The component that surrounds the impeller and collects the discharged water is called the __________.

The component that surrounds the impeller and collects the discharged water is called the __________.

• A. Diffuser
• B. Impeller
• C. Casing
• D. Volute

Answer: (D)

The volute is the part of a centrifugal pump that surrounds the impeller. Its spiral-shaped casing encloses the impeller and collects the water as it leaves, directing it into the discharge pipe while converting some of the flow’s velocity into pressure. This shaping and guiding of the discharge flow is what helps build the pump’s head and produce a steady output. The diffuser is a stationary vane passage around the impeller that further slows the water to raise pressure, but the primary role of collecting and directing the discharged water into the discharge line is the volute. The casing is the overall pump housing, and the impeller is the rotating component that imparts energy to the fluid.

The volute is the part of a centrifugal pump that surrounds the impeller. Its spiral-shaped casing encloses the impeller and collects the water as it leaves, directing it into the discharge pipe while converting some of the flow’s velocity into pressure. This shaping and guiding of the discharge flow is what helps build the pump’s head and produce a steady output.

The diffuser is a stationary vane passage around the impeller that further slows the water to raise pressure, but the primary role of collecting and directing the discharged water into the discharge line is the volute. The casing is the overall pump housing, and the impeller is the rotating component that imparts energy to the fluid.