Grundfos SQE 2-55 96510151 [15/388] English gb
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Grundfos SQE 2-55 96510151 [15/388] English gb

Grundfos SQ 1-140 96510195 [15/388] English gb
English (GB)
15
Using p
min
and Q
max
, the minimum diaphragm tank size, precharge pressure and pressure switch settings
can be found in the guideline table below:
Example
p
min
= 35 m head, Q
max
= 2.5 m
3
/h.
On the basis of this information, the following values can be found in the table:
Minimum diaphragm tank size = 33 litres.
p
pre
= 31.5 m head.
p
cut-in
= 36 m head.
p
cut-out
= 50 m head.
1 m head = 0.098 bar.
p
min
[m]
Q
max
[m
3
/h]
p
pre
[m]
p
cut-in
[m]
p
cut-out
[m]
0.6 0.8 1 1.2 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8
Diaphragm tank size [litres]
25 8 8 18 18 18 18 24 33 33 50 50 50 50 80 80 80 80 80 22.5 26 40
30 8 8 18 18 18 24 33 33 50 50 50 50 80 80 80 80 80 27 31 45
35 8 181818182433335050508080808080 31.5 36 50
40 8 1818181824335050508080808080 36 41 55
45 8 18181824333350505080808080 40.5 46 60
50 8 181818243350505080808080 45 51 65
55 18 18 18 18 24 33 50 50 50 80 80 80 49.5 56 70
60 18 18 18 18 24 33 50 50 80 80 80 80 54 61 75
65 18 18 18 24 24 33 50 50 80 80 80 80 58.5 66 80

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