The lowest pressure point in a pump is located at which part?

The lowest pressure point in a pump is typically found at the center of the impeller. This is because, as fluids move through the pump, they gain kinetic energy due to the rotation of the impeller, which creates a low-pressure area at its center. This phenomenon is a result of the principles of fluid dynamics, particularly Bernoulli's principle, where a reduction in pressure occurs as the fluid velocity increases in the center where the impeller is working to accelerate the fluid.

When the impeller spins, it creates a centrifugal force that pushes the fluid outward, transitioning from the low-pressure center toward the higher-pressure areas at the discharge and casing. This design allows for efficient fluid movement and pressure buildup. In practical scenarios, knowing where the lowest pressure occurs is crucial for understanding cavitation risks and ensuring proper operation of the pump system.

The inlet typically has an atmospheric or suction pressure, while the discharge point reflects the highest pressure produced by the pump. The pump casing will also generally have higher pressure due to the containment of the fluid being pumped. Understanding these dynamics is essential for effective pump operation and maintenance.