The Hosokawa Micron Denspack™ is a densification rotary valve based on proven rotary airlock technology and has been designed for the continuous de-aeration of powders. Applications include the densification of solids in a variety of industries and low-cost improvements to material packing efficiency as well as maximization of container volumes where space is a concern.

The design of the Denspack™ maintains a continuous and stable de-aeration process. It uses gravity and the aid of a vacuum to pull the powder into the rotor base which is made of a sintered metal filter and 6 separate pockets. A vacuum is created in the pockets in the charging position to remove any air from the product. The product in the pocket in discharge position is released with a small amount of air or an inert gas pulse, which prevents the metal filter from clogging.


The Denspack™ can de-aerate and increase the density of a wide variety of products dependent on the product’s characteristics, texture and particle size. The Denspack™ rotary valve is available with a capacity up to 25 m³/h.


  • Effective product densification
  • Saves on storage and transportation costs
  • Reduces the number of containers or big-bags required
  • Increases dry granulation efficiency
  • Low-cost solution for numerous aerated powder problems
  • Reduces dust leakage
  • Capable of dealing with difficult and adhesive materials
  • Works well as prime feeder in filling systems
  • Easy installation, operation and cleaning

Most industries will utilize the Denspack™ for reducing shipping and packaging costs. However in the case of volume dependent production, like extrusion and batch processes, it is beneficial to increase material density within a production process.

  • Cellulose and celluloid
  • Color Mixtures
  • Detergents
  • Silicone
  • Dried Fruits
  • Fish Meal
  • Pasta
  • Peas
  • Soy Protein
  • Bentonite
  • Catalysts
  • Zinc oxide
  • Cellulose
  • Pigments
  • Zinc Oxide


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