Screw Compressor Oil Filters are high-pressure spin-on cartridges designed to remove metallic wear particles, carbon deposits, and oxidized "varnish" from the compressor lubricant. In a rotary screw system, the oil not only lubricates but also seals the rotors and cools the air-end, making the oil filter the primary safeguard for the most expensive part of your machine. Unlike standard automotive filters, compressor oil filters must handle high operating pressures (up to 25 bar) and aggressive synthetic fluids (like Ultra Coolant or Sigma Fluid) without the sealing gaskets swelling or the media collapsing.