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