Which method would be effective in minimizing air leaks in the stuffing box?

Installing a lantern ring in the stuffing box is an effective method for minimizing air leaks. A lantern ring is designed to provide a controlled flow of lubricant to the packing material surrounding the shaft. This additional lubrication helps maintain an optimal sealing function by keeping the packing material properly saturated, which reduces the chance of air leaks escaping around the shaft. The lantern ring allows for better distribution of lubricant to the packing and can assist in cooling the packing material, thus enhancing its lifespan and effectiveness.

While increasing packing density might seem beneficial in theory since denser packing could create tighter seals, it can also create excessive friction, leading to increased wear and potentially damaging the shaft or causing overheating. Using a different lubricant could also help with leaks, but it may not address the root cause related to the packing's effectiveness in sealing. Regularly inspecting for wear is important maintenance practice, but it does not directly prevent air leaks; it merely identifies issues that need to be addressed. Therefore, utilizing a lantern ring directly enhances the functionality of the stuffing box in minimizing air leakage.