The series pump is single-suction multi-stage sectional vertical centrifugal pump which is an ideal choice for use in handling water supply in high rising buildings, commercial and residential areas, fire fighting system and district heating system. The pumps feature low noise, long life, easy installation and small space required. The temperature of conveying liquid for the DL series does not exceed 80℃. For DLR series, the temperature is not excess 150℃.