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Q Engine Exhaust Flow
m3/min.
cfm
28.3
1000
25.5
900
22.7
800
19.8
700
17.0
600
14.2
500
11.3
400
8.5
300
7.1
250
5.7
200
4.2
150
2.8
100
2.5
90
2.3
80
2.0
70
1.7
60
1.4
50
1.1
40
3
(cfm x 0.02832 = m
Figure 2-13 Backpressure using Pipe Size 4 in., 152 m or Less
22
Section 2 Open Units
kPa per m
/min.)
Δ P Backpressure
in. Hg per foot
10.33
1.0
5.15
0.5
1.04
0.1
0.52
0.05
0.09
0.01
0.05
0.005
0.01
0.001
0.005
0.0005
0.001
0.0001
0.0005
0.00005
0.0001
0.00001
(in. Hg x 3.387 = kPa)
d Pipe Diameter
mm
inches
25.4
1.0
31.8
1.25
38.1
1.5
44.5
1.75
50.8
2.0
63.5
2.5
76.2
3.0
88.9
3.5
101.6
4.0
114.3
4.5
127.0
5.0
(in. x 25.4 = mm)
TP-6329 8/07
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