... bearing body, which is more reliable;2. Water power over-current post adopts water-power model of high-efficient energy-saving pump; its ... oil pump, S-first impeller double-suction,,material code of over-current partsI-class HT12547,-class ZG25,-class ZG1Cr13Ni.60, 150 ... its medium is water temperature above 66 and hydrocarbon temperature over 150.The impeller is mono-block cast and static balancing ...