North American Sealed-In Tunnel Burners
Sheet 4651-2
Pilots, firing through a special port in the burner tile, produce a sharp flame for reliable burner ignition. Pilots are not included with the burners and should be ordered separately, with mounting brackets and extension tubes as required (see dimension table). If pilots are operated on an interrupted basis (rather than intermittent or constant), burner mountings will be cooler. 4651 Burners have no provision for flame detectors. Sheet 4651-1 lists replacement burner nozzles and special Ni- resist nozzles. To order, specify: 4651-(code for pipe size)-(capacity designation A, B, C, D if applicable) A or B (style of burner)/modifiers (SIL = Sillimanite Tile) Burner Complete.
Examples : 4651-01-A ½ " Style A Burner Complete w/Standard Tile Examples: 4651-1-AA/SIL 1" Style A Burner Complete w/SIL Tile
To order Nozzle Only, specify: _________-BO in third term (using A/ if necessary)
4651 Tunnel Burners are well suited for high temperature furnaces and kilns as internal parts are protected from radiant heat by the refractory tile. These premix gas burners are offered in Style A for 9" thick furnace walls and Style B for walls 13 ½ " or thicker. Sealed-in construction permits tight control of air/ gas ratio for optimum firing efficiency and control of furnace atmosphere. Light 4651 Burners at low fire, with free air in the furnace during a cold start-up. Hot furnaces can be tightly sealed. Burners can be turned down to 0.25"w.c. mixture pressure. Standard (alumina) burner tiles are suitable for combustion chambers up to 2500°F. For temperatures up to 2800°F, specify special sillimanite tiles. Install the tile in the furnace wall so it is surrounded tightly on all four sides by high temperature refrac- tory material.
Examples : 4651-01-BO ½ " Nozzle Only Examples: 4651-1-A/BO 1" Nozzle Only
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