XBD-DQD vertical multistage centrifugal pumps are newly developed products to cater for the water supply and discharge in high-rise constructions to the standard of National Fire Bureau GB6245-98.Because of the use of the advanced energy-saving hydraulic model to feature high efficiency and wide performance range, they may better meet the operation requirements of the users. Besides, they are structured vertical or segmental to feature safe and stable operation, long service life, small occupation space and easy installation and maintenance.