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DE-STONER® Drop-Out Boxes

Increase the performance of your DE-STONER® Air Classifier with GK’s Drop-Out Boxes and Air Recirculating Systems. Combining these features creates a Near-Zero discharge system.

This Near-Zero discharge system captures the air exiting the discharge end of the DE-STONER® , then recirculates it back through the machine to reduce material blow by and dust emissions. Standard and custom designs for all models of GK DE-STONER® Air Classifiers are available to suit the application.


  • Near-Zero emissions for a cleaner facility and environment.
  • Directs material to a single location.
  • Heavy-duty, built-to-last construction.
  • Works with all new and existing DE-STONER® Air Classifier equipment.