Image Wilkerson FRLs R28 Standard Regulator Markets Food & Beverage / Pharmaceutical, Steel Processing, Transportation Jump to Section Product Options Related Products Product Options Part Number FRL Size R28-03RG Standard R28-04RG Standard R28-06RG Standard R28-03R Standard R28-04R Standard R28-06R Standard Related Products Image Wilkerson FRLs B28-Series Standard Filter/Regulator Image Wilkerson FRLs C28-Series Standard Combination Unit Image Wilkerson FRLs F28-Series Standard Airline Filter Image Wilkerson FRLs L28-Series EconOmist® Standard Lubricator