DeVilbiss Air Vizor Regulator

This unit is designed to regulate and maintain a nearly constant outlet pressure through the front and rear 1/4” NPT ports while passing unregulated air through the 1/2” NPT ports. The front 1/4” port should be fitted with a gauge (such as a DeVilbiss GA-316, sold separately) to verify pressure at the rear 1/4” port.