FRL Pneumatic Air-Treatment Unit — A Filter + Regulator + Lubricator

Filter: removes water, dust, and impurities from compressed air. Regulator: controls and maintains the air pressure; the pressure is shown on the gauge. Lubricator: adds a small amount of oil mist to lubricate pneumatic tools and equipment. It is commonly installed between an air compressor and pneumatic tools/machinery such as spray guns, air drills, impact wrenches, and cylinders.