Impeller: The core component that generates centrifugal force through rotation. According to the structure can be divided into closed, semi-open and open.
Pump casing: Collects the liquid and directs it to the outlet, usually designed as a volute to optimize energy conversion.
Pump shaft: connect motor and impeller to transmit power.
Sealing device: to prevent liquid leakage, common forms include packing seal and mechanical seal.
Bearing: Support the pump shaft to reduce friction.