6435-6 | 800 °F Main Air, Cold Atomizing Air
Main Air Pressure osi/"w.c./mbar
Burning Natural Gas
osi
0.2 0.3 0.9
1
4
9
16
20
"w.c. mbar
1.7
6.9 17.2
15.6
27.7
34.6
4.3
39
69
86
Main Air Flow, stoich. ratio
scfh
1200 (32.1)
2600 (69.5)
5200 (139)
7900
10 700
12 400
(Nm 3 /h)
(211) 400
(286)
(331) 380 (10.2)
Atom. Air Flow @ 8 osi/35.5 mbar stoich. ratio
scfh
410
410
400
400
(Nm 3 /h)
(11.0) 1750
(11.0) 3150 (84.2)
(10.7) 5750 (154)
(10.7) 8450 (226)
(10.7)
† Total Air Flow, stoich, ratio
scfh
11 200
12 900
(Nm 3 /h)
(46.8)
(299)
(345) 1300
Gas Flow stoich. ratio
scfh
175
315
575
845
1120
(Nm 3 /h)
(4.68)
(8.42)
(15.4)
(22.6)
(29.9)
(334.7) 16.4 (41) 12.5 (31)
Gas pressure stoich. ratio Tile pressure stoich. ratio
"w.c. (mbar) "w.c. (mbar)
0.17 (0.4)
1.0 (2.6) 0.5 (1.3)
3.8 (9.5) 8.0 (19.8) 13.5 (34)
0
1.7 (4.3)
3.5 (8.6) 6.4 (15.9)
‡ Max. % XSAir UV Flame supervision
25
200 300 250
400 750 500
500 750 500
550 750 400
650 650 250
Max % XSAir Stability
125 100
Max. % XSAir Ignition--pilot
Max. % XSFuel
30
30
30
30
30
30
Flame length stoich. ratio Flame diameter stoich. ratio
inch (mm) inch (mm)
15 (381) 4.0 (102)
21 (533) 4.0 (102)
24 (610)
24 (610)
24 (610)
24 (610) 7.0 (178)
5.0 (127) 6.0 (152) 6.0 (1520
Burning #2 Oil
Main Air Flow, stoich. ratio
scfh
1400 (37.4)
2650 (70.8)
5350 (143)
8100 (217)
10 800
12 400
(Nm 3 /h)
(289)
(331) 460 (12.3)
Atom. Air Flow @ 30 osi/129 mbar stoich. ratio
scfh
510
510
500
500
510
(Nm 3 /h)
(13.6) 2050 (54.8)
(13.6) 3300 (88.2)
(13.4) 6000 (160)
(13.4) 8750 (234)
(13.6)
† Total Air Flow, stoich, ratio
scfh
11 500
13 000
(Nm 3 /h)
(307)
(347)
Oil Flow stoich. ratio
gph (lph)
1.5
2.4
4.3
6.3
8.2
9.3
(5.7)
(9.1)
(16.3)
(23.8)
(31.0)
(35.2)
Oil pressure stoich. ratio Tile pressure stoich. ratio
psi (mbar) "w.c. (mbar)
1.4 (97)
1.5 (103)
1.7 (117) 1.6 (3.9)
1.8 (124) 3.3 (8.2)
2.0 (138) 5.9 (14.7)
2.1 (145) 7.6 (9.0)
0.07 (0.2) 0.26 (0.6)
‡ Max. % XSAir UV Flame supervision
25 50 25 30
125
250 400 250
400 600 400
675 700 675
500 800 500
Max. % XS Air Stability Max.% XSAir gnition--pilot
200
125 30
Max. % XSFuel
30
20
20
20
Flame Length stoich. ratio Flame diameter stoich. ratio
inch (mm) inch (mm)
12 (xx)
24 (610) 7.0 (178)
24 (610)
24 (610)
24 (610)
24 (610) 9.0 (229)
6.0 (152)
8.0 (203) 8.0 (203) 8.0 (203)
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
temperature, °F (°C)
(near flange) (main air inlet flange )
400 (204) 600 (316) 800 (427)
410 (210) 560 (293) 720 (832)
310 (154) 440 (227) 570 (299)
† 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 20
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