Atlantic Blowers' AB-500 Three Phase/Single Stage Regenerative Blower can be used for various pressure or vacuum applications. The AB-500 produces a maximum flow of 230 CFM. The maximum pressure and vacuum is 88 inH2O and 88 inH2O respectively.The AB-500 has a power output of 3.5 HP (2.55 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 10.7Î”/6.2Y. Measuring at a distance of 3 ft. the blower will produce a noise level of 70 dbA. The inlet/outlet connection size is 2.00" female NPT.