... Iso9001:2000 High effciency energy-saving Low noise Reliable performance.D, DG series multistage pumpD type pump is suitable for conveying water ... for mine drainage and factory building, city water supply, etc.D series multistage pump Flow: 6.3 - 450m³/h, Head: 17.5 ... - 670m, Operating temperature < 80 Degrees Celsius D series single suction multistage centrifugal pump