To maintain the performance of oil for a long time, to improve the economic performance or the effective utilization ratio in the use of an oil material, to secure the supply quantity of the oil per unit time at the time of reutilization to facilitate the maintenance of a device and to reduce the quantity of the generation of waste oil and the like.
The device is provided with a treating means for removing solid impurities 92 in the oil 91 by treating the used oil 91 generated in an oil use part 12 with a solid-liquid separation machine 31, a treating means for removing residual impurities 92 in the oil 91 by passing the oil 91, in which the solid impurity is removed, through filter vessels 52-54 of a filter vessel structure 51, a treating means (circulation filtration line 71) for circulating and filtering the oil in the filtering vessel 54 of the final stage and a refluxing means (reflux pipe line 81) for returning the oil 91 in the filtering vessel 54 toward the oil use part 12 from the filtering vessel 54 of the final stage.
ONUKI GISABURO
IMAZATO HISANOBU
TAKASU MASUKI
MISUZU TECHNO KK
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