... , 50, 60 bearing body, which is more reliable;2. Water power over-current post adopts water-power model of high-efficient energy ... oil pump;3. AY-type oil pump has same structural model, installation size and scope of performance parameter with old Y ... in petroleum refinery, petrochemical, and chemical industry and other fields.Model:50AY60×2B, 250AYS150C50 ,250-inlet diameter (mm)A-first reconstruction ...