Abstract: Device for cooling a granular product provided with a bunker with an intake for the material to be cooled at the top side of said bunker and a grate construction located near the bottom side of said bunker, with a fixed grate and a movable grate, movable to and fro in action, whereby the movable grate has been arranged under the fixed grate, while under the movable grate a third grate has been provided, which during operation is displaceable and adjustable in several positions.