6435-3 | 800 °F Main Air, Cold Atomizing Air
Main Air Pressure osi/"w.c./mbar
Burning Natural Gas
osi
0.2 0.3 0.9 200
1
4
9
16
26
"w.c. mbar
1.7
6.9 17.2
15.6
27.7
45.0
4.3 545
39
69
112
Main Air Flow, stoich. ratio
scfh
1200 (32.1)
1840 (49.2)
2470 (66.0)
3370 (90.0)
(Nm 3 /h)
(5.35)
(14.6)
Atom. Air Flow @ 8 osi/35.5 mbar stoich. ratio
scfh
120
110
110
100
90
40
(Nm 3 /h)
(3.21)
(2.94)
(2.94) 1440 (38.5)
(2.67) 2070 (55.3)
(2.41) 2690 (71.9)
(1.07) 3540 (95.0)
† Total Air Flow, stoich, ratio
scfh
450
785
(Nm 3 /h)
(12.0)
(21.0)
Gas Flow stoich. ratio
scfh
45
79
144
207
269
354
(Nm 3 /h)
(1.20)
(2.00)
(3.85)
(5.53)
(7.19)
(9.46)
Gas pressure stoich. ratio Tile pressure stoich. ratio
"w.c. (mbar)
0.17 (0.4)
0.9 (2.2) 0.6 (1.5)
2.8 (6.9) 5.5 (13.8) 9.9 (24.6) 17.43 (43.1)
"w.c. (mbar) 0.02 (0.04)
2.0 (4.9) 4.0 (9.9) 7.2 (17.9)
12.1 (30.2)
‡ Max. % XSAir Stablility UV Flame supervision
100 100
300 300
400 400
400 400
400 400
400 400
Max. % XSAir Ignition--pilot
Max. % XSFuel
30
30
30
30
30
30
Flame length stoich. ratio Flame diameter stoich. ratio
inch (mm) inch (mm)
4 (102) 2.0 (51)
6 (152) 2.0 (51)
8 (203) 2.0 (51)
11 (279) 2.0 (51)
305
13 (330) 2.5 (64)
2.0 (51)
Burning #2 Oil
Main Air Flow, stoich. ratio
scfh
210
540
1220
1860 (49.7)
2520 (67.4)
3390 (90.6)
(Nm 3 /h)
(5.61)
(14.4)
(32.6)
Atom. Air Flow @ 30 osi/129 mbar stoich. ratio
scfh
260
270
280
290
280
270
(Nm 3 /h)
(6.95)
(7.22)
(7.48) 1630 (43.6)
(7.75) 2280 (60.9)
(7.48) 2930 (78.3)
(7.22) 3790
† Total Air Flow, stoich, ratio
scfh
600
940
(Nm 3 /h)
(16.0) 0.43
(25.1) 0.68 (2.57)
(101)
Oil Flow stoich. ratio
gph (lph)
1.16
1.63
2.1
2.7
(1.63)
(4.39) 1.1 (76)
(6.17)
(7.95)
(10.2)
Oil pressure stoich. ratio Tile pressure stoich. ratio
psi (mbar) "w.c. (mbar)
0.6 (41)
0.8 (55) 0.5 (1.3)
1.4 (97)
1.6 (97)
1.9 (131)
-0.1 (-0.2)
2.3 (5.7) 4.2 (10.6) 7.0 (17.5)
11.6 (28.9)
‡ Max. % XSAir Stability UV Flame supervision
10 10 25
75 75 25
250 250
400 400
400 400
400 400
Max.% XSAir gnition--pilot
Max. % XSFuel
25
25
25
25
Flame Length stoich. ratio Flame diameter stoich. ratio
inch (mm) inch (mm)
5 (152) 2.0 (51)
7 (178) 2.5 (64)
9 (229) 230 (51)
10 (254) 3.0 (76)
12 (305) 3.0 (76)
12 (305) 3.0 (76)
The external metal temperatures recorded with neutral furnace pressure and in cold chamber with preheated air were as follows:
Metal temperature °F (°C)
Preheat Air
Body
Body
Backplate
temperature, °F (°C)
(near flange) (main air inlet flange )
400 (204) 600 (316) 800 (427)
260 (1127) 370 (188) 490 (254)
250 (121) 370 (188) 410 (210)
240 (116) 350 (177) 460 (238)
† 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.
Bulletin 6435 Page 17
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