1. Vacuum dehydration and degassing;
2. High filter accuracy, filter 99.8% impurities bigger than 1 microns;
3. Reduce acidity of transformer oil;
4. Change dark color of transformer oil to clear;
5. Improve oil dielectric strength (BDV) value upto 75kV;
6. Vacuum oil filling;
7. Vacuum pumping for transformer;
8. Hot oil circulation for transformer;