XBD-L-type vertical suction sub-fire multi-stage pumping systems for non-delivery of water and solid particles of similar physical and chemical properties of liquid water use. Fire mainly used for pressurized water pipeline system, but also to industrial and urban water supply and drainage, high-rise building pressurized water, and transport from the water, heating, bathrooms, boilers and well-being of pressurized water cycle, air conditioning and refrigeration equipment for water systems and other occasions.