Liquid Ring Vacuum Pump Includes Motor No Number of Stages 1 Motor Type Monoblock Free Air Flow Rate 300 cfm Maximum Vacuum 29 in Hg Output Power 20 hp Housing Material Cast Iron Impeller Material 316 Stainless Steel Inlet Size 2 1/2 in Inlet Type Flange Outlet Size 2 1/2 in Outlet Type RF Flange Maximum Speed 1 750 RPM