Cardar farms, or “cardar” systems, in solvent extractors are specialized components designed to optimize the extraction process. These systems use a series of mechanical devices or “cards” to handle and process the material being extracted. The design typically involves a series of rotating or stationary elements that help to evenly distribute and process the material as it interacts with the solvent. This arrangement enhances the efficiency of solvent extraction by ensuring thorough contact between the material and solvent, improving the overall yield and quality of the extracted product.