Which assembly holds the lantern ring and packing?

Which assembly holds the lantern ring and packing?

• A. Lantern ring
• B. Impeller
• C. Gate valve
• D. Stuffing box

Answer: (D)

The main idea here is that the stuffing box is the enclosure that houses both the lantern ring and the packing around the shaft to create a seal. The lantern ring is a hollow spacer placed between packing rings inside the stuffing box, and it provides a path for lubrication or flushing fluid to reach the packing area, helping to keep the seal cool and effective. The packing itself is the material that directly tightens around the shaft when the gland is tightened, creating the barrier to leakage. The other components listed don’t serve as the enclosure for both of these items. The impeller is the rotating part that moves fluid inside the pump, not a packing enclosure. A gate valve is a shutoff device used to start or stop flow, unrelated to sealing around a shaft. The lantern ring is a component that resides inside the stuffing box, not the assembly that holds both it and the packing together.

The main idea here is that the stuffing box is the enclosure that houses both the lantern ring and the packing around the shaft to create a seal. The lantern ring is a hollow spacer placed between packing rings inside the stuffing box, and it provides a path for lubrication or flushing fluid to reach the packing area, helping to keep the seal cool and effective. The packing itself is the material that directly tightens around the shaft when the gland is tightened, creating the barrier to leakage.

The other components listed don’t serve as the enclosure for both of these items. The impeller is the rotating part that moves fluid inside the pump, not a packing enclosure. A gate valve is a shutoff device used to start or stop flow, unrelated to sealing around a shaft. The lantern ring is a component that resides inside the stuffing box, not the assembly that holds both it and the packing together.