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