Engineered and
Built to Order

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Capacity: 10,000 - 300,000 lb/hr

Fuel Capabilities: Digestor Gas, Fuel Oil, Hydrogen, Natural Gas, Other Fuels

Steam Design Pressure: Up to 1,200 psig


General Description

The Appalachia is custom designed for firing either natural gas, oil, or solid fuel. The boiler’s convection bank tube spacing is designed for moderate gas velocities.


  • Gas outlet configuration: top
  • Available as a Modular Boiler System
  • Superheated steam temperature up to 900°F with Radiant Superheater
  • Offered in the patented DFW design


  • Rectangular Furnace
  • Open bottom units suitable for solid fuel firing
  • Available for pressurized or balanced draft operation.
  • Can be shipped as a self-contained, fully assembled unit
  • Custom designed “knocked down” for site assembly or for other site and application requirements.
  • Convection bank tube spacing is designed for moderate gas velocities.


100% Furnace water-cooled membrane wall construction
Air-tight full membraned front, rear, and side exterior walls
0.25″ thick membrane fin plate
All drilled drum holes are grooved
Minimum tube thickness exceeds ASME requirements:
– 0.105″ min. wall convection tubes
– 0.120″ min. wall furnace tubes
Economizer designed and built by Superior
All ladders and platforms are fit and bolted to boiler then disassembled for shipment


Packaged boilers are trimmed with necessary safeties and code piping and signed off on by code inspectors. Factory mounted and wired, proven and reliable packaged burners are available from your choice of burner manufacturer.

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