Which component provides a water seal connection in a pump packing?

• A. lantern rings
• B. packing glands
• C. o-rings
• D. grommets

Answer: (A)

Lantern rings create the water seal in a packing arrangement by sitting between packing rings inside the packing gland and providing passages for cooling or sealing water to reach the area around the shaft. This water contact helps form a thin barrier that reduces leakage and cools the packing as the shaft turns. The packing gland’s job is to compress the packing material; it doesn’t supply water. O-rings and grommets serve other sealing or protective roles and don’t establish the water-sealing path used in pump packing.