Working Principle of Corrosion-Resistant Submerged Pumps
Corrosion-resistant submerged pumps raise liquid mainly by using atmospheric pressure. Through piston movement, a near-vacuum is created, and the external atmospheric pressure pushes the liquid upward.
According to their working principles, they can be divided into air-pressure pumps, centrifugal pumps, axial-flow pumps, mixed-flow pumps, and screw pumps.
- Air-pressure pumps rely on atmospheric pressure to lift liquid. The piston movement creates an approximate vacuum, and external atmospheric pressure forces the liquid upward. Because this type of pump depends on atmospheric pressure, its suction lift is limited.
- Centrifugal pumps operate on the principle of centrifugal force. The rotation of the impeller blades throws the liquid outward, so their conveying performance depends on factors such as impeller speed and diameter.
- Mixed-flow pumps, also called diagonal-flow pumps, use a mixed-flow impeller. The liquid leaves the impeller in a direction inclined to the pump axis.
- Axial-flow pumps discharge liquid in a direction parallel to the pump axis.