What is the difference between a vacuum oil filter and a plate-type oil filter? (Urgent use)

Vacuum oil filters are primarily used to remove trace amounts of water from oil, while plate-type oil filters are used to eliminate solid impurities in lubricating oils

Plate-type oil filters are now less commonly used; precision oil filters (portable, with filter elements) are more convenient； Vacuum oil filters are used when oil contains water.

When there are many mechanical impurities in the lubricating oil, it is much more economical to use a plate-type oil filter. As for whether a plate-type filter is necessary, my understanding is that it depends on the particle size requirements for the oil you use in circulation; if the filtration precision needs to be below 20 UM, a plate-type oil filter should be used. If a higher level of precision is required, then a precision oil filter is necessary.

Comparison of several main oil filtration methods 1. Mechanical filtration devices: · Filter impurities by means of the intercepting action of the filtering medium; particles quickly clog the pores of the filter screen. ·High filter element consumption and high operating costs ； It is ineffective against fine particulate matter. ·Back pressure is generated ； It is difficult to achieve a stable oil filtration effect with a cleanliness level of NAS 6–8. ·Oil change and waste oil disposal are required frequently. 2. Centrifugal filtration device · It can remove free water and large impurities, but it is ineffective against emulsified oils or fine particles. ·Suspensions such as paint film cannot be removed ； It cannot effectively deal with bacteria. ·High-viscosity oils need to be heated to above 84.5°C to accelerate their aging. ·The water separation performance is poor, which may lead to further emulsification of the oil. ·Frequent system cleaning is required ； The system requires high installation standards and involves a large amount of work. ·High equipment costs do not solve the problem of oil emulsification, and many power plants and steel mills have stopped using centrifuges ； 3. Working principle of the vacuum oil filter: · Water is separated using vacuum distillation, while impurities are removed through mechanical filtration. ·As mentioned earlier, mechanical filtration systems have high costs associated with the filter elements, and their cleanliness does not meet the required standards. ·Vacuum separation of moisture is only suitable for removing trace amounts of water from oils, such as in the treatment of transformer oil. ·Vacuum dehydration is not suitable for turbine oils, lubricating oils, or oil film bearing oils with high water content. ·Using a vacuum oil filter to treat water-containing emulsified oils is inefficient, and dehydration is slow at low temperatures ； Foam is produced at higher temperatures; the dehydration process remains slow, and it is difficult to operate. ·For units with severe leakage, the amount of water separated by vacuum is less than the amount of water generated by the oil system; using a vacuum oil filter to deal with this situation only results in increased electricity consumption and waste of human resources, without solving the problem. Plate filter presses are suitable for the closed-filtering of liquids with a viscosity below 50% and a low content of solids, in order to meet the requirements of fine or semi-fine filtration such as purification, sterilization, and clarification ； By directly using microporous filter membranes, sterile filtration can be achieved without the need for a microporous membrane filter. Reference for plate-type filter presses: http://www.hudong.com/wiki/%E6%9D%BF%E5%BC%8F%E5%8E%8B%E6%BB%A4%E6%9C%BA

I only know that in the non-ferrous metal rolling industry, plate filters are commonly used; the filter membrane is made of non-woven fabric. Oil, diatomite, and activated clay are mixed together and then pumped onto the non-woven fabric, where filtration under pressure takes place, allowing mechanical impurities to be effectively removed.

One dedicated to filtering water from oil, one dedicated to filtering impurities from oil

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