... , DF, DY series of sub-horizontal single-suction multi-stage centrifugal pumps, using the state recommended hydraulic model of energy-efficient ... , oil, corrosive or abrasive-containing medium, etc.. Horizontal multi-stage centrifugal pumps according to their scope of use can be divided ... Q = 6 ~ 650m3 / h Head H = 24 ~ 650m Horizontal Multistage Centrifugal Pumps