Spiral Sorters

Precise separation by rolling behavior and seed shape

The separation principle is based on the different rolling behavior of the product on the spiral: round seeds accelerate faster than flat, broken or irregularly shaped particles and can therefore be separated efficiently.

Spiral sorters are mainly used when other sorting processes alone are not sufficient or when an additional separation by seed shape is required.

Typical applications:

• brokens, stones, stems and shells from soybeans
• brokens, stems and grain from coriander
• grass seeds from poppy seed
• vetches out of grain
• brokens and foreign seeds from rapeseed
• brokens and foreign seeds from mustard seed
• brokens, stems and plant parts from peppercorns

Rotary Sorters for highest precision

Rotary spiral separators provide consistently high separation accuracy and are therefore used particularly for demanding seed and food applications. Due to the rotating spirals and the stepless adjustable rpm, the sorting process can be adapted much more precisely to the product and separation task.

Especially in soybean processing, the rotary sorters are the most profitable units in the entire line, as they achieve high product upgrading with comparatively simple mechanical separation.

A major advantage of rotary spiral separators is the active control of the centrifugal forces acting on the product. While standard spirals are mainly determined by spiral geometry and rolling behavior, the rotary version provides additional process control through speed and direction of rotation.

Enclosed Spiral Separators

Enclosed spiral separators are a robust and proven solution for separation by rolling behavior. They are suitable for many standard sorting tasks where reliable and economical separation of round and flat particles is required. The machines can be equipped with 1, 2 or 4 spirals and can be adjusted to the respective product via feed regulation and discharge slides.