Control: Normally, air primary with a cross-connected, pressure balance regulator. For maximum turndown, use a (biased) Regulator, or throttle gas only. To protect burner from heat damage, do not set air pressure below 2”wg in a 850oC furnace, or below 3”wg at 1000oC (whether gas is on or off). Gas pressure requirement: About 2”wg at the burner for natural gas on stoichiometric ratio; about 1/5 of the air pressure for coke oven gas. Preheated air: 2514 Burners are suitable for some applications with air preheated to 400oC.
Burner Block/Installation: Burner Blocks are cast refractory rated for 1450oC furnace temperature. They should be supported securely in the furnace wall by a layer of castable refractory at least 9″ thick all around the Burner Block, extending back to the furnace shell and securely anchored to it. Burner Blocks are replaceable in the field except for the 2514-10A, whose mounting must be returned to the factory for Burner Blocks replacement. The 10A size is also available with a short Burner Blocks that extends 2″ past the mounting plate. The remaining Burner Block length is then field constructed. For furnace walls thicker than the length of the Burner Block, tunnel beyond the end of the Burner Blocks should be flared at least 30°, starting at the OD of the Burner Block. If this is not practical, consult ATEC Experts for specific recommendations.