Carton flow rack is a gravity flow rack system for cartons or cases. The cartons are loaded on one side of the system, they flow down on the roller tracks, and then are picked from on the opposite end.
Pallet flow rack is a FIFO (first in first out) high-density storage system using pallet rack. Gravity flow systems are placed inside of a rack structure. Pallets are loaded in on the front, pallets roll down and are unloaded on the opposite end.