What is advised regarding the tightening of packing glands in a water system?

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The recommended practice regarding the tightening of packing glands in a water system is to avoid tightening them to the point of completely eliminating leakage. Packing glands are designed to control leakage while still allowing for some moisture to escape. This slight leakage can be beneficial as it helps ensure that the packing stays lubricated, which reduces wear on both the packing material and the shaft or valve that it is sealing against.

When packing glands are tightened excessively to stop all leakage, it can cause overheating, increased friction, and premature wear. Additionally, too much tightening can lead to damage of the packing material itself, creating a more significant problem than the initial leak. Therefore, it is essential to maintain a balance where the packing is adequately tightened to limit leakage without completely stopping it. This approach not only preserves the packing but also ensures the efficient operation of the system.

Regular monitoring is also necessary to check the condition of the packing and to adjust as needed without completely eliminating the leakage, which is why some options mentioned do not align with best practices. For instance, suggesting replacements at fixed intervals without considering the actual wear and condition overlooks the importance of maintaining operational efficiency.

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