Hydraulic Oil Filtration

I had extensive experience with electrostatic devices on injection molding machines and found them totally ineffective. Filters were very expensive and machines kept tripping out. They were supposed to remove microscopic particles yet the inlet strainers that were of strainer material 10 times larger on occasion became restricted. Based on this experience and experience with a good quality bypass oil filter system I would go with the filter, lower price, much less problem and you can replace filters for 1/10 the cost. Contact both manufacturers and do a trial also sample the oil before and after the device and come to a conclusion on facts. My experience any way you want to take it.

Hi

I used to sell elctrostatic oil cleaning units. (Japanese)They do work, however, they only work offline, they are slow and they are expensive. Yes they do remove very small particulate of any type. To warrant the use of one you have to have a special need such as removing lots of sub-micron material. They do not like any moisture eg. Above 50 ppm and you start to get troubles. With the technology that exists today in modern conventional filtration you can clean systems to lower NAS grades / ISO grades without any great problems. The systems on machine tools, construction equipment etc. is all cleaned to a high standard and it is difficult to see what application really needs Electro static cleaning.

Depth filtration only does what conventional filters do, take up more room, is more expensive etc.

The question one needs to ask is do Pall, Parker etc. make these units for hydraulic systems? Answer No. I would not persue the idea unless you are having a really difficult problem with conventional filtration.

Oliver Dunthorne

Hydraulic Engineer