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CLCH-SVX03C-EN
79
Startup
Fan Inlet Airflow Measuring System
Figure 72. Piezometer ring airflow
measurement
Table 19. M-Series fan inlet dimensions
Unit Size
Inside Diameter (in.)
Unit Size
Inside Diameter (in.)
03A
7.810
30A
21.259
03B
7.810
30B
18.250
D03
6.100
D30
17.080
E03
6.100
E30
17.080
03P
8.75
F30
15.160
06A
10.250
G30
15.160
06B
9.066
30P
22.90
D06
8.540
35A
24.000
E06
8.540
35B
21.259
06P
9.64
D35
17.080
08A
11.500
E35
17.080
08B
10.250
F35
15.160
D08
8.540
G35
15.160
E08
8.540
35P
22.90
08P
10.86
40A
26.037
10A
12.875
40B
24.000
10B
11.500
D40
19.290
D10
10.820
E40
19.290
A fan inlet airflow measuring system
with a piezometer ring is available on
many centrifugal and plenum fans.
Each system comes with a differential
pressure transmitter. The piezometer
ring is connected to the LO port of the
transmitter and the reference
pressure point is connected to (or
actually is) the HI port of the
transmitter.
E10
10.820
F40
17.080
F10
8.540
G40
17.080
G10
8.540
40P
25.56
10P
11.93
50A
28.404
12A
12.124
50B
26.037
12B
12.875
D50
21.650
D12
12.000
E50
21.650
E12
12.000
F50
19.290
F12
10.820
G50
19.290
G12
10.820
50P
28.34
12P
13.06
57A
28.404
14A
15.625
57B
26.037
14B
14.124
D57
21.650
D14
12.000
E57
21.650
E14
12.000
F57
19.290
F14
10.820
G57
19.290
G14
10.820
57P
34.91
14P
14.43
66A
28.404
17A
17.125
B66
29.040
17B
15.625
D66
24.020
D17
13.460
E66
24.020
E17
13.460
F66
21.650
F17
12.000
G66
21.650
G17
12.000
66P
34.91
17P
16.06
A80
29.040
21A
18.250
B80
29.040
21B
17.125
80D
26.890
D21
15.160
80E
26.890
E21
15.160
80F
24.010
F21
13.460
80G
24.010
G21
13.460
80P
39.06
21P
18.37
A100
32.740
25A
21.569
B100
32.740
25B
18.250
100D
30.000
D25
15.160
100E
30.000
E25
15.160
100F
26.890
F25
13.460
100G
26.890
G25
13.460
100P
42.85
25P
20.63
A120
32.740
B120
32.740
120D
33.460
120E
33.460
120F
30.000
120G
30.000
120P
42.85