... filter machine 1.Higher oil rate and good line 2.ISO 3.18years experience on oil machine 4.24 hours 6YL ... kernel, soybean, etc. Before prepressing, you have to pretreat oilseed by cleaning, screening separation, washing, hulling, softening, flaking, cooking etc. ... pretreatment, also is the fist step of making edible oil. By using Wind-driven separator, dust removing system, magnetic separation, ...