Regenerative Blower Phase Three Output Power 3.5 hp Maximum Operating Pressure 80 in Hg Maximum Flow Rate 220 cfm Maximum Vacuum 80 in Hg Voltage 190 to 220/380 to 415V 208 to 230/460V Inlet Size 2 in Inlet Type NPT Inlet Gender Female Outlet Size 2 in Outlet Type NPT Outlet Gender Female Frequency 50 Hz 60 Hz Housing Material Aluminum