FRL Units and Auto Drain

(Also known as Air Preparation Units / Filter–Regulator–Lubricator Assemblies with Automatic Drain)
FRL Units — short for Filter, Regulator, and Lubricator — are air preparation devices used in compressed air systems to ensure clean, dry, properly pressurized, and lubricated air is delivered to pneumatic tools and equipment.They are often installed near the air compressor outlet or at individual workstations, forming the first line of protection for air tools, cylinders, and valves. An Auto Drain is an automatic condensate removal device that continuously or periodically discharges accumulated water and oil from the air filter or receiver tank, keeping the air supply dry and preventing corrosion or tool damage.