... be divided into the following types: 1, D Type: D Series pumps for distribution does not contain solid particles, the temperature ... urban water supply and drainage purposes. 2, DF-type: DF Series pumps for distribution does not contain solid particles, the temperature ... cSt oils and petroleum products. 4, MD (or the DM-type): MD (or DM) series for the delivery particle concentration ≤ 1.5%, particle ...