Positive Displacement Blower Configuration V-BHC Inlet Size 3 in Inlet Type NPT Inlet Gender Female Outlet Size 3 in Outlet Type NPT Outlet Gender Female Displacement 2.72 cu in/rev Maximum Operating Pressure 15 psi Maximum Vacuum 16 in Hg Maximum Speed 2 350 RPM Minimum Speed 891 RPM Maximum Air Flow 477 cfm Minimum Air Flow 152 cfm Maximum Power Required 37.9 hp Minimum Power Required 3.7 hp Shaft Diameter 1 3/8 in