Liquid Ring Vacuum Pump Includes Motor No Number of Stages 1 Motor Type Bare-Shaft Free Air Flow Rate 550 cfm Maximum Vacuum 29 in Hg Output Power 40 hp Housing Material 316 Stainless Steel Impeller Material 316 Stainless Steel Inlet Size 4 in Inlet Type Flange Outlet Size 4 in Outlet Type RF Flange Maximum Speed 1 750 RPM