Viessmann Vitosol
100 Technical Manual page 50

3.2 Sizing pipe diameters and circulation pump
Collector pressure drop
(relative to water)
Vitosol 100 flat collector, type s/w 2.5
400
300
200
100
80
60
50
40
30
20
10
0.6 1 2
Flow rate in l/min
Vitosol 250 vacuum tube collector
40
30
20
10
5
3
2
1
0.5
0.3
0.2
0.5 1 2 3 4 5
Flow rate in l/min
50
Vitosol 200 vacuum tube collector
20
10
5
3
2
1
0.5
0.3
0.2
0.1
0.5 1
3
Flow rate in l/min
A 1 × type D 10
B 1 × type D 20
C 1 × type D 30
10
Vitosol 300 vacuum tube collector
C B
200
A
100
80
60
50
40
30
20
10
2 3 4 5 10
D 2 × type H 30
E 1 × type H 20 and 1 × type H 30
F 2 × type H 20
G 1 × type H 30
H 1 × type H 20
D
8
6
5
4
3
2
1
1 2 3 4 5 6
Flow rate in l/min
VITOSOL
E
F
G
H
10