Manual ab

TEMPEST® 4441 BURNER
Bulletin 4441
July 2011

4441 Tempest. Shown with traditional square block refractory tile "R" for hardwall furnace installation.

4441 Tempest. Shown with alumina/mullite tile "A" for fiber wall furnace installation.

The Tempest High Velocity Gas Burner continues to be one of the world's most widely used burners. Its high velocity jet action and superiorrecirculation promoting capabilities have brought both the quality benefit of close temperature uniformity and the productivity benefit of safe higher heating rates to a wide variety of applications up to 3000 F. Common applications include: periodic and tunnel kilns in the ceramics and refractory industries, forge furnaces, heat treat furnaces, galvanizing baths, scrap preheaters, carbon baking furnaces,cupolas, pipe coaters, portable refractory dryout and preheat equipment, and many more. The 4441 Tempest retains all the best features of the 4442: low NOx emissions, high excess air and excess fuel, direct spark ignition, integral meters, and sturdy cast construction, while improving stability range, maintainability, and stabilizer durability. New tile material and outlet shape choices provide greaterflexibility in installation and "flame fitting." Wider operating limits and expanded ignition and flame supervision capabilities make the 4441 ideal for use with StepFire™ or any pulse fired control system, as well as thermal turndown and cross-connected systems. All these improvements were made while preserving the original 4442 "footprint" including air and gas connections, so retrofitting is easy.• Flexible operating capabilities – Wide operating range -- from 30% excess fuel to 6000% excess air – Flame stability across full range to suit continuous and StepFire (pulse firing) control – Direct spark ignited with wide operating window – Low NOx emissions -- less than 60 ppm typical in 2000 F applications • Choice of flame supervision systems – Flame rod or UV detector • Tile options to fitthe application – Material: dense refractory or light weight alumina/ mullite – Exit shape: round or slotted – Alloy tile - see 4441A Aardvark • Dependable, long lasting cast construction – Design allows full access to internals – Alloy stabilizer bolted to main body – Built in air purge for observation port and UV scanner • Preheated air versions available upon request

Table 1. 4441 PerformanceData
Burner Size Air Flow, not burning at 16 osig (scfh) Air Flow, Stoic at 16 osig (scfh)* Max. % XSA, (ignition and flame rod/UV limit)** Max. % XSF, (ignition and flame rod/UV limit) Flame Length (in.), Stoic at 16 osig air Flame Diameter (in.), Stoic at 16 osig air Gas Pressure (osig), Stoic at 16 osig air Gas Pressure (osig), 30% XSF at 16 osig air -1 1560 1250 3000 30 10 2 8.3 9.4 -2 27002200 5000 30 12 2 8.2 9.3 -3 4000 3300 5000 30 13 3 8.0 9.3 -4-A 6100 5250 5000 30 20 5 10.8 14.2 -4-B 8100 6900 5000 30 22 4 9.6 13.3 -5 11150 9500 6000 30 28 6 7.2 8.0 -6 19000 15000 6000 30 36 7 9.0 9.9 -7 26000 22000 6000 30 45 8 7.0 7.7

* Nominal capacities. Actual capacities may vary based on tile selection. ** Limits may vary depending on flame supervisory equipment used.

Bulletin 4441Page 2

General Operation and Control
• • • •
Capacity: 125,000 to 2,200,000 Btu/hr with 16 osig air pressure. Combustion Air: 0.2-24 osig air pressure. Fuel: Natural gas only, gas pressure varies per size but 11 osig maximum required at design capacity.† Flame Supervision: Flame rod or UV detector. Consult National Safety Standards and insurance underwriters for specific flame supervisionrequirements. Flame supervisory components must be ordered separately. See Dimensions and Part List 4444-1 for correct flame rod part number. Ignition: Direct spark (no pilot) with 6000 V transformer. A halfwave transformer prevents UV sensing of the spark during trial for ignition. Ignition not recommended above 16 osig main air pressure. Control: Excellent performance with all control systems;...