Sheet 6435-3 Page 4
6435-4 – 800°F Main Air, Cold Atomizing Air
ain A ir Pressure, osi Main Air Pressure, osi
Burning Natural Gas
0.2
1
4
9
16
20
Main air, scfh, stoich.
430 215 775
1050 2150 3200 4250 4780
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
215
200
180
160
150
1400 2480
3510 4540 5060
78
140 0.6
248
351
454 6.9
506
0.15
1.9
4.1
8.5
8 2
13
16
18
18
18
3
3
4
4
4
0.05
0.3 0.85
1.9
3.2
3.9
400 350 NO 30+
400 400
400 400 150 30+
350 350 150 30+
400 400 300 30+
400 400 300 30+
‡Ignition--pilot
• Ignition--direct spark
10
Max. %XSFuel
30+
Burning #2 Oil
0.2
1
4
9
16
2 0
Main air, scfh, stoich.
500 430
1020 420 1570
2050 3150 4230
4770
Atom. air, scfh at 30 osi, stoich.
410 400
395
390
†Total air, scfh, stoich Oil flow, stoich., gph
1060
2590 3680 4755
5290
0.8 0.9
1.1
1.9 1.2
2.6
3.4
3.8
Oil pressure, stoich., psi Flame length, in., stoich. Flame diameter, in., stoich. Tile pressure, osi, stoich.
1.0
1.3
1.5
1.6
10
11
14
17
17
18
2 0
2
3
3
3
3
0.25
1.0
1.9
3.2
4.1
Max. %XSAir ‡Stability and flame supervision
25 25
50 50
125 250 125 250
300 250 20+
300 150 20+
‡Ignition--pilot
Max. %XSFuel
20+
20+
20+
20+
† 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. • The electrode setup used was that shown in drawing B4-7249. The cooling air was shut off for ignition and turned back on afterwards.
Maximum body temperature 510°F.
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