... Iso9001:2000 High effciency energy-saving Low noise Reliable performance.D, DG series multistage pumpD type pump is suitable for conveying ... 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