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“O” Series

Indeck watertube boilers

Indeck’s “O” Series watertube boilers are designed with the flexibility in mind. The versatile drum orientation allows Indeck’s “O” model boilers to meet unique project requirements for shop-assembled or field-erected boilers. The “O” type watertube boiler is capable of producing steam up to 1,000,000 lb/hr at design pressures over 2000 PSIG and superheated steam over 1,050°F.

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Features & Benefits


  • High service factors for severe duty applications
  • High steam pressure and temperature applications
  • Adaptability to unique fuels
  • Quick ramping capabilities throughout the load range
  • Flat superheater curve over the load range
“O” Series
20,000 – 1,000,000 LB/HR
150 – 2,000 PSIG
Natural Gas, Various Waste and Off-Gasses, #2 – #6 Oil
Saturated and Superheat up to 1,050°F
Stocking Program
  • Many Units of Various Sizes and Types Available for Immediate Shipment
  • New and Reconditioned Units Available
  • Standard Inventory Includes 250,000 PPH Units with High Pressure and Superheat
  • Matching Auxiliary Equipment in Stock
  • Water Cooled Membrane Wall Construction (Including Front and Rear Walls as Specified)
  • Appropriate Heat Releases for the Application
  • Sized for Flame Dimensions to Achieve Best Possible Emissions
  • Minimal Refractory to Reduce On-Going Maintenance
  • Fully Accessible for Inspection
  • All Tubes Connected Drum to Drum with No Intermediate Headers
  • Ligament Efficiencies and Corrosion Allowances that Meet or Exceed ASME Code
  • Up to 3 Stages of Internal Moisture Separation for Most Stringent Steam Purity Requirements
  • Internal distribution piping to provide positive circulation
  • Radiant/Convective Superheater Design
  • Assemblies Completely Self-Supporting (No Intermediate Support Brick Required)
  • All Elements of Equivalent Length Ensuring Balanced Flow
  • Conservative Velocities Inside Tubes Assure Positive Cooling at All Loads
  • Fully Drainable
  • Designs Specific to Client
  • Requirements that Meet or Exceed All ASME Codes and ABMA Guidelines
  • Implements Most Appropriate Accessories to Ensure Compliance to All Performance Guarantees
  • Over 150 Years of Boiler Experience