Grundfos DMH 251 Installation And Operating Instructions Manual page 36

15. Dosing curves
The dosing curves on the following pages are trend curves.
They apply to:
• performance of single pump (the flow rate is doubled for the
double pump)
• water as dosing medium
• zero point of pump Q for specified pressure, see table below
0
• standard pump version.
Abbreviation Description
Q Dosing flow
Q Zero point of the pump
0
h Stroke length
DMH 251
10
Q [l/h]
8
6
4
2
0
0 10 20 30 40 50 60 70 80 90 100
Fig. 44 DMH 5-10 (50 Hz), Q
10
Q [l/h]
8
6
4
2
0
0 10 20 30 40 50 60 70 80 90 100
Fig. 45 DMH 5-10 (60 Hz), Q
18
Q [l/h]
16
14
12
10
8
6
4
2
0
0 10 20 30 40 50 60 70 80 90 100
Fig. 46 DMH 13-10 (50 Hz), Q
36
3 bar
3bar 10 bar
10bar
h [%]
= 3 bar
0
3 bar
3bar
10 bar
10bar
h [%]
= 3 bar
0
3 bar
3bar
10 bar
10bar
h [%]
= 3 bar
0
18
Q [l/h]
16
14
12
10
8
6
4
2
0
0 10 20 30 40 50 60 70 80 90 100
Fig. 47 DMH 13-10 (60 Hz), Q
28
Q [l/h]
24
20
16
12
8
4
0
0 10 20 30 40 50 60 70 80 90 100
Fig. 48 DMH 19-10 (50 Hz), Q
28
Q [l/h]
24
20
16
12
8
4
0
0 10 20 30 40 50 60 70 80 90 100
Fig. 49 DMH 19-10 (60 Hz), Q
36
Q [l/h]
32
28
24
20
16
12
8
4
0
0 10 20 30 40 50 60 70 80 90 100
Fig. 50 DMH 24-10 (50 Hz), Q
3 bar
10bar
10 bar
3bar
h [%]
= 3 bar
0
3 bar
10 bar
3bar
10bar
h [%]
= 3 bar
0
( )
0
3 bar
10 bar
3bar
10bar
h [%]
= 3 bar
0
3 bar
3bar
10 bar
10bar
h [%]
= 3 bar
0