(1) Visual inspection: The normal visual acuity limit of people is generally about 40μm. Therefore, when the particle size of the dirt impurities in the oil is greater than 40 μm, the human eye can see it. When the dirt can be directly observed by visual inspection, the working oil is already dirty and must be replaced.
(4) Heating test: To find out whether the oil contains moisture, you can heat an iron plate to about 250 ℃, drop a drop of use oil on the iron plate, if there is a cracking sound, it contains moisture. Oil without water burns silently.
(5) Function test: Normally we have many methods to test the basic functions of lubricating oils. For example, the transformer oil, we can do the oil breakdown voltage test, if the breakdown voltage is lower than the minimum requirements, which means we need to purify transformer oil. We can also do the water content test, if higher than standards, we should do vacuum dehydration process. As well as particles test of lubricating oils, etc.
We PureTech have various of Oil Purification Machines which are designed for different oils and different requirements, please feel free to consult us if you have oil contamination problem, our experienced oil engineers will propose the most suitable solutions for you.
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