HMA-2 & HMA-2A Series

Direct-Fired Make-Up Air Burner

Midco International is proud to introduce our new direct-fired gas burner, initiating a new era in direct-fired gas burner technology.

Technology in Direct-Fired Gas Burners

Our innovative two stage combustion burner is not just a modification or improvement to our HMA product line, but a completely new approach to direct-fired combustion. The two-stage combustion improves control of the flame process, meets and exceeds the new ANSI Standards and outperforms the competition. By having two separate flames within the burner combustion zone, the flame is more stable, shorter and cleaner. Two stage combustion reduces emissions allowing for higher temperature rise, wider operation range, easy installation, and simple profile opening.


Technology for Direct-Fired Applications Plus Flexibility in Configuration

Straight, elbow and tee sections easily configure to desired capacity maximizing efficiency for installation and performance. Burners may be ignited by proven pilot or direct spark. Pilots are available for flame rectification or ultraviolet detection. Hot surface ignition systems are also available. Contact the factory for specifications.

Features & Benefits

  • Reduced NO2 and CO Emissions: Lower emissions levels that easily pass the new ANSI Z83.4 and Z83.18 standards.
  • Higher Temperature Rise: The two stage combustion process lowers NO2 emissions which is the limiting factor in temperature rise.
  • Increased Capacity: Up to 750,000 BTU'S per foot. (Higher BTU levels can be achieved if ANSI Z83 Standards or CO and NO2 emissions are not of a concern. Process heaters can fire up to 1,000,000 BTU'S a foot or more.)
  • Increased Differential Pressure Drop and Higher Velocities: HMA-2 burners can operate between 0.05" to 1.4" W.C. differential pressure range or in air velocity between 800 fpm to 4000 fpm.
  • Flame Stability: Two stage combustion provides better flame stability and emission control, allowing for a shorter flame and easier profile configuration.
  • Reduced Inventory Costs: Single burner casting can be fired with natural, propane or butane gas1, reducing burner inventory.
  • Reduced Shipping Costs: A smaller and lighter casting reducing your freight costs up to 50%.
  • Turndown: 30-1 turndown can easily be achieved with proper modulation control and for modular gas valves. (Higher turndown is possible depending on equipment design.)

1 Consult factory for applications using butane fuels.