Atlantic Blowers' AB-1302 Three Phase/Double Stage Regenrative Blower can be used for various pressure or vacuum applications. The AB-1302 produces a maximum flow of 776 CFM. The maximum pressure and vacuum is 87 inH2O and 99 inH2O respectively.The AB-1302 has a power output of 20 HP (15.5 kW) with speeds of either 3000 or 3600 RPM (50/60 Hz dual frequency). The voltage is 220-275Î”/380-480Y with an FLA rating of 52.0Î”/30.0Y. Measuring at a distance of 3 ft. the blower will produce a noise level of 81 dbA. The inlet/outlet connection size is 2.50" female NPT.