DL series pump is a vertical, single-suction multistage and segmented centrifugal pump, which can supply water below 80 ℃ and physical and chemical properties similar to water, suitable for urban high-rise buildings, factory life and fire water supply. DLR-type hot water pump medium temperature below 150 ℃, for central heating system hot water cycle. Compared with horizontal multistage pumps, DL type and DLR type pumps have stable operation, low noise, long vibration life and long service life due to their small degree of windings. In addition, they have the advantages of compact structure, Small size, easy installation, and according to the requirements of use, the relative position of the pump import and export can be turned for four different directions.