What is the primary purpose of a packing gland in a pump?

The primary purpose of a packing gland in a pump is to seal against leakage. A packing gland is designed to compress packing material that surrounds the pump shaft where it exits the pump casing. This compression creates a seal that prevents the process fluid from leaking out of the pump, which is crucial for maintaining system integrity and preventing environmental contamination.

The effectiveness of the packing gland in controlling leakage sustains operational efficiency and safety in a pumping system. Proper sealing helps maintain the required pressure within the pump, ensuring optimal performance and reducing the risk of equipment wear or failure caused by fluid loss.

The other options do not accurately represent the main function of a packing gland. While it may contribute indirectly to the overall stability of the pump system, its essential role is specifically to prevent leakage.