Views:8 Author:Site Editor Publish Time: 2015-01-25 Origin:Site
After long time using,the insulation oil would contains large number of particles,in order to restore the oil quality,users must purify the used insulation oil.
Purification can be one of the following methods:
(1) Filtration: can remove fiber,black carbon, metal, sludge and other solids
(2) Heating: separation of dissolved and free water
(3) Vacuum pumping: remove dissolved air and other gases