Home Product Cleaning & Conditioning Aspirator ASPIRATOR Air-Based Grain Cleaning. Uses a controlled stream of air to separate light impurities from wheat. Removal of Airborne Impurities. Lifts dust, chaff, husk and other lightweight foreign materials from the grain stream. Separation Through Airflow. Light materials are carried away from the heavier wheat during aspiration. Impurity Discharge. Separated foreign materials are removed from the system. Clean Grain Transfer. Wheat continues to the next processing stage after the lighter impurities have been removed.