Function: wheat hulling (optional), air cleaning, pre-cleaning by two layers sieving trunk, two time gravity separating and gout sieve layers fine sieve cleaning.

Wheat are fed into wheat huller to hulling, then lifted up by bucket elevator, enter to pre-cleaning vibratory sieving trunk for quick removing small, large impurity, and light impurity, then wheat enter to two gravity tables for removing the bad seed (partially eaten, immature, insect damaged, sick seed, etc. ).

Finally wheat enters to the second vibratory sieving trunk for removing oversized & undersize impurity again, also grading seed to different sizes. Wheat from outs becomes seed which can be sowed in ground directly.