Air preparation equipment is an essential component of pneumatic systems, providing multi-stage conditioning of compressed air to ensure the reliable operation of pneumatic parts. The lubricator (AL) atomizes lubricant into the airflow to achieve lubrication, with different specifications varying in port size, flow rate, and oil capacity; the filter-regulator + lubricator unit (ARC) integrates pressure regulation, filtration, and lubrication for one-step multi-stage air treatment; the filter-regulator (ARF) combines pressure regulation and filtration to remove impurities and adjust pressure, with options for various filtration grades and drain types; the pressure regulator (AR) mainly adjusts compressed air to the stable value required by the system, with different specifications corresponding to various flow rates and port sizes; the filter (AF) is used to remove moisture, oil, and solid particles from compressed air, offering multiple filtration grades and drainage options to ensure air source cleanliness.