Flow rate
(total collector area)
Flow velocity in m/s
Pipe dimensions
l/h l/min DN10 DN13 DN16 DN20 DN25 DN32 DN40
Dimensions
12 x 1 15 x 1 18 x 1 22 x 1 28 x 1.5 35 x 1.5 42 x 1.5
125 2.08 0.44 — — — — — —
150 2.50 0.53 0.31 — — — — —
175 2.92 0.62 0.37 0.24 — — — —
200 3.33 0.70 0.42 0.28 0.18 — — —
250 4.17 0.88 0.52 0.35 0.22 — — —
300 5.00 1.05 0.63 0.41 0.27 — — —
350 5.83 — 0.73 0.48 0.31 — 0.11 —
400 6.67 — 0.84 0.55 0.35 0.23 0.13 0.09
450 7.50 — 0.94 0.62 0.40 0.25 0.14 0.10
500 8.33 — — 0.69 0.44 0.28 0.16 0.12
600 10.00 — — 0.83 0.53 0.34 0.19 0.14
700 11.67 — — 0.97 0.62 0.40 0.22 0.16
800 13.33 — — — 0.71 0.45 0.25 0.19
900 15.00 — — — 0.80 0.51 0.28 0.21
1000 16.67 — — — — 0.57 0.31 0.23
1500 25.00 — — — — 0.85 0.47 0.35
2000 33.33 — — — — 1.13 0.63 0.46
2500 41.67 — — — — — 079 0.58
3000 50.00 — — — — — 0.94 0.70
Recommended pipe dimensions
Pressure drop of the pipework
For water/glycol mixtures at temperatures higher than 50 °C.
Flow rate
(total collector area)
Pressure drop per m pipe length (including valves) in mbar/m / kPa/m
Pipe dimensions
l/h DN10 DN13 DN16 DN20 DN25
Dimensions
12 x 1 15 x 1 18 x 1 22 x 1 28 x 1.5
100 4.6/0.46
125 6.8/0.68
150 9.4/0.94
175 12.2/1.22
200 15.4/1.54 4.4/0.44
225 18.4/1.84 5.4/0.54
250 22.6/2.26 6.6/0.66 2.4/0.24
275 26.8/2.68 7.3/0.73 2.8/0.28
300 9.0/0.90 3.4/0.34
325 10.4/1.04 3.8/0.38
350 11.8/1.18 4.4/0.44
375 13.2/1.32 5.0/0.50
400 14.8/1.48 5.6/0.56 2.0/0.20
425 16.4/1.64 6.2/0.62 2.2/0.22
450 18.2/1.82 6.8/0.68 2.4/0.24
475 20.0/2.00 7.4/0.74 2.6/0.26
500 22.0/2.20 8.2/0.82 2.8/028
525 8.8/0.88 3.0/0.30
550 9.6/0.96 3.4/0.34
575 10.4/1.04 3.6/0.36
600 11.6/1.16 3.8/0.38
625 4.2/0.42
650 4.4/0.44
675 4.8/0.48
700 5.0/0.50 1.8/0.18
725 5.4/0.54 1.9/0.19
750 5.8/0.58 2.0/0.20
775 6.0/0.60 2.2/0.22
800 6.4/0.64 2.3/0.23
825 6.8/0.68 2.4/0.24
Information regarding design and operation
(cont.)
130
VIESMANN
VITOSOL
13
5822 440 GB
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