rate
˄
m
3
/h
˅
Water resistance(KPa)
2.87
29.1
2.71
34.2
2.49
42.0
2.16
53.8
1.89
63.4
1.53
77.4
1.16
83.8
0.91
84.8
0.73
85.0
0.59
85.0
0.50
84.9
0.41
84.7
12- 16kW
(Pump maintains maximum output)
Flow rate
˄
m
3
/h
˅
Water resistance(KPa)
2.97
32.1
2.81
36.7
2.6
43.4
2.41
49.5
2.25
54.6
2.05
60.8
1.85
67.4
1.65
74.4
1.48
80.7
1.26
84.3
1.04
85.4
0.87
85.7
0.69
85.9
0.51
86.0
