Detroit® Underthrow Fuel Distributor

The Detroit® Underthrow Fuel Distributor is the ideal choice for spreader stokers burning coal containing a high quantity of fines and moisture


The Detroit® Underthrow distributor discharges the fuel on the underside of the rotor, enabling the blades to contact the coal for a longer period of time than other distributors. This design feature in conjunction with the pneumatic distributor plate, facilitates a more horizontal trajectory of fuel, therefore distributing the fine particles more consistently onto the bed area.

The Underthrow is:
  • Primarily used for coal distribution for spreader stokers
  • Can be retrofitted to virtually any spreader stoker application
  • Can also be used with fluid bed boilers.
Features and Benefits:
  • Water cooled rotor bearings
  • Pivoting rotor blades to mitigate jams
  • Heavy duty VFD driven motors to provide adjustment for varying fuel conditions
  • Adjustable fuel gate to regulate coal feed into rotor
  • Ideal for fuels inconsistent in size
  • Distributes fuels more consistently and evenly
  • Ideal for distributing fines and other inconsistent material at longer distances
  • Ideal for lower quality, less expensive coal
  • Fewer moving parts to maintain
  • Chain conveying carriage protected from direct radiant heat exposure 
  • Internal parts removable in two main assemblies
  • Internals can be replaced without removing feeder from the stoker front plate
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