Effective and Energy Efficient

liquor blocking

The Duyvis tempering and filling systems are made specifically for the blocking-off of cocoa butter and cocoa liquor. The system can also handle most other fats and oils.

The tempering is based on the counter-flow principle.  The cooler consists of one and up to four cooling reactors with internal rotating scrapers.  A frequency controlled pump moves the product through the cooling tubes.  The scrapers thoroughly mix the semi-crystallized mass away from the chilled cooling reactor surface.

The boxes are automatically filled to the exact weight.  After approximately 5 to 20 minutes (for cocoa butter and cocoa liquor respectively), the product in the box is fully solidified and can be closed, transported and palletized.

During the short time it takes to transport the full box and replace it with a new empty box, the filling valve is closed and the product temporarily flows into a small buffer vessel.  This buffer empties itself when the filling is started again, thus saving filling time and energy.


  • PLC controled
  • two stage dosage for maximum precision
  • sophisticated design with all details complying with GMP standards


  • high capacity
  • excellent process control
  • reliable and maintenance free
  • maximum flexibility

Capacity range:

  • 500 – 2,000 Kilograms per hour duyvis wiener