Which type of impellers are commonly used in centrifugal pumps?

Centrifugal pumps utilize different types of impellers to achieve varying flow rates and efficiencies, which is why closed, semi-closed, and open impellers are all found in their designs.

Closed impellers are designed with a shroud on both sides, which helps increase efficiency and produces a more uniform flow characteristic. They are typically used in applications requiring high head and efficiency, making them well-suited for many industrial applications and processes.

Semi-closed impellers have a shroud on one side and an open design on the other, offering a balance between the efficiency of closed impellers and the ability to handle solids, often found in applications with slurry or liquid that may contain particulates.

Open impellers, lacking shrouding, are ideal for handling liquids with larger solids and are typically used in applications where the fluid consistency can vary significantly. They tend to have lower efficiency compared to closed designs but excel in situations where the ability to manage solids is more critical than maximizing efficiency.

Thus, the inclusive nature of closed, semi-closed, and open impellers in centrifugal pumps ensures versatility for a wide range of applications in different industries.