The split case pump is also known as a single-stage double-suction centrifugal pump, and its main feature is that the flow rate of the conveying medium is large. The working principle of the split pump operation: The impeller is installed in the pump casing and fastened to the pump shaft, which is directly driven by the motor. There is a liquid suction and suction pipe in the center of the pump casing. The liquid enters the pump through the bottom valve and suction pipe. The liquid discharge port on the pump casing is connected with the discharge pipe. When the speed of the pump is constant, its pressure head and flow rate are related to the diameter of the impeller.