... reliable;2. Water power over-current post adopts water-power model of high-efficient energy-saving pump; its efficiency is ... universal highly. Its universal standard parts are shared by several series;5. Its main body adopts type materials and its bearing ... in petroleum refinery, petrochemical, and chemical industry and other fields.Model:50AY60×2B, 250AYS150C50 ,250-inlet diameter (mm)A-first ...