Fire-All™, Dual-Fuel™ Burners - Fives North American Combustion, Inc. - #1

FIRE-ALL

Manufacturing Company DUAL-FUEL™ BURNERS

Bulletin 6514

May 2002

6514 FIRE'ALL Dual-Fuel Burners are nozzle mix, sealed-in burners for gas, light oil, or heavy oil. Capable of efficient operation throughout a wide temperature range, these burners are equally at home on low temperature ovens and high temperature forge and melting furnaces.

Ruggedly built for sustained, maintenance-free operation, 6514 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.

Oil. Oil viscosity at the burners must not exceed 100 SSU. Minimum atomizing air pressure at the burners is 14 osi for light oil, 22 osi for heavy oil.

Gas. Atomizing air (4 osi minimum) should be left on to protect the atomizer. Maximum required natural gas pressure at the burner for stoichiometric ratio is about ¹A of the combustion air pressure.

Air/Fuel Ratio. 6514 Dual-Fuel Burners are stable with at least 100% excess air. They also can operate with excess fuel with­out forming carbon, but additional air for complete combustion must be available in the furnace near the burner.

For limits in a specific case, either rich or lean, consult North American.

Turndown. Fire'All 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

1600 F.

Preheated Air. 6514 Burners are designed for use with ambi­ent air. They are suitable for some preheated air applications (up to 700 F preheat). Consult North American.

16 osi air pressure drop

24 osi air pressure drop

© Heavy oil at 150 000 Btu/gal. ©Natural gas at 1000 Btu/cf.