Engineering Data | Tempest ® III High Velocity
NORTH AMERICAN 6435 DUAL-FUEL BURNER ENGINEERING DATA, COLD AIR
6435-4 with Cold Main Air, Cold Atomizing Air
Main Air Pressure osi/"w.c./mbar
Not Burning Main Air Flow scfh (Nm 3 /h)
7240 (194) 460 (12.3) 240 (6.42)
Atom. air, scfh (Nm 3 /h) @ 30 osi/51.9"w.c./129 mbar Atom. air, scfh (Nm 3 /h) @ 8 osi/13.8"w.c./34.5 mbar
Burning Natural Gas
osi
0.2 0.3 0.9 545
1
4
9
16
30
"w.c. mbar
1.7
6.9 17.2
15.6
27.7
51.9 129
4.3
39
69
Main Air Flow, stoich. ratio
scfh
1270
2830 (75.6)
4350
6050 (162)
6900 (184)
(Nm 3 /h)
(14.6)
(33.9)
(116) 190
Atom. Air Flow @ 8 osi/35.5 mbar stoich. ratio
scfh
230
230
215
160
140
(Nm 3 /h)
(6.15)
(6.15) 1630 (43.6)
(5.75) 3170 (84.7)
(5.08) 4670 (124.8)
(4.28) 6350 (169.7)
(3.74) 7150 (191.1)
† Total Air Flow, stoich, ratio
scfh
905
(Nm 3 /h)
(24.2)
Gas Flow stoich. ratio
scfh
90
163
317
467
635
715
(Nm 3 /h)
(2.41)
(4.36)
(8.47)
(12.5)
(17.0)
(19.1)
Gas pressure stoich. ratio Tile pressure stoich. ratio
"w.c. (mbar) "w.c. (mbar)
0.17 (0.4) 0.17 (0.4)
1.2 (3.0) 0.6 (1.5)
4.2 (10.3) 9.0 (22.4) 15.1 (37.5)
18.5 (46.1) 9.5 (23.7)
2.2 (5.6)
4.8 (12.1) 7.8 (19.4)
‡ Max. % XSAir Stablility & UV Flame supervision
75 75
300 300 30+
350 350 30+
400 400 30+
350 350 30+
350 350
Max. % XSAir Ignition--pilot
Max. % XSFuel
30+
0
Flame length stoich. ratio Flame diameter stoich. ratio
inch (mm) inch (mm)
11 (279) 3.0 (76)
18 (457) 4.0 (76)
20 (508) 21 (508)
22 (508)
22 (559) 5.0 (157)
5.0 (76)
4.0 (102) 4.0 (102)
Burning #2 Oil
Main Air Flow, stoich. ratio
scfh
665
1240 (33.1) 440 (11.8) 1810 (48.4)
2750 (73.5)
4310
5850 (156)
6590
(Nm 3 /h)
(17.8)
(115)
(176) 370
§ Atom. Air Flow @ 30 osi/129 mbar stoich. ratio
scfh
455
425
415
390
(Nm 3 /h)
(12.2) 1250 (33.4)
(11.4) 3305 (88.3)
(11.1)
(10.4) 6370 (170)
(9.89) 7090
† Total Air Flow, stoich, ratio
scfh
4855 (130)
(Nm 3 /h)
(190)
Oil Flow stoich. ratio
gph (lph)
1
1.3
2.4
3.5
4.6
5.1
(3.79)
(4.9)
(9.1)
(13.2)
(17.4)
(19.3)
Oil pressure stoich. ratio Tile pressure stoich. ratio
psi (mbar) "w.c. (mbar)
0.9 (62) 0.1 (0.2)
1 (69)
1.2 (83)
1.5 (103)
1.8 (124)
2.1 (145)
0.7 (1.7)
2.6 (6.5) 5.5 (13.8) 9.7 (24.1)
11.8 (29.3)
‡ Max. % XSAir Stability & UV Flame supervision
75 75
300 300
350 350 200 30+
400 400 400 30+
350 350 250 30+
350 350 250
Max. % XSAir. Ignition--pilot Max.% XSAir Igniton--direct spark
stoic.
50
Max. % XSFuel
30+
30+
0
Flame Length stoich. ratio Flame diameter stoich. ratio
inch (mm) inch (mm)
11 (279) 3.0 (76)
18 (457) 3.0 (76)
20 (508) 20 (508) 20 (508)
22 (559) 5.0 (127)
3.0 (76)
4.0 (76)
4.0 (76)
† 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. § 30 osi is recommended atomizing air pressure for oil, but all burners will operate on oil with 22 osi atomizing air (at the burner) and 10% or more excess air. ■ Electrode setup used was that shown in drawing B4-7249. Cooling air was shut off for ignition and turned back on afterwards. • Direct spark ignition on oil is not considered a viable lighting method due to the lack of repeatability.
Velocity: The distance (in inches) from the tile outlet to the point where the tile velocity pressure is 0.1"w.c. (1259 fpm) is 75" on gas and 85" on oil (firing stoichiometric with 16 osi main air pressure).
Bulletin 6435 Page 12
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