D Series Horizontal Multistage Centrifugal Pumps D, DF, DY series of sub-horizontal single-suction multi-stage centrifugal pumps, using the ... and increase the cooling system for conveying water, oil, corrosive or abrasive-containing medium, etc.. Horizontal multi-stage centrifugal pumps ... supply and drainage purposes. 2, DF-type: DF Series pumps for distribution does not contain solid particles, the ...