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5.2.1 Calculation of
temperature-compensated airflows
273 + t
∆p
= ∆p x
a
c
293
Δp
= corrected flow measurement pressure in Pa
c
Δp = measured flow measurement pressure in Pa
t
= the air temperature at the fan inlet in °C
a
√
∆p
√
q =
c
+ c
-
2
c
1
q = the calculated airflow, [m³/s]
c
, c
= constants that depend on fan size, see table below.
1
2
Min. air
Size
flow, m³/s
04
0,08
05
0,08
07
0,08
08
0,20
11
0,20
12
0,20
14
0,20
20
0.30
25
0.30
30
0,50
35
0,50
40-1
0,75
40-2
0,75
50
0,60
60
1,00
70
1,00
80
1,50
100
1.5
120
2.5
30
www.swegon.com
c
2
SILVER C RX/PX/CX
Max. pres-
Max. air-
sure read-
flow, m³/s
ing, Pa
0,45
301
0,65
619
0,75
821
1,0
719
1.1
867
1,4
630
1,65
871
2.1
712
2.5
998
3,2
816
3,9
1207
3,9
561
5.0
901
5.0
998
6,5
814
7,5
1083
9,5
790
11
1053
14
779
5.2.2 Calculation of flow
measurement pressure
∆p = (c
x q + c
) x q
1
3
Δp = calculated flow measurement pressure in Pa
q = airflow at fan inlet in m³/s
c
, c
= constants that depend on fan size, see table below.
1
3
SILVER C SD
Max. pres-
Max. air-
sure read-
flow, m³/s
ing, Pa
0,6
529
0.8
933
0.8
933
1.2
1028
1.2
1028
1,8
1034
1,8
1034
2,8
1245
2,8
1245
4
1269
4
1269
5
901
6
1279
5.6
1245
8
1232
8
1232
12
1250
12
1250
18
1279
GB.SILVERSK.170901
c1
c2
1421,9
0,0001
1421,9
0,0001
1421,9
0,0001
690
0,00043
690
0,00043
311,75
0,00045
311,75
0,00045
151
0,00525
151
0,00525
77,688
0,00174
77,688
0,00174
32,942
0,05509
32,942
0,05509
37,75
0,02102
19,11
0,00078
19,11
0,00078
8,378
0,04642
8,378
0,04642
3,848
0,05349
We reserve the right to alter specifications.
c3
28,4
28,4
28,4
28,74
28,74
13,21
13,21
21,89
21,89
6,48
6,48
15,464
15,464
10,945
1,07
1,07
3,61
3,61
1,78
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