... Centrifugal Pumps D, DF, DY series of sub-horizontal single-suction multi-stage centrifugal pumps, using the state ... and increase the cooling system for conveying water, oil, corrosive or abrasive-containing medium, etc.. Horizontal multi-stage centrifugal pumps ... physical and chemical properties of liquid fresh water. Suitable for mines, factories and urban water supply and drainage purposes. ...