... Centrifugal Pumps D, DF, DY series of sub-horizontal single-suction multi-stage centrifugal pumps, using the state recommended ... for conveying water, oil, corrosive or abrasive-containing medium, etc.. Horizontal multi-stage centrifugal pumps according to their scope of use ... and so on. 3, DY Model: DY series of pump used for delivery does not contain solid particles, the temperature is ...