... Conservation : low noise ; leak-tightness; reasonable selection of materials;easy maintenance, manufacturer AY oil pumpAY-type oil pump ... centrifugal oil pump, S-first impeller double-suction,,material code of over-current partsI-class HT12547,-class ZG25,-class ZG1Cr13Ni. ... is radially split type. It is suitable to the conveying of high-temperature, high-pressure, flammable, explosive, noxious liquid ...