D-Type Elevated Drum

  • Assembly: Field Assembled
  • Steam Flows (lb/hr): 200,000 - 1,000,000
  • Construction: Membrane Wall Construction
  • Emissions (ppm NOx): <5 with SCR
  • Steam Temperature: Up to 1,050 deg F
  • Fuel: Natural Gas, #2-#6 Oil, Refinery Fuels, Alternative Fuels
  • Circulation: Natural Circulation
  • Type: D-type Elevated Drum
  • Steam, temperatures to 1,050°F
  • 200,000 to 1,000,000 lb/hr
  • Natural Gas, #2 and #6 oil, refinery fuels, alternative fuels, combination
  • Design pressure up to 1,800 psig
  • Available to less than 5 ppm NOx, Ultra-Low CO


The Cleaver-Brooks D-type elevated drum design maximizes shop assembly time while minimizing the cost of field labor often associated with boilers of such high capacity. 

  • Product Overview
  • Related Resources
  • Applications
  • Minimal field assembly.
  • Faster, more cost-effective delivery time versus field erect boilers.
  • Reduced gas-side pressure drop and smaller forced-draft fans.
  • Superheat option available.
  • Dual burners for some applications.
  • Can accommodate selective catalytic reduction (SCR) and CO catalyst .


The D-type elevated drum is a 100% membrane water-cooled furnace, reducing costly, time-consuming, annual maintenance. The front and rear walls are welded and refractory-free, as well as the burner throat, when integrated with our Natcom® burner. D-type boilers can be customized to provide superheated steam. We offer both single- and dual-stage integral superheater systems with optional temperature control over turndown.


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