Oil Expellers:
First Method:
Only pre-pressing is done in which case seeds are lightly pressed and leaves about 14% to 18% oil in the pressed cake. This method results in higher capacity; lower power consumption, lower wear & tear / maintenance. It is recommended when the buyer has his own solvent extraction line, so that balance oil is recovered during solvent extraction process.
Second Method:
When pressed cake is to be sold in the market, it is desirable to recover the maximum oil by Mechanical Extraction. Hence double or more pressing system is recommended. Here either in the same screw press - two stage pressing is carried out or pre-pressed cake from first stage screw press in sent for second pressing to other screw press. The oil left over after double pressing varies from 5% to 9% depending on the oil seed and extent of pressing.
Special Preparatory Required Equipments:
Any oil-bearing seeds can be processed in an oil mill (mechanical extraction system), special preparatory equipment are recommended prior to expelling. For Cottonseed, Sunflower seed, Groundnut seed- Decorticators are recommended. For Copra and Palm kernel- Cutters & Hammer Mills are required as preparatory equipment.
BIPL manufactures quality oil expeller machines ensuring that while expelling the oil :
Maximum oil recovery is done with minimum power consumption
The cake is not burnt
Proteins, vitamins and nutrients are not damaged
Colour fixation of oil does not take place
Minimum heat is generated while expelling process
Moisture does not find its way with extracted oils
Filtration is done in such a manner that no cake particles remain in contact with oil, thus FFA of oil is not increased.
