... reliable;2. Water power over-current post adopts water-power model of high-efficient energy-saving pump; its efficiency is 58 ... in petroleum refinery, petrochemical, and chemical industry and other fields.Model:50AY60×2B, 250AYS150C50 ,250-inlet diameter (mm)A-first reconstruction ... HT12547,-class ZG25,-class ZG1Cr13Ni.60, 150-single-stage lift (m) 2-stageB,the orders of C-impeller cutting times are ...