D Series Horizontal Multistage Centrifugal Pumps D, DF, DY series of sub-horizontal single-suction multi-stage centrifugal pumps, using the state ... , corrosive or abrasive-containing medium, etc.. Horizontal multi-stage centrifugal pumps according to their scope of use can be ... and drainage purposes. 2, DF-type: DF Series pumps for distribution does not contain solid particles, the temperature ...