Full Range Flows by Pipe Size
GAGE
RANGE
(in W.C.) |
MEDIA @ 70* F |
FULL FLOWS BY PIPE SIZE (APPROXIMATE) |
1" |
1-1/4" |
1-1/2" |
2" |
2-1/2 |
3" |
4" |
5" |
8" |
10" |
2 |
WATER (GPM)
AIR @ 14.7 PSIA (SCFM)
AIR @ 100 PSIG (SCFM) |
4.8
19.0
50.0 |
8.3
33.0
90.5 |
11.5
42.0
120.0 |
20.5
65.O
210.0 |
30
113
325 |
49
183
510 |
86
330
920 |
205
760
2050 |
350
1340
3600 |
560
2130
6000 |
5 |
WATER (GPM)
AIR @ 14.7 PSIA (SCFM)
AIR @ 100 PSIG (SCFM) |
7.7
30.0
83.0 |
14.0
51.0
142.0 |
18.0
66.0
190.0 |
34.0
118.0
340.0 |
47
178
610 |
78
289
820 |
138
510
1600 |
320
1200
3300 |
560
2150
5700 |
890
3400
10000 |
10 |
WATER (GPM)
AIR @ 14.7 PSIA (SCFM)
AIR @ 100 PSIG (SCFM) |
11.0
41.0
120.0 |
19.0
72.0
205.0 |
25.5
93.0
275.0 |
45.5
163.0
470.0 |
67
250
740 |
110
410
1100 |
195
725
2000 |
450
1690
4600 |
800
3040
8100 |
1260
4860
15000 |
25 |
WATER (GPM)
AIR @ 14.7 PSIA (SCFM)
AIR @ 100 PSIG (SCFM) |
18.0
63.0
185.0 |
32.0
112.0
325.0 |
40.5
155.0
430.0 |
72.0
255.0
760.0 |
108
390
1200 |
173
640
1800 |
310
1130
3300 |
720
2630
7200 |
1250
4860
13000 |
2000
7700
22000 |
50 |
WATER (GPM)
AIR @ 14.7 PSIA (SCFM)
AIR @ 100 PSIG (SCFM) |
25.0
90.0
260.0 |
44.0
161.0
460.0 |
57.5
205.0
620.0 |
100.0
360.0
1050.0 |
152
560
1700 |
247
900
2600 |
435
1600
4600 |
1000
3700
10000 |
1800
6400
18500 |
|
100 |
WATER (GPM)
AIR @ 14.7 PSIA (SCFM)
AIR @ 100 PSIG (SCFM) |
36.5
135.0
370.0 |
62.O
230.0
660.0 |
82.0
300.0
870.0 |
142.0
505.0
1500.0 |
220
800
2300 |
350
1290
3600 |
620
2290
6500 |
1500
5000
15000 |
|
|
| Pressure Correction Factors |
Regulator
Inlet Pressure |
Pressure
Factor |
| 1 psig |
1.05 |
| 2 psig |
1.11 |
| 3 psig |
1.18 |
| 4 psig |
1.25 |
| 5 psig |
1.32 |
| 6 psig |
1.39 |
| 7 psig |
1.45 |
| 8 psig |
1.52 |
| 9 psig |
1.59 |
| 10 psig |
1.66 |
| 11 psig |
1.72 |
| 12 psig |
1.81 |
| 13 psig |
1.86 |
| 14 psig |
1.93 |
| 15 psig |
2.0 |
To set desired input change BTU input on boiler to cu. ft. by subtracting the last 3 zeros. If gas supply pressure is over 1 psig take the corresponding pressure factor from the above chart and divide it into the input. This is the actual input required at the supply pressure.
EXAMPLE:
The boiler input is equal to 2,500,000 BTU minus 3 zeros = 2,500 cu. ft. input. The gas supply pressure is 2 psig = 1. 11 correction factor. 2,500 ? 1.11 = 2,250. 2,250 = 16 seconds on 10 cu. ft. dial.
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