North American 6435 Dual-Fuel Burner Engineering Data, 800°F Hot Air
Sheet 6435-3
6435-1 – 800°F Main Air, Cold Atomzing Air
Main Air Pressure, osi
Burning Natural Gas Main air, scfh, stoich.
0.2 110 50
1
4
9
16
30
190
410 630
840
1130
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
50
45
45
40
35
295
375
590 810
1015 1300
29
37
59 1.2
81
101 3.5
130 6.0
0.21 0.55
2.2
3 2
4 2
6 2
8 2
10
10
2
2
0.15 0.37
0.68
1.3
2.1
3.6
100 100
150 150
250 350 250 350
350 350
400 400
‡Ignition--pilot
Max. %XSFuel
30
30
30
30
30
30
Burning #2 Oil
0.2
1
4
9
16
30
Main air, scfh, stoich.
75
190
410 620
840
1140
Atom. air, scfh at 30 osi, stoich.
110
110
115
115
115
115
†Total air, scfh, stoich. Oil flow, stoich., gph
320 0.23
435 0.31
650 870 0.46 0.61
1090 0.77
1385 0.98 0.51
Oil pressure, stoich., psi Flame length, in., stoich. Flame diameter, in., stoich. Tile pressure, osi, stoich.
0.1
0.1
0.1
0.1
0.2
1 1
3
5 2
6 2
9 2
10
1
2
0 0.25
0.86
1.4
2.3
3.8
Max. %XSAir ‡Stability and flame supervision
10 10 25
10 10 25
10 10 25
25 25 25
75 75 25
100 100
‡Ignition--pilot
Max. %XSFuel
25
Because of the small size of the burner, the capacities when run with elevated air temperatures become very small and fuel rates (especially oil) become extremely difficult to set. The burner operating limits become much narrower with hot air.
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
Body
(Main Air
temperature, F (near flange)
Inlet Flange)
Backplate
400 600 800
325 380 420
310 380 430
270 350 410
† Total air is main air plus atomizing air plus 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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