Performance Curves - Grundfos ALPHA 26-99 Installation And Operating Instructions Manual

5.6 Performance curves

H
[m]
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
H
[m] [ft]
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Fig. 5 Performance curves, ALPHA2 26-99 circulators*
* ALPHA1 26-99 circulators are externally speed-controlled by an analog 0-10 V DC signal.
10
H
[ft]
50
45
40
35
Proportional pressure 3
30
Proportional pressure 2
25
20
15
10
5
0
0 2 4 6 8 10 12
0.0 0.5 1.0 0.5 2.0 2.5 3.0
Proportional pressure AUTOAdapt
H
50
45
Constant pressure 3
40
35
Constant pressure 2
30
Constant pressure 1
25
20
15
10
5
0
0 2 4 6 8 10 12 14
0.0 0.5 1.0 0.5 2.0 2.5 3.0
Constant pressure AUTOAdapt
Proportional pressure 1
14 16 18 20 22 24 26 28
3.5 4.0 4.5 5.0 5.5 6.0 6.5
16 18 20 22 24 26 28
3.5 4.0 4.5 5.0 5.5 6.0 6.5
Q [US GPM]
Q [m³/h]
7.0
Q [US GPM]
Q [m³/h]
7.0