Oil-flooded rotary screw air compressors are a type of air compressor that use two interlocking helical screws to compress air. These screws rotate in opposite directions, trapping air between them and reducing its volume. The compression process is lubricated with oil, which helps to cool the air and reduce wear on the screws. The oil also helps to seal the gaps between the screws, improving efficiency and preventing air leakage. After compression, the oil and air mixture is separated, with the oil being cooled and recycled back into the compressor, while the compressed air is sent to a storage tank or used directly in various applications.