What is the purpose of packing in a pump?

The purpose of packing in a pump is primarily to control water leakage along the pump's shaft. Packing is a material, usually made of braided fibers, that is placed around the shaft where it passes through the pump casing. This packing creates a seal that prevents the fluid being pumped from leaking out along the shaft.

Effective sealing is crucial for maintaining operational efficiency and preventing environmental contamination. The right amount of packing can balance the need to prevent leakage while still allowing for some movement of the shaft without excessive friction, which could lead to increased wear.

Other functions, such as enhancing pump capacity, increasing flow rate, or absorbing vibrations, are not directly related to the role of packing in a pump system. While packing does play a part in maintaining optimal pump performance by preventing leaks, it does not inherently increase the capacity or flow rate of the pump itself.