ZYD transformer oil purifier is mainly used for high vacum and low temperature of oil to achieve required results. It uses two stages vacuum system including vacuum pump and booster pump, which can effectively make used or old transformer oil achive strandard value as same as new transformer oil.ZYD transformer oil purifier equips three grades filtration system including primary filtration,sencond filtration and fine filtration.After filtration, the size of particles can reach to 1 micron.