What is a Closed Impeller?
An impeller is the key rotating component of a centrifugal pump that accelerates the media being pumped (usually liquid or mixed media with solid content) outward from the center of rotation, transferring energy from the motor that drives the pump to the fluid being pumped.
Closed Impellers have a back and front wall around the vanes, giving them maximum structural strength and optimal efficiency when moving high volumes of liquid media. These types of impellers have a more complex design and structure to manufacture due to their reliance on close-clearance wear rings to reduce axial loads.
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Application & Industries
Closed Impellers are used primarily in larger pumps moving clear liquids, but can be used in applications that handle suspended-solid services. Typically closed impellers are used in explosive and volatile liquids handling. Closed impellers minimize maintenance needs and adjustments as typically required with open impeller pumps.
These impellers are utilized in pumps serving a wide range of applications for multiple industries such as:
- Food processing
- Water
- Wastewater handling
- Agriculture
- Nuclear Energy
- Military
- Oil & Gas
- Petro-Chemical
- Chemical processing
Case Studies, News, & Resources
- SF&E Improves Castability and Production Timeline for Complex Impeller
- SF&E Pours Largest Nuclear Impeller in its History
- For Fristam Pumps, Mutual Trust is Key to 20-Year SF&E Partnership
- Oil Refinery Partners with Turbonetics and SF&E on Illium PD Double Suction Casing
- Core Parts: Anatomy of a Centrifugal Pump
- Pump Impellers
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