HR DBL type pump is a vertical multi-stage pump with reasonable structure, small footprint, high efficiency, beautiful appearance, light weight and low operating noise. The impeller, guide vane and other parts of the pump are made of stainless steel plate pressed and welded by laser. The surface finish is high, the hydraulic flow loss is small, and the interior is easy to clean, which is very beneficial for conveying pure media. Since the impeller is pressed and welded with stainless steel plates, some small flow and high head pumps that are difficult to achieve with cast impellers can be easily realized.