Another main production machine used in the production of flour and semolina is semolina purifier. This machine has a major importance in manufacturing semolina from hard wheat, in classification of semolina, and in production of low ash content flour from softer wheat.  Final product is obtained from semolina purifier. Flow control of the product is achieved thanks to the silk surface stretched on an aluminium frame. Sifting is formed by three levels of stretched fabric. Thanks to aerodynamics air duct and air flow adjustment flaps same vacuum level is formed on fabric surface thus semolina is separated from bran ands classified semolina is passed to the passage.    Vibrating Semolina Sifter can be manufactured either single or double layers. The aluminium frame prevents lost of silk in diagramme