Posted in | Materials Analysis

Hosokawa Micron have Introduced the Viblette VBL for Laboratory Sieving

Well known for its iconic Alpine Air Jet Sieve for laboratory sieving and particle size measuring of fine powders, Hosokawa Micron has now introduced the Viblette™ VBL for fast, accurate wet sieving in the laboratory.

The new unit has applications when wet sieving has to be used for analysis due to the dry material’s highly cohesive nature. Examples of such materials would be carbon black, some mineral fillers and some dielectric materials.

This state of the art machine uses enhanced vibration to deliver short measuring times up to 1/3rd  that of conventional wet sieves. The electro magnetic vibration mechanism breaks the liquid film formed on the sieve surface, which is a problem with other wet sieving devices. This ensures effective powder wetting and short sieving times.

Viblette™ wet sieve. Image Credit: Hosokawa Micron.

The incorporation of specially designed showering nozzles allow the Hosokawa Micron Viblette™VBL to achieve accurate sieving  using up to 1/6th the amount of water than conventional wet sieves.

Liquid is sprayed through sprinkler shower nozzles onto powdery sample on the sieve. The sprinkler rotating above the sieve is driven by liquid pressure and the design ensures even wetting of the powder and independent control of both liquid rate and rotation speed is provided to ensure maximum versatility. There is very little wash liquid waste.

Repeatability of testing is ensured as sprinkler rotation, liquid rate and the amplitude of vibration can be varied and controlled to preset levels. This ensures consistent repeatability and very accurate measurement of particle size.

In addition to the standard 200mm drum size an adaptor is provided so that 75mm sieves can be used up to 3 sets for simultaneous measurement. Even 10micron screening is possible with the new Viblette™ VBL.

The Viblette™ VBL can process quantities of slurry up to 10 Litres/minute and uses a special optional feeding device for this application as required.

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