SK series liquid ring type vacuum pump SK-3 SK series liquid ring vacuum pump and compressor is used to suction or compress air and other gas that is non-corrosive, unsolvable in water and with no solid powder, so that vacuum and pressure c... 2BV(SKA) series liquid ring type vacuum pump 2BV(SKA) series vacuum pump is used to pump gas and vapor, which suction pressure reaches 33mbar absolute press