The function of seal cages, or lantern rings installed in the centrifugal pump stuffing boxes, is to __________.

Correct Answer: Option B — distribute the sealing liquid within the stuffing box

Lantern rings, or seal cages, are positioned within the stuffing box to provide a channel for sealing liquid. This liquid is distributed around the shaft to lubricate the packing, cool the friction surfaces, and create a positive pressure barrier that prevents air from leaking into the pump during suction operations.