6435-2 | 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 17.2 950
15.6
27.7
45.0
4.3 510
39
69
112
Main Air Flow, stoich. ratio
scfh
1380 (36.9)
1860 (49.7)
2360 (63.1)
(Nm 3 /h)
(5.35)
(13.6)
(25.4)
Atom. Air Flow @ 8 osi/35.5 mbar stoich. ratio
scfh
60
60
60
50
40
20
(Nm 3 /h)
(1.60)
(1.60)
(1.60)
(1.34) 1560 (41.7)
(1.07) 2030 (54.3)
(0.53) 2510 (67.1)
† Total Air Flow, stoich, ratio
scfh
390
700
1140
(Nm 3 /h)
(10.4)
(18.7)
(30.5)
Gas Flow stoich. ratio
scfh
39
70
114
156
203
251
(Nm 3 /h)
(1.04)
(1.87)
(3.05)
(4.17)
(5.43)
(6.71)
Gas pressure stoich. ratio Tile pressure stoich. ratio
"w.c. (mbar) "w.c. (mbar)
0.35 (0.9) 0.17 (xx)
1.0 (2.6) 0.9 (2.2)
2.8 (6.9) 5.2 (12.9) 8.7 (21.5)
13.3 (33.2) 11.2 (28.0)
2.2 (5.6) 4.3 (10.8)
7.1 (17.7)
‡ Max. % XSAir Stablility UV Flame supervision
400 400
400 400
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)
6 (152) 1.5 (38)
8 (203) 2.0 (51)
10 (254) 2.0 (51)
11 (279) 2.5 (64)
12 (305) 2.5 (64)
14 (356) 2.5 (64)
Burning #2 Oil
Main Air Flow, stoich. ratio
scfh
220
430 (11.5)
900
1390 (37.2)
1850 (49.5)
2320 (62.0)
(Nm 3 /h)
(5.88)
(24.1)
Atom. Air Flow @ 30 osi/129 mbar stoich. ratio
scfh
170
180
200
210
220
220
(Nm 3 /h)
(4.54)
(4.81)
(5.35) 1230 (32.9)
(5.61) 1730 (46.2)
(5.88) 2200 (58.8)
(5.88) 2670 (71.4)
† Total Air Flow, stoich, ratio
scfh
520
740
(Nm 3 /h)
(13.9) 0.38
(19.8) 0.53 (2.01)
Oil Flow stoich. ratio
gph (lph)
0.88
1.24
1.57
1.90
(1.44)
(3.33)
(4.69)
(5.94)
(7.19)
Oil pressure stoich. ratio Tile pressure stoich. ratio
psi (mbar) "w.c. (mbar)
—
—
0.1 (6.9) 0.5 (34.5) 0.7 (48.3)
1.0 (69) 1.7 (4.3)
0 (0)
0 (0)
0.17 (0.4) 0.9 (2.2)
1.2 (3.0)
‡ Max. % XSAir Stability UV Flame supervision
50 50 25
50 50 25
175 175
250 250
400 400
400 400
Max.% XSAir gnition--pilot
Max. % XSFuel
25
25
20
5
Flame Length stoich. ratio Flame diameter stoich. ratio
inch (mm) inch (mm)
4 (102) 2.0 (51)
8 (203) 2.0 (51)
10 (254) 2.0 (51)
11 (279) 2.5 (64)
12 (305) 2.5 (64)
12 (305) 2.5 (64)
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)
240 (116) 290 (143) 305 (152)
260 (127) 330 (166) 470 (243)
240 (116) 350 (177) 450 (232)
† 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 16
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