Ari unit-OFR 1,working pressure::0.5-12bar 2,port size:1/8,1/4,3/8,1/2,3/4,1" 3,drain:manually,semi-auto,auto Filter and pressure regulator combine a single unit ,and cleans the compressed air of fluid oil,condensation and dirt particles.For special application,the standard 40μm filter element may easily be replaced by a 5μm filter element.The OR maintain imputting constant operating pressure ...