Oil heating is used for treatment of oil in degassing, drying and regeneration machines to accelerate the process. Dehydration is based on the difference of water and oil boiling points. Since water boiling point is lower, heating can evaporate that water from the oil before the boiling point of oil is achieved.
Transformer Oil heating Machine are also used when washing a transformer. There are always contaminants remaining in the transformer after draining old oil. They are removed by hot oil. The temperature and oil flow wash the impurities from the internal surfaces of the transformer, and the transformer can be safely filled with new oil.