Product Overview | Radiant Tube Gas Burners
BENEFITS
Adjustable flame geometry:
— 4725- -E Direct spark ignition — 4725- -G Spark-ignited gas pilot — 4725- -M Manually-ignited gas pilot
— Engineered combination of diffusion flame and variable partial premix via primary air adjustment permits flame shaping as required to match tube geometry. — Partial premix provides early heat release to tube surface adjacent to burner. — Delayed mixing results in highly radiant diffusion flame, distributing heat release more uniformly along length of radiant tube. — More uniform tube temperature results in longer tube life and better control of product temperature.
Evenglow burners include: built-in V-port adjustment, primary air adjustment, observation port, and one of three ignition methods. Mounting and Installation. Each burner is flanged for easy mounting on a radiant tube. See Table 1a for suggested tube sizes. In general, the distance from the burner flange to the inside of the furnace wall should not exceed 18". This avoids overheat- ing the tube inside the wall. For greater wall thicknesses consult North American . For additional information on installation, see Sheet 4725-1.
Designed for low maintenance and reliable ignition:
— Unique ignition arrangement eliminates the need for high- maintenance, bayonet-style pilot or long electrodes. — Pilots and electrodes are located in cool zone near furnace wall. — First wave of partial premix results in reliable ignition and attachment of the flame front to the flame anchor. — Glow pilots available for easy visual checking. — Investment cast HT30 flame retainer enhances service life (included on all versions, E, G, H and M).
Table 1a . CAPACITIES and TUBE SIZES. Capacities shown are with 30% primary air (+70% secondary air). For capacities in Btu/h HHV, multiply cfh air capacity by 100. Apply correction factor from Table 1b for 20% or 40% primary air operation.
cfh Air Capacity with Air Pressure across the burner of
Burner
Radiant Tube inside diameter
designation
1 osi 5 osi 6 osi 8 osi
12 osi 16 osi
4725-2-E, -G, or -M 4725-3-E, -G, or -M 4725-4-E, -G, or -M 4725-5-E, -G, or -M
585 885
1300 1980 3240 5300 8300
1430 2160 3540 5800 9100
1650 2500 4100 6700 10500
2010 3050 5000 8150 12900
2330 3540 5800 9500 14800
3 ¾ " min to 4 1⁄8 " max
3 ¾ "
5 ¾ "
1450 2370 3710
4 ¾ "†
6 1⁄8 "
5 ¾ " 5 ¾ "
6 1⁄8 " 8 ¼ "
4725-6-E
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