Flour
Flour is screened to remove any impurities that remain prior to packaging.
Milled or ground flour typically has a very fine particle size and the bulk density ranges from 560 to 720 kgs/m3. Flour is scalped in the 10 to 40 mesh range, with a screen size of 30 mesh being the most common for flour screening applications. Using this mesh size with synthetic screens allows hard flour to be screened at rates of 1000 PPH per square foot of screen area. Rates are even higher using stainless steel screens or screens with larger openings. Rates will be lower using soft flour.
In order to comply with food industry standards, machines are designed with hygiene in mind. Modifications have been incorporated to ensure that all fine material is screened and not left behind as soft lumps on the screen as a result of the flour pilling.
Such modifications and features include:
- gyratory motion that sifts the material through the screen rather than forcing it
- gentle action that minimises screen tears from foreign objects
- easy-to-clean sanitary designs
- ball mesh cleaning
- anti-pilling design
- low maintenance
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