Atlantic Blowers' AB-1802 Three Phase/Double Stage Regenerative Blower can be used for various pressure or vacuum applications. The AB-1802 produces a maximum flow of 812 CFM. The maximum pressure and vacuum is 141 inH2O and 161 inH2O respectively.The AB-1802 has a power output of 30 HP (22 kW) with speeds of either 3000 or 3600 RPM (50/60 Hz dual frequency). The voltage is 220-275Δ/380-480Y with an FLA rating of 76.0Δ/44.0Y. Measuring at a distance of 3 ft. the blower will produce a noise level of 84 dbA. The inlet/outlet connection size is 4.00" female NPT.