In pump packing, which component functions as a spacer between the rings?

In pump packing, which component functions as a spacer between the rings?

• A. Gland
• B. Lantern ring
• C. O-ring
• D. Packing ring

Answer: (B)

Lantern ring serves as a spacer between the packing rings. Its hollow design sits between packing rings in the stuffing box, creating a deliberate gap that keeps the rings from binding together and separates them under gland compression. This space also provides a path for lubricant or flushing fluid to reach the shaft area, helping to cool and lubricate the packing and reduce wear. The gland is the housing that compresses the packing; an O-ring is a separate seal used elsewhere, and a packing ring is the sealing element itself, not the spacer.

Lantern ring serves as a spacer between the packing rings. Its hollow design sits between packing rings in the stuffing box, creating a deliberate gap that keeps the rings from binding together and separates them under gland compression. This space also provides a path for lubricant or flushing fluid to reach the shaft area, helping to cool and lubricate the packing and reduce wear. The gland is the housing that compresses the packing; an O-ring is a separate seal used elsewhere, and a packing ring is the sealing element itself, not the spacer.