air pumping machine liquid ring pump can replace Nash,SIHI 1.Pumping air and other non-corrosive gas 2.low noise,low power air pumping machine 2SK series liquid ring vacuum pump 2SK Liquid Ring Vacuum Pump is used for pumping air and other gas that is non-corrosive,unsolvable in water and with no solid powder,so that vacuum and pressure can be obtained in the sealed container.However, a little ...