Working Principle:  

The product feed into sieve boats through the feeder elevator. Each sieve boat has specific sizes of holes for impurities larger than the crop or smaller than the crop. Sieve boats inclines downwards where the crop moves whilst sieve boat vibrates and impurities fall of the sieve perforations.

To separate the straw, chip, glumes and etc. the product passes below the aspirator room. Aspirator room has five adjustable suction imports where crop exposed to air cleaning five times. After cleaning operation, the product transferred to the second section. 

The same cleaning can be carried out if necessary 1st scalping 2nd screening 3rd air screening. Or 1st and 2nd sieve boats can be for grading cleaned products and for prime product re-air screening. The cleaning system of under screen has brushes moving forward and back, so there is no risk for the screen to be blocked.

1-First part of the machine is for Pre Cleaning- scalping and screening (clean the large and small impurities from the product).

2-Second part of the machine is for Fine Cleaning: air screening up to five times in single process (to clean the light impurities from the product) at the same time screening (cleaning small impurities).

3-Third part of the machine (two sieve boats) Second Pre-Cleaning; scalping and screening (clean the large and small impurities from the product) Alternatifly- Screening Sieve Boat can be alocated for Grading (1).

4-Fourth part of the machine is for Fine Cleaning/Grading; another air screening up to five times in single process (to clean the light impurities from the product) at the same time screening or Grading obtaining graded-sized products. (Below screen