Product Overview | 4445 & 4445N Tempest®
— Standard lengths available for 9" to 40" (229mm - 1016mm) wall thicknesses longer lengths available on request — Field adjustable mounting flange — Suitable for up to 2900°F (1593°C) operation — Low NOx emissions — Tile options to fit the application: – Two tile materials: alumina/mullite, and metal alloy – Two tile exit shapes: round and slotted Round tiles produce high forward thrust, Slotted tiles produce wider and thinner flames with more entrainment. FEATURES
High velocity gas burner for thick wall kilns and furnaces — standard lengths available for 9" to 40" (229mm - 1016mm) wall thicknesses
Enhanced temperature uniformity and heat transfer promoted by recirculation of combustion products, improve both product quality and productivity in many kilns and furnaces. True high velocity burners entrain and recirculate products of combustion (poc) volumes seven or more times greater than the actual tile exit gas volume, potentially eliminating the need for excess air operation or hot gas recirculation fans. Designed for mounting in thick walls, the 4445 Tempest High Velocity Gas Burner places the tile discharge at the hot face, increasing entrainment and providing superior uniformity. Although used predominantly in ceramic kilns, other applications that can benefit from the 4445’s high velocity characteristics and design features include:
UPDATED 4445N FEATURES
The new 4445N-2 through -4-B design replaces the same size 4445 burners, and has many improvements, including:
— 90° Air inlet for all sizes — Built-in gas limiting orifice valve (sizes -2 through -4-B) — New baffle to prevent incorrect placement of igniter — Simplified tile mounting for easier tile replacement — Improved ceramic insulators for igniter and flame rod To maintain a common naming system the 4445-5 and -6 sizes (which have always had a 90° air inlet) have been renamed 4445N-5 and 4445N-6. Most spare parts for the 45° air inlet legacy burners will continue to be available, and many of the 4445N improvements will be incorporated into the legacy 4445 replacement parts.
Box and Car Heat Treat Furnaces Galvanizing Tanks Lead and Zinc Pots Salt Baths and other thick wall applications
4445/4445N Natural Gas Performance Data
Performance for 16 osi/27.7"w.c./69 mbar main air pressure operating at stoichiometric ratio (unless stated otherwise)
Burner Size
-2
-3
-4-A
-4-B
-5
-6
Air Flow, not burning scfh (Nm 3 /h) Air Flow, burning scfh (Nm 3 /h)*
2320 (62) 2065 (55)
3650 (98) 6600 (176) 3350 (90) 5800 (155)
8050 (195) 10 900 (291) 17 900 (478)
7300 (195)
9260 (246) 14 400 (385)
Max. % XSA (ignition & flame rod limit)** Max. % XSF (ignition & flame rod/UV limit)
1500
1000
1000
1000
1500
1000
30
30
30
30
30
30
Flame Length inches (mm) Flame Diameter inches (mm) Gas Pressure inches w.c. (mm)
12 (305) 2.0 (51) 17.3 (43)
16 (406) 3.0 (76) 15.6 (38)
24 (610) 4.0 (102) 17.3 (43)
28 (711) 4.5 (114) 15.6 (38)
24 (610) 3.0 (76)
26 (660) 4.0 (102) 14.5 (36)
13.8 (34.5)
*Nominal capacities. Actual capacities may vary based on burner length and tile selection. ** UV limits may differ.
Bulletin 4445/4445N Page 2
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