Shopping Cart (0) Quotes (0) Express Ordering All Categories > Clean Air Treatment > Regulators > Wilkerson Regulators > Wilkerson R21 Regulators > View Items All CategoriesAll Categories Clean Air TreatmentClean Air Treatment RegulatorsRegulators Wilkerson RegulatorsWilkerson Regulators Wilkerson R21 RegulatorsWilkerson R21 Regulators View Items Wilkerson R21 Regulators Email This Page Download PDF Download PDF Printable Page Wilkerson R21 Regulators Wilkerson Regulators /Asset/wilkerson-inline-regulator-r21.jpg Close Window Standard FeaturesBalanced Valve DesignNon-Rising Pressure Adjusting DialHigh-Relief Flow (3/16"Â Relief Orifice)Two 1/4" Gauge PortsPiston Operated