Our ASPIRATORS are designed to efficiently separate light trash from good cereals and grain. For this sole operation, an "AD" type aspirator (from which trash is sent directly to the dust collecting system) is recommended. If a separation of dust from the heavier grain is required, a decanting chamber is added to the aspirator, therefore transforming it into an "AS" type aspirator. Both types can be used as stand-alone units or combined to a rotary cleaner.