What is the function of the stuffing box in a centrifugal pump?

The stuffing box in a centrifugal pump primarily serves the function of containing the packing material, which is essential for preventing leakage along the shaft where it passes through the pump casing. This area needs to be well sealed to ensure that the fluid being pumped does not escape, which helps maintain system pressure and efficiency. The packing material is typically made of fibers or rubber that help create a tight seal around the shaft.

While it may seem like an ancillary component, the effectiveness of the stuffing box directly impacts the overall performance of the pump. If the packing is inadequate or improperly sealed, it can lead to leaks, loss of efficiency, and potential damage to other parts of the pump. The other options relate to different functions and components not directly associated with the core purpose of the stuffing box in a centrifugal pump.