Ruggedly built for high fire operations, maintenance-free operation, 3514 Burners also provide for quick change of fuels without disturbing process operations. Sealed mountings help maintain furnace pressure, controlled atmosphere, and closer air/fuel ratio control--all contributing to better product quality. Fire All Burners have been used for years on all types of furnaces with great success.

COMBUSTIONPERFORMANCE

Oil. Oil viscosity at the burners must not exceed 70 to 90 seconds redwood. Minimum atomizing air pressure at the burners is 21”wg for light oil, 40”wg for heavy oil.

Gas. Atomizing air (6”wgminimum) should be left on to protect the atomizer. Maximum required natural gas pressure at the burner for stoichiometric ratiois about 25%of the combustion air pressure.

Air/Fuel Ratio. 3514 Dual-Fuel Burners are stable with at least 100% xces air. They also can operate with xces fuel without root formation, but additional air for complete combustion must be available in the furnacenear the burner.

Turndown. FireAll Burners can be turned down to atomizing air only (with fuel to match) except when burning residual oils in a cold, tight furnace. For prolonged operation on atomizing air only, specify an alloy burner nose if furnace temperature is above 850^oC.

Hot Air. 3514 Burners are designed for use with ambient air. They are suitable for some preheated air applications where the burner can with stand upto 350^oC.

FLAME SUPERVISION
Flame safeguards are recommendedfor all installations. An ultraviolet cellwillmonitor pilot ormainflame. ilotsmust be interrupted after a preset ignition period (usually 15 seconds) so flame detectorsmonitor main flame only. Purge UVwithcleaning air tokeepoil fogoff the lens.

BURNER BLOCKS / INSTALLATION
Burner blocks are cast refractory rated for 1500^oC furnace temperature. They are replaceable in the field, except for the 3514-10A whose mounting must be returned to the factory for burner block replacement (or purchase a spare
mounting plate with a burner block cast onto it). Burner blocks should be supported securely in the furnace wall by a layer of castable refractory (not insulation) at least 9" thick all around the burner block, extending back to the furnace shell and securely anchored to it. For furnace walls thicker than the length of the burner block, the tunnel beyond the end of the burner block should be flared 30-45^oC from the centerline, starting at the OD of the burner block.

Jacketed Burner Blocks. 3514 Burners are available with support jackets around the burner block for applications
where the burner block is not supported by furnace refractory. Jackets are available in three different metals and have maximum temperature ratings for each. They must be protected with sufficient insulation so as not to exceed
rated temperature. Maximum temperature rating for jacket metals depends upon frequency of heat-up/cool-down cycles. As an example, batch annealing furnaces that are heated and cooled every day should use the "intermittent
exposure" ratings. Continuous annealing furnaces that remain at the same temperature formonths at a time, can use the higher "continuous" rating.