The Evenglow LNx radiant tube burner is well suited for new and retrofit applications where low NOx performance is desired. The NOx-reduction technique recirculates flue gases from the exhausting leg of the radiant tube or companion heat recovery recuperator. Combustion air induces flue gases through a recirculation tube where it is progressively mixed in staged combustion zones delivering the low NOx performance. This patented method allows for stable operation from cold start-up to full operating temperature without the need for complicated controls. The Evenglow LNx is truly “plug and play” compatible with most existing systems. As with other burners in the time tested Evenglow family, the flame of the Evenglow LNx can be tailored to the application. An easy to access adjustment located on the burner controls the amount of air premixed with the fuel, optimizing the flame length for the radiant tube. This adjustment can be made while the burner is firing, without having to disassemble and adjust any of the burner internal parts. — Patented progressive flue gas dilution assures predictable low NOx performance and consistent ignition — Passive design utilizes combustion air to induce flue gases from radiant tube exhaust — Low NOx retrofit using existing fuel/air ratio control components — Compatible with preheat air up to 800°F (427°C)
The durability of the Evenglow family is retained for the Evenglow LNx including high alloy cast flame retainer and sturdy cast iron throughout. Evenglow LNx burners include a built-in V-port fuel adjustment plug (ambient air only), multiple observation ports, a flanged air connection, and a gas connection that can be rotated in 90° increments. Flame ignition is accomplished with the included direct spark igniter. Flame monitoring is possible by ultraviolet flame detection (sold separately). The Evenglow LNx is available in three capacity series. To allow optimization of system design each capacity can be achieved at three combustion air pressure series as outlined in Table 1. For best performance and maximum turndown, the highest available pressure series should be selected.
Table 1
Maximum Burner Capacity
Radiant Tube I.D. Range
Cold Combustion Air
Preheated Combustion Air
Capacity Series
(Btu/h HHV) @ 60°F Air
(Kw/H LHV) @ 0°C Air
(Btu/h HHV) @ 750°F Air
(Kw/h LHV) @ 400°C Air
Min
Max
Pressure Series
(in)
(mm)
(in) (mm)
16 12 8 16 12 8 16 12
800
1,172,740
310
800,000
212
5
146
7
191
600
879,555
233
600,000
159
5
146
7
191
400
586,370
155
400,000
106
5
146
7
191
8
Bulletin 4723LNx Page 2
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