The CWB type magnetic driven vortex pump, like shielded pumps, uses static seals instead of dynamic seals to ensure that the pump delivers liquid without leakage. Therefore, it is commonly used in industries such as petroleum, chemical, pharmaceutical, and non-ferrous metal smelting to transport toxic, harmful, flammable, explosive, corrosive, and valuable liquids. This pump has the characteristics of low flow rate and high head, and solves the difficulties that were difficult to solve with shielded pumps under high head and low flow conditions before. It also has low power consumption, energy saving, simple and convenient operation and maintenance, small footprint, and low operating and maintenance costs