With the demand for food regulation and certification constantly growing, companies are continually looking for new ways to increase their screening output.

In a demonstration video, pistachio and rapeseed powders are sieved using a Russell Finex 22 screening machine, in order to consistently obtain the finest grade powder.

The company devised a cryogenic method of freezing the powders with nitrogen, before the sieving process to reduce the release of oils during the process, which can result in blocked meshes.

However, blinding of the mesh can occur, which can reduce flow rates, increase loss of good product and increase downtime in the production process to clean the mesh.

Upgrading the Finex 22 industrial sieve with the Russell Vibrasonic deblinding system eliminates mesh blockage, allowing powders to be screened consistently and effectively.

Batches of nitrogen-processed pistachio powder are fed into the Finex 22, where the vibration of the machine, available in high-speed for difficult applications, sieves the powder through the 500 micron mesh.

An ultrasonic frequency is applied to the mesh, breaking the surface tension, which eliminates mesh blinding and keeps the screen area clear. The ultrasonic sieving device results in a high-quality uniform graded material.