For a relatively small volume like 20 liters, the process is usually quite fast. In most cases, purification (including filtration and moisture removal) can take from about 30 minutes to a couple of hours, depending on the initial condition of the oil.
The main factors are the starting moisture level, the type of contaminants, and the processing method. If vacuum dehydration is used, reaching around 50 ppm is typically achievable within a short cycle, especially when the oil is properly heated.
In practice, GlobeCore units are designed to handle both small and large volumes efficiently, so even small batches can be processed quickly with stable and repeatable results.