1999 Ultra Air Products Refrigerated Air Dryer. Model: UA200 AC. S/N: U-25550. Refrigerant: R22. Voltage: 460/3/60. Maximum working pressure 230 PSIG. By using refrigeration to condense humidity into water in a compressed air system and then eliminating it, the UA200 series air dryer enables pneumatic instruments and controls to work properly, preventing corrosion of internal parts that can result in malfunctions and downtime, thus lowering overall maintenance costs by 15-25%. The end result is improved efficiency, productivity, and overall company profitability. Overall dimensions: 37.3 in. L x 25.2 in. W x 42.1 in. H.(ACN42)(GI).