S - Series Single Stage Liquid Ring Vacuum Pump Compare All S-Series S-40-100 Vacuum: 26"HgCFM: 75HP: 5RPM: 1750 SpecificationsGraphDimensions S-40-150 Vacuum: 26"HgCFM: 105HP: 7.5RPM: 1750 SpecificationsGraphDimensions S-65-450 Vacuum: 29"HgCFM: 300HP: 20RPM: 1750 SpecificationsGraphDimensions Single Stage Pumps Monoblock Pumps Double Stage Pumps