... , hydraulic engineering, marine engineering, petrochemical and other industries. 3G Series Screw Pump Applications 1, the medium is a continuous transmission line, no ... , long life. 3G Series Screw Material Lord, from the screw 16MnCrS5, 40Cr, 45,38 CrMoALA Pump body: HT200, QT450-10, ZCuSn10Pl, ZG270-500 Three Screw Pump