PURPOSE: A self-priming turbo pump is provided to easily adjust flow rate and pressure according to the use of the pump by controlling the number of booster cases and impellers. CONSTITUTION: A self-priming turbo pump comprises a casing(200) and an impeller(220). The casing comprises an intake pipe(211) and a discharge pipe(231) to allow fluid to flow in and out. The impeller is installed in the casing and rotated to force the fluid flowing in the casing through the intake pipe to be discharged. The casing is composed of an intake side casing(210) and a discharge side casing(230) which have an identical shape.
