What is a lantern ring in a pump packing gland?

A lantern ring is specifically designed to enhance the distribution of seal water in a packing gland of a pump. It serves as a spacer ring that allows seal water—or lubrication—to be evenly distributed to the packing material, which helps maintain an effective seal and prolongs the life of the packing. By ensuring that the packing is adequately lubricated, it minimizes friction and heat generation, which can lead to premature wear or failure of the packing material.

The other options, while related to various components and functions of a pump, do not accurately describe the function of a lantern ring. Understanding the role of the lantern ring is vital for maintaining proper pump operation and ensuring that the sealing elements are functioning effectively, which directly impacts the efficiency and longevity of the pump system.