Product Overview | 4514 Fire•All™
Tile/Installation . Burner tiles are cast refractory rated for 2800°F furnace temperature. They are replaceable in the field, except for the 4514-10 whose mounting must be returned to the factory for tile replacement (or purchase a spare mounting plate with a tile cast onto it). Burner tiles should be supported securely in the furnace wall by a layer of castable refractory (not insulation) at least 9" thick all around the tile, extending back to the furnace shell and securely anchored to it. (See Supplement DF-M1.) Jacketed Tile options are available for applications where the tile is not supported by furnace refractory. Jackets are available in three different metals and have maximum temperature ratings for each. They must be protected with sufficient insulation so as not to exceed rated temperature.The maximum temperature rating for jacket metals depends upon frequency of heat-up/ cool-down cycles. As an example, batch annealing furnaces that are heated and cooled every day should use the "intermittent exposure" ratings. Continuous annealing furnaces that remain at the same temperature for months at a time, can use the higher "continuous" rating.
4514 FIRE•ALL™ are nozzle-mix, sealed-in burners used for many years on high temperature furnaces such as those for forging steel, melting aluminum or brass, and reheating steel bars or ingots...and on low temperature ovens and air heaters. Their construction allows maximum efficiency through close control of air/gas ratio, furnace atmosphere, and furnace pressure--all contributing to better product quality. OPERATION C ontrol: Normally, air primary with a cross-connected, pressure- balance regulator. For maximum turndown, use a 7216 (biased) Regulator, or throttle gas only. To protect burner from heat damage, do not set air pressure be- low 1 osi in a 1900°F furnace, or below 2 osi at 2200°F (whether gas is on or off). Flame Supervision . Flame safeguards are recommended for all installations. An ultraviolet cell will monitor pilot or main flame. For maximum safety, North American urges interrupted pilots when flame safeguards are used--pilots should be on only for a preset ignition period (usually 15 seconds), after which flame supervision detects main fire only. Adapters for mounting flame detection devices on 4514 Burners are tabulated on Bulletin 8832. Lighting: See 4514 Dimension Sheet for recommended premix pilot tips. Gas pressure requirement: About 1 osi at the burner for natural gas on stoichiometric ratio; about 1⁄5 of the air pressure for coke oven gas.
Continuous Intermittent
Designation Jacket Metal max.temp.
exposure
4514- -LC 4514- -L4 4514- -L9
carbon steel 304 stainless 309 stainless
700°F
700°F
1600°F 1900°F
1500°F 1800°F
COMBUSTION AIR CAPACITIES scfh (for Btu/h HHV, multiply by 100)
approximate flame length stoichiometric ratio
available excess air ratio setting
air pressure drop across the burner in osi
Burner
designation
0.1
1
5
6
8
12
16
24
16 osi
4514-6 4514-7
1 180 1 930 3 350 5 550
3 710 6 100
8 300
9 100
10 500 17 200 30 000 49 600 104 000 154 000
12 900 21 000 36 700 60 500 127 000 189 000
14 900 24 400 42 400 70 000 146 000 218 000
18 200 29 900 51 900 85 700 179 000 267 000
4 1 /
2 '
300%
13 600 23 700 39 200 82 000
15 000 26 000 43 000 89 500 135 000
5'
650% 450% 250% 700% 350%
4514-8-A 4514-8-B 4514-9 4514-10
10 600 17 600 36 600
8
9'
11 600 17 300
16' 19'
54 500 122 000
Bulletin 4514 Page 2
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