DL series pumps are vertical, single-suction, multi-stage, sectional centrifugal pumps for the transport of clear water and physicochemical properties similar to water. Compared with horizontal multi-stage pump, DL-type pump has the advantages of stable operation, low vibration, low noise, long service life, compact structure, small floor area and easy installation because of its small deflection. LG series single suction segmental multi-stage vertical centrifugal pumps, for the transport of clear water or similar physical and chemical properties of water liquids, mainly used for high-rise building water supply, but also for urban, factory and mine water supply and drainage. The flow rate is 4.4m3/h-200m3/h and the lift is 21m-133m.