Sunflower seeds contain more than 45% of oil. The seeds are first subjected to decortication to obtain high protein meal, the domesticated Sunflower Seeds Solvent Extraction Plant are subjected to mechanical extraction. In one method only pre-pressing is carried out leaving 18 to 20% as residual oil in the pre-pressed cake. In the second method full pressing is carried out in screw presses leaving 10 to 12% residual oil in the fully pressed cake. For recovery of residual left over oil in the cake, the cake is subjected to solvent extraction process.