The ARO-Flo Series sets the standard for air flow performance. These FRL solutions can keep your facility online and your equipment in shape because we combined best-in-class air flow performance with the flexibility to work in any environment.  Filters, regulators, lubricators, and piggybacks can be combined to­gether to form combinations. They are typically strung together in the F+R+L arrangement (three-piece combo) and F/R+L (two-piece combo) arrangement, although other configurations are also used depending on application needs. ARO-Flo combination FRLs are easily assembled using modular spacer kits.