Arrow Pneumatics Refrigerated Air Dryer. Model: 3514, S/N:11703. Refrigerant: R-22. Compressor: 3 hp, 230 V, 3 phase, 60 Hz, 15.1RLA, 72 LRA, KW input: 3.75. Inlet: 3 in. NPT. Outlet: 3 in NPT. Flow capacity: 500 SCFM. Overall dimensions: 45 in. L x 30 in. W x 56-1/2 in. H. To avoid unnecessary maintenance or breakdowns your compressed air must be dry and clean. Air dryers can help minimize the amount of moisture that is generated from your compressed air system. Arrow Pneumatics refrigerant air dryers are energy efficient, with air-to-air and refrigerant-to-air heat exchangers to reduce energy consumption.