Product Overview | 4446 Tempest®
SPECIFICATIONS Fits flush with kiln walls 9" or 10 ½ " to 28" thick. Maximum chamber temperature is 2600°F. (Consult North American for higher temperatures.) Spark ignited, no pilot.
High velocity burners improve the performance of many furnaces and kilns by creating recirculation and stirring of furnace gases, which enhances heat transfer and temperature uniformity. High velocity also increases heat penetration into and around loads. 4446 Tempest High Velocity Gas Burners put the burner discharge at the inside face of the kiln wall for maximum effect from burner velocity. Kiln temperature can be as high as 2600°F. Higher temperatures will be considered depending upon how the burner is to be installed and operated. 4446 is available in three models for different wall thicknesses. The -S model has a fixed flange 9" from the burner tip. The two longer models have an adjustable flange that is easily locked in position. See dimension table for minimum/maximum "Z" dimensions. Due to internal backpressure, individual air/gas ratio regulators are recommended with each burner. (This is true of all high velocity burners.)
Provision for ultraviolet flame detection. Natural Gas (minimum pressure 10 osi).
4446 Performance Data
Combustion Air Capacities, scfh ‡ (for Btu/hr multiply by 100)
Approx. Approx. Max. % Max. % Flame length Flame dia
Burner
at 1.0 osi
at 4.0 osi
at 8.0 osi
at 16.0 osi
XSAir
XSFuel
at 16 osi, stoich.
at 16 osi, stoich.
designation firing stoich. firing stoich. firing stoich. firing stoich. (stability) * (stability) *
6,300
9,000
400 400
30 30
42"
5"
4446-5
2,200
4,500
4446-6
3,500
7,200
10,100
14,300
60"
7"
Direct spark ignition (6000 V) is possible at 4 osi air and below, but do not use a 4067B Hot Rod.
† For wall thickness over 28", consult Fives North American Combustion, Inc. ‡Main air capacities can fluctuate ±10% due to tile temperature effects. * Same limits apply for UV flame supervision.
Bulletin 4446 Page 2
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