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2
CORRECTED BURNER AIR PRESSURE ACCORDING TO ALTITUDE
m a.s.l.
Rated Pressure
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
5.00
5.50
6.00
6.50
7.00
7.50
8.00
8.50
9.00
9.50
10.00
Average barometric
pressure (20°C)
Average barometric
pressure (68°F)
3.7
Minimum furnace dimensions
The firing rate was obtained in special test boilers.
Fig. 4 indicates the diameter and length of the test combustion
chamber.
29.6
23.0
16.5
13.2
9.9
6.6
3.3
1.6
MBtu/hr760
D9084
20049577
Technical description of the burner
0
100
ft a.s.l
0
328
0.49
0.50
0.99
1.00
1.48
1.50
1.97
2.00
2.47
2.50
2.96
3.00
3.46
3.50
3.95
4.00
4.44
4.50
4.94
5.00
5.43
5.50
5.92
6.00
6.42
6.50
6.91
7.00
7.40
7.50
7.90
8.00
8.39
8.50
8.88
9.00
9.38
9.50
9.87
10.00
mbar
1013
1000
"w.c.
399
394
1 5 . 7
1 9 . 7
2 3 . 6
1.5
1000
Altitude
305
610
915
1000
2000
3000
0.51
0.53
0.55
1.02
1.06
1.10
1.53
1.59
1.65
2.05
2.12
2.20
2.56
2.65
2.75
3.07
3.18
3.30
3.58
3.71
3.85
4.09
4.24
4.40
4.60
4.77
4.95
5.12
5.30
5.51
5.63
5.83
6.06
6.14
6.36
6.61
6.65
6.89
7.16
7.16
7.42
7.71
7.67
7.96
8.26
8.18
8.49
8.81
8.70
9.02
9.36
9.21
9.55
9.91
9.72
10.08
10.46
10.23
10.61
11.01
977.4
942.8
908.2
385
371
358
Example:
Output 26510 Mbtu/hr: - diameter 47.7 inch - length 20 ft.
3 1 . 5
3 9 . 4
4 7 . 2
7.5 11.3 18.9
22.7
10
GB
1220
1525
1830
4000
5000
6000
0.57
0.59
0.62
1.14
1.19
1.23
1.71
1.78
1.85
2.28
2.37
2.46
2.85
2.96
3.08
3.43
3.56
3.70
4.00
4.15
4.31
4.57
4.74
4.93
5.14
5.33
5.54
5.71
5.93
6.16
6.28
6.52
6.77
6.85
7.11
7.39
7.42
7.71
8.01
7.99
8.30
8.62
8.56
8.89
9.24
9.13
9.48
9.85
9.71
10.08
10.47
10.28
10.67
11.09
10.85
11.26
11.70
11.42
11.86
12.32
875.8
843.5
811.85
345
332
320
i nc hes
f t
ft= 0,12 MBtu
hr
37870
2135
2440
7000
8000
0.64
0.67
1.28
1.34
1.92
2.01
2.56
2.67
3.21
3.34
3.85
4.01
4.49
4.68
5.13
5.35
5.77
6.02
6.41
6.69
7.05
7.35
7.69
8.02
8.34
8.69
8.98
9.36
9.62
10.03
10.26
10.70
10.90
11.37
11.54
12.04
12.18
12.70
12.82
13.37
779.8
747.8
307
294
Fig. 4
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