The purpose of the sieves is as follows: homogenization of wet and dry products, obtaining particles of the product of a given size; reducing the size of large particles to the desired size; grinding particle agglomerates to the initial size; obtaining homogeneous granules. Sieve designs may vary. In the manufacture of tablet dosage forms, the starting bulk solids are usually sieved on machines with a vibrating principle of action. The principle of operation is that goods located at different levels of the shaft act as imbalances, as a result, the sieve performs circular oscillatory movements in the vertical and horizontal planes. The sieve is sealed with a lid during operation. The finished product and screenings come in different trays. The capacity of the sieve is 80-300 kg / h. Vibrating sieves are especially effective at sifting fine powders, because vibrating movements prevent clogging of the mesh screen openings.

Rotor screens are used to homogenize dry raw materials and products. In such sieves, agglomerates, lumps and pressing products are crushed and milled to produce grains with a given maximum size. This is a new sieve model with an optimized body shape.
The previously used narrowed form of the sieve is no longer used, since such a form can lead to a possible hang of the product. The housing of the updated sieve has a cylindrical shape along the entire length. Depending on the type of product being processed, the productivity of such a rotary sieve is from 20 kg / h to 5 t / h. GSF Glatt rotary sieves are used for wet powders and granules after the wet granulation process, grinding and grinding of the packed product.
The lower drive provides unhindered loading of the sieve with a wet product.

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