What does upper distributor mean in practice?
The upper basket distributes the flow at the entrance to the bed and prevents grains from being carried out to the head during parts of the cycle.
When does it matter?
Damaged gaps may allow medium into the installation or disturb the uniformity of the bed surface.
Which solutions are related to it?
When replacing the medium, check the cracks, the width of the gaps and the compliance of the connection with the central pipe and the head.