Sheet 6435-3 Page 2
6435-2 – 800°F Main Air, Cold Atomizing Air
Main Air Pressure, osi
Burning Natural Gas
0.2
1
4
9
16
26
Main air, scfh, stoich.
200
510
950 1380
1860 2360
Atom. air, scfh at 8 osi, stoich. †Total air, scfh, stoich. Gas flow, stoich., scfh Gas pressure, stoich., osi Flame length, in., stoich. Flame diameter, in., stoich. Tile pressure, osi, stoich. Max. %XSAir ‡Stability and flame supervision
60
60
60
50
40
20
390
700
1140 1560 114 156
2030
2510
39 0.2
70
203
251 7.7
0.6
1.6
3.0
5.0
6
8 2
10
11
12
14
1.5 0.1
2
2.5 2.5
2.5 4.1
2.5 6.5
0.5
1.3
400 400 400 400
400 400 400 400
400 400
400 400
‡Ignition--pilot
Max. %XSFuel
30
30
30
30
30
30
Burning #2 Oil
0.2
1
4
9
16
26
Main air, scfh, stoich.
220 170 520 0.38
430 180 740 0.53
900 1390 1850 2320
Atom. air, scfh at 30 osi, stoich.
200
210 220
220
†Total air, scfh, stoich. Oil flow, stoich., gph
1230 1730 2200
2670
0.88
1.24 1.57
1.9 1.0
Oil pressure, stoich., psi Flame length, in., stoich. Flame diameter, in., stoich. Tile pressure, osi, stoich.
—
—
0.1
0.5
0.7
4 2
8 2
10
11
12
12
2
2.5 2.6
2.5 4.4
2.5 7.2
0.1
0.5
1.4
Max. %XSAir ‡Stability and flame supervision
50 50
50 50
175 175
250 400 250 400
400 400
‡Ignition--pilot
Max. %XSFuel
25
25
25
25
20
5
The external metal temperatures recorded with neutral furnace pressure and in a cold chamber with preheated air were as follows:
Metal temperatue, F
Body
Preheat Air (Main Air temperature, F (near flange) Inlet Flange) Body
Backplate
400 600 800
240 290 305
260 330 470
240 350 450
† Total air is main air plus atomizing air plus 130 scfh for pilot air. ‡ Honeywell Ultravision Flame Detector C7027A and Honeywell Flame Supervision Protectorelay RA890G yielded 1.5 micro amps or greater for all above rates.
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