Vertical Multistage Pump

A vertical multistage pump consists of two or more impellers mounted on either the same shaft or different shafts. The pump casing serves as the inlet for the fluid, which then enters the impeller’s eye. Mechanical means, such as an electric motor or engine, drive and rotate the impeller.

The rotation of the impeller generates centrifugal force, propelling the fluid along the impeller vanes and pushing it towards the outer tip. Subsequently, the fluid enters the stage diffuser, which acts as a cutwater, directing the fluid to the suction eye of the next impeller. This process repeats for each impeller stage until the fluid passes through all stages. Finally, the fluid exits the pump casing through a final diffuser and into the pump discharge.

As the fluid passes through each stage, the discharge pressure increases.

Vertical multistage pumps find applications in various industries, such as industrial, commercial, medical, high-rise buildings, municipal water supply, and agricultural irrigation. They are particularly useful when higher pressures are required, surpassing what single-stage pumps of the same size can achieve.

There are different types of vertical multistage pumps, including centrifugal pumps and renewable options.

Centrifugal pumps utilize rotational kinetic energy to convert it into hydrodynamic energy, facilitating fluid transportation. The fluid enters the pump impeller near the rotating axis and gains acceleration from the impeller’s action, flowing outward into a diffuser or volute chamber (casing) before exiting.

Common uses of centrifugal pumps encompass water and sewage systems, agriculture, petroleum and petrochemical industries. Their advantages lie in their high flow rate capabilities, compatibility with abrasive solutions, mixing potential, and relatively simple engineering.”