High Capacity or Air Temperature | 6821 Magna-Flame™ Burner
Bulletin 6575 Page 8
exit velocities, resulting in increased convective heat transfer and at the same time entrainment of surrounding furnace gases resulting in low NOx emissions. For extremely low NOx applications, consult Fives North American Combustion, Inc. about combining the R-version burner with low NOx injection (LNI) technology. CONSTRUCTION 6821 Bodies featuring round mounting flanges are fabricated heavy-gauge carbon steel and lined with ceramic fiber and castable refractory. Internal parts are heat-resistant alloy and the stabilizing disc is faced with high alumina refractory.
For applications that require higher capacities or higher preheated air temperatures than a standard HiRAM®, consider using a 6821-R burner. HOT AIR 6821 Hot Air Magna-Flame Burners operate with hot air from recuperators or other heat recovery devices to save energy on furnaces, such as steel reheat, aluminum melting, process heaters, and other high temperature applications. Normal capacities are rated at 1000 °F (538 °C) air at a pressure of 10"w.c. (25 mbar). HIGH VELOCITY For applications that benefit from high velocity, such as aluminum melters and holders, steel reheat furnaces or others, the 6821 is available in an “R-version”. The refractory tile shape of the R version is reduced (converging) to produce high hot-gas
For capacities less than the HiRAM consider a 4441, 4445 or 6435 Tempest burner.
COMBUSTION AIR CAPACITY, scfh (Nm 3 /h) (for Btu/h HHV capacity (stoic.), multiply scfh by 100)
Burner Designation
Air @ 10"w.c./25 mbar DR
scfh (Nm 3 /h) 48"w.c./120 mbar not burning L ft. (M)
60 °F (16°C) Air m scfh (Nm3/h)
OIl Capacity m gph (L/H)
Standard Tile
Reduced Port Tile
1000 ° (538 °C) Air scfh (Nm3/h)
Ø ft. (M)
6821-10-A54 6821-10-A-54R 67 000 (1791) 6821-10-B54 6821-10-B-54R 89 000(2379)
40 000 (1069) 53 000 (1417) 78 000 (2085) 106 000 (2833) 134 000 (3582) 172 000 (4598) 215 000 (5747) 260 000 (6950)
35 (132) 35 9132) 60 (227) 100 (379) 100 (379) 200 (757) 200 (757) 200 (757)
6000 (160) 6000 (160) 10 700 (286) 19 700 (527) 19 700 (527) 29 000 (775) 29 000 (775) 29 000 (775)
5.0 (1.5) 7.0 (2.1) 9.0 (2.7) 10 (3.0) 13 (4.0) 16 (4.9) 17 (5.2) 20 (6.1)
2.0 (0.6) 2.0 (0.6) 3.0 (0.9) 4.0 (1.2) 4.0 (1.2) 5.0 (1.5) 5.0 (1.5) 5.0 (1.5)
6821-12-54 6821-14-54 6821-16-54 6821-18-54 6821-20-54 6821-22-54
6821-12-54R 130 000 (3475) 6821-14-54R 177 500 (4745) 6821-16-54R 225 000 (6014) 6821-18-54R 280 000 (7484) 6821-20-54R 360 000 (9623) 6821-22-54R 435 500 (11641)
k Subtract 10% from flame dimensions shown for reduced port tile "R" version. m Fuel gas can be increased to match the cold air capacity with no chang to burner components however, fuel oil is limited as shown in the table above. Consult Fives North American Combustion, Inc. for special atomizer options.
WARNING: Situations dangerous to personnel and property may exist with the operation and maintenance of any combustion equipment. The presence of fuels, oxidants, hot and cold combustion products, hot surfaces, electrical power in control and ignition circuits, etc., are inherent with any combustion application. Components in combustion systems may exceed 160°F (71°C) surface temperatures and present hot surface contact hazard. Fives North American Combustion, Inc. suggests the use of combustion systems that are in compliance with all Safety Codes, Standards, Regulations and Directives; and care in operation.
CONTACT fna.sales@fivesgroup.com T +1 800 626 3477 - F +1 216 373 4237
Fives North American Combustion, Inc. 4455 East 71st Street - Cleveland, OH 44105 - USA www.fivesgroup.com
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