Product Overview | 4796 Magna-Flame ™
4796 Magna-Flame ™ Gas Burners are designed to fire in combustion chambers that have a limited length and sufficient width to allow the flame envelope to develop. Operation is quiet and the flame is tile-stable. The 4796 Magna-Flame™ is stable at full capacity from rich air/fuel ratios up to 150% excess air. The burner can be used in cold, sealed-in combustion chambers. Available air connection sizes range from 12" through 24" which permits the use of a single burner, rather than multiple burners, to obtain the desired input in a chamber of limited length. LOW NOx OPERATION. The 4796 Magna-Flame™ burner produces about 10% lower NOx emissions than conventional gas burners. The same high swirl that creates a short bushy flame also pulls furnace gases into the flame's primary reaction zone to reduce NOx formation. This rapid mix design creates an exceptionally stable flame and makes the burner an excellent platform for flue gas recirculation (FGR). When operated with 15-20% FGR the combustion system will produce less than 30ppm NOx in most applications. CONTROL. Mass flow control systems are normally used with 4796 Burners, especially in the larger sizes. Cross-connected regulator systems can also be used because the required gas pressure is approximately 0.6 times the air pressure. CONSTRUCTION. The body is fabricated using heavy duty welded steel featuring a round mounting flange, a refractory ring and an alloy air spin vane in the front. Connections for pilot and flame detector can be factory-installed in any of several locations per customer specification.
The 4796 Magna-Flame burner is offered with the following options: — Fuel Tube Material • Carbon Steel (standard prior to April 2020) • 316sst — Main Air Spin Vane Angle • 45° (standard prior to April 2020), typically combined with a 30° tile (60° included angle) • 30° typically combined with a 20° tile (40° incluced angle) The reduced vane will decrease flame diameter and increase flame length. See flame dimensions in the table below. See burner dimensions on page 3. PILOT and FLAME SUPERVISION. Magna-Flame™ burners should be pilot ignited . The 4014 gas-boosted pilot (sold separately) listed in the dimension table is required, and provision must be made for low fire start with 1.0"w.c. or less main air. The pilot must be of the interrupted type to prevent overheating of the mounting. The UV detector location should be 90° clockwise of the pilot when viewing the rear of burner (in the direction of air swirl). Self-checking UV scanners (sold separately) are recommended for flame supervision. See Bulletin 8832 for selection of UV adapters. It is possible for a UV scanner mounted on this burner to sight flame(s) of other burners in the same firing chamber. Consult Fives North American Combustion, Inc. for configuration guidance on multiple burner applications.
Flame Dimensions @ 8 osi main air
Maximum % excess air
Combustion Air Capacities (scfh) Multiply by 100 to get Btu per hour Air pressure drop across the burner, osi
10% XSA
40% XSA
Air pressure in osi
45° vane angle
30° vane angle
45° vane angle
Burner Designation
30° vane angle
0.2
4.0
8.0
L
Dia. L
Dia.
L
Dia.
L
Dia.
1.0
5.0
6.0
8.0
150 000 193 000
164 000 190 000 211 000 244 000
500 200 500 200 500 200 500 200 500 200 500 200 500 200
150 150 150 150 150 150 150
6' 7'
5' 6' 6' 6' 7' 8' 8'
8'
4' 5' 5' 5'
4½'
4' 5' 5' 5'
6'
3½'
4796-12 4796-14 4796-16 4796-18 4796-20 4796-22 4796-24
67 000 86 000
9½'
5'
6½'
4' 4' 4'
120 000 269 000 295 000 340 000 155 000 346 000 380 000 438 000 200 000 447 000 490 000 565 000 237 000 530 000 580 000 670 000 282 000 630 000 690 000 795 000
7½'
10'
5½'
7'
8'
10½'
6'
7½'
9'
12' 13'
6'
6½'
5½' 6½' 6½'
8½'
4½'
9½'
6½' 6½'
7' 7'
9'
5' 5'
10'
13½'
9½'
Because of a positive pressure in the burner, it is difficult to light with a torch unless the air is turned very low and a strong pressure torch is used. Maximum recommended pressure.
Bulletin 4796 Page 2
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