Silo tanks for milk reception belong to the storage category and have been described under "Collection and reception of milk”. They vary in size from 25 000 to about 150 000 liters and the wetted surfaces are of stainless steel. They are often placed outdoors to save on building costs. In these cases the tanks are insulated.
Intermediate storage tanks
These tanks are used to store a product for a short time before it continues along the line. They are used for buffer storage, to level out variations in flow. After heat treatment and cooling, the milk is pumped to a buffer tank, and from there to filling. If filling is interrupted, the processed milk is buffered in the tank until operation can be resumed. Similarly, milk from this tank can be used during a temporary processing stoppage.