... gas and other medium in petroleum refinery, petrochemical, and chemical industry and other fields.Model:50AY60×2B, 250AYS150C50 ,250 ... HT12547,-class ZG25,-class ZG1Cr13Ni.60, 150-single-stage lift (m) 2-stageB,the orders of C-impeller cutting times ... has six models: single-stage single-suction cantilever type, double-stage single-suction cantilever type, single-stage double-suction cantilever type, ...