ZANYO offers high-performance double stage vacuum transformer oil purifier. As a direct manufacturer, we support OEM customization to match your specific requirements. Both online and offline models are available. Our solutions are cost-effective and competitively priced, with fast delivery to ensure your deadlines are met while maintaining high quality.
Zanyo Double Stage Transformer Oil Purifier Series
Double stage vacuum transformer oil purifier adopts a high vacuum system and high-precision filtration system, combined with a specially designed structure for vacuum pumping, vacuum drying, and vacuum oil filling. It has multiple functions including dehydration, degasification, filtration, vacuum pumping, vacuum drying, and vacuum oil filling.
The high vacuum system contains two stages: the pre-stage vacuum system (vacuum pump) and the second-stage vacuum system (roots vacuum pump). These double stages ensure the machine achieves a high vacuum degree. The precision system adopts a multi-grade oil filtration system, with fine filtration reaching 0.5 to 1 micrometer.
Double Stage Vacuum Transformer Oil Purifier is designed for purifying new or aged transformer oil, cable oil, super high-voltage transformer oil, switch oil, capacitor oil, and various insulating oils.
It works both online and offline, and is widely used for purifying insulation oil in all kinds of large power equipment, including transformers above 110KV up to 500KV.
The Purified Oil Can Be Achieve As Following:
| High Vacuum Degree | 0.05mbar |
| Fine Filter | 0.5 to 1 Micrometer |
| Moisture Content | Less Than 3 Ppm |
| Gas Content | Less Than 0.05% |
| The Dielectric Strength | Above Than 75kV |
- Deep Cleaning Power
Handles heavily contaminated oil with high water and gas content, restoring insulation strength and extending transformer life. - Fast Turnaround
High processing speed ensures quick recovery during emergencies, minimizing costly downtime. - High-Altitude Ready
Maintains strong vacuum performance even in low-pressure environments where single-stage units struggle. - Comprehensive Treatment
Supports not only oil purification but also vacuum drying of transformers, improving overall system reliability. - Future-Proof Investment
Delivers flexibility and capacity to meet both current needs and future challenges.
After the transformers are running for a long time, because of factors such as pressure, air, temperature, and aging, etc, there are some gas, moisture and other impurities will be in the dielectric insulating oil. These factors affect the insulation function and heat dissipation properties of the transformer oil. Therefore, transformer oil filtering must be adopted.
Transformer oil filtering machine main purposes are removing dissolved gases and moisture, solid particulate, contamination, etc. After the transformer oil dehydrator, transformer oil degasification, transformer oil filtration processes, the dissolved gases and moisture, solid particulate, and contamination can be completely removed.
Other steps include vacuum pumping, vacuum drying, and vacuum oil filling.
Considering the injection of 100T oil into a single transformer, 8 to 9 oil tanks with capacity of 15-20t should be prepared.
The oil tanks arriving at the site are usually arranged near the transformer in two evenly arranged rows, The outlet of the oil tank is arranged in a straight line toward the inside. The outlet of each oil tank is equipped with a control valve to control the inflow and outflow of oil. The outlet of the control valve is connected with a T-shaped three-way interface, and the interfaces of all oil tanks are connected together through the tubing.
Leave an empty oil tank to be used for the conversion of transformer oil when filtering oil.
In this way, transformer oil can be filtered in any oil tank as needed. So as to avoid the tedious task of frequently dismantling pipes
ZYD Series Transformer Double Stage Vacuum Transformer Oil Purifier System is designed for purifying used or aged transformer oil, super high -voltage transformer oil, switchgear oil and different insulating oils. It is also used for purifying insulation oil in all kinds of large power equipments, which are above 110KV, and 500 meters altitude.
This transformer oil purification system can remove free water, soluble water, acid , gas, small and big size particles, increasing the pressure force and quality of oil, improving the breakdown voltage value, making the transformers and electric device running safely.
How Does a Double Stage Oil Purifier Work
Offline vs Online Purification Machine Model
| Feature | Offline Transfermor Oil Purification Machine | Online Transfermor Oil Purification Machine |
|---|---|---|
| Operation Mode | Requires system shutdown | Works while equipment is running |
| Maintenance Frequency | Periodic cleaning | Continuous purification |
| Ideal Use | Small-to-medium operations, scheduled maintenance | High-demand industrial environments, minimal downtime |
| Oil Quality Control | High after each offline cycle | Maintains consistent oil quality in real time |
| Cost | Lower initial investment | Higher initial investment |
| Flexibility | Can be moved between systems | Typically fixed installation |
| Downtime Impact | Requires downtime | No downtime needed |
| Efficiency | Effective during operation, but limited to offline periods | Continuous impurity and moisture removal |
| Applications | Gear oils, transformer oils, hydraulic oils during maintenance | Transformer oils, turbine oils, hydraulic oils in continuous operation |
Why Choose Zanyo
| Stable Running | Easy to operate | High Quality |
| Professional Technical Service | Strict Quality Control | Affordable Price |








