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2026-07-10
REXON continuously develops advanced transformer oil purification solutions for power utilities, transformer manufacturers, and maintenance service providers. Our ZYD-10000 Double-Stage Vacuum Transformer Oil Purifier with Regeneration System integrates high-vacuum dehydration, degassing, multi-stage precision filtration, thermostatic heating, and oil regeneration into a complete process, helping recover transformer oil quality and guarantee the transformer's reliability.
Here is the oil flow chart and treatment process for you to understand this equipment better. Please review:
1. Oil Intake & Pre-Treatment
Contaminated transformer oil is first pumped into the purifier and passes through a 50 μm coarse filter, which removes large solid contaminants and protects the downstream components. The oil is then heated to an optimal temperature of 60°C, reducing its viscosity and improving the efficiency of moisture evaporation and gas separation during the vacuum treatment.
2. Double-Stage High Vacuum Dehydration & Degassing
The core of our REXON ZYD Series is its double-stage high vacuum system, which consists of a rotary vacuum pump and a Roots vacuum booster pump. Together, they generate a stable high-vacuum environment of -0.08 to -0.099 MPa (approximately 200 to 10 mbar absolute pressure) inside the vacuum chamber. And the ultimate vacuum value is 5Pa(0.5Mbar).
Under this high vacuum, the transformer oil is dispersed into a thin oil film, significantly increasing the evaporation surface area. Free water, emulsified water, dissolved moisture, and dissolved gases rapidly vaporize at low temperatures and are continuously extracted from the oil. This deep dehydration and degassing process effectively restores the insulating properties of transformer oil while avoiding thermal damage to the oil.
3. Oil Regeneration
After vacuum treatment, the oil enters the regeneration tower filled with high-performance adsorbent materials. The regeneration process effectively removes:
Oxidation products
Oil sludge and varnish
Carbon particles
Acidic compounds
Colloidal contaminants
Oil discoloration
This restores the oil's chemical stability, reduces the acid value, improves oil appearance, and significantly extends the service life of the transformer oil.
4. Three-Stage Precision Filtration
The regenerated oil then passes through our other two-stage filtration system, ensuring outstanding oil cleanliness.
Secondary Filtration (5 μm): Removes medium-sized contaminants remaining after coarse filtration.
Final Precision Filtration (1 μm): Eliminates ultra-fine particles, ensuring excellent oil cleanliness that meets demanding transformer maintenance standards.
5. Purified Oil Output
After completing the purification process, the treated transformer oil is delivered back to the transformer or storage tank.
With our REXON ZYD-10000, the treated oil can typically achieve:
Moisture content ≤ 3 ppm
Gas content ≤ 0.1%
Dielectric strength ≥ 75 ~85 kV (BDV)
Oil cleanliness up to NAS Class 5 or better
These results greatly improve transformer insulation performance, reduce electrical discharge risks, extend transformer service life, and lower maintenance costs.
6. Intelligent Monitoring & Protection
To ensure safe and reliable operation, our REXON ZYD-10000 is equipped with an intelligent PLC control system with a 10 inches big size colorful touch screen that continuously monitors vacuum level, temperature, pressure, flow rate, and other key operating parameters.
The system provides automatic alarms and protection against overheating, overload, insufficient vacuum, and filter blockage. Optional online monitoring devices—including an online moisture analyzer, particle counter, flow meter, and automatic additive dosing system- are also available to further enhance operational efficiency and monitoring capability.
At REXON, we are dedicated to delivering professional transformer oil filtration, oil purification and oil regeneration solutions that help customers maximize transformer reliability, reduce maintenance costs, and extend the service life of both insulating oil and critical power equipment.
10 July 2026
REXON Team
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