Detail Images of Transformer Oil Vacuum Purifier
Vacuum Oil Purifier Features: Core Advantages and Intelligent Design
- Advanced Filtration Technology in the Vacuum Oil Purifier: Duplex 3D Stereo-Evaporation Technology; Multi-Stage Precision Filtration;Coalescing Technology;
- Intelligent Control Systems for the Vacuum Oil Purifier: High precision PLC-Based Fully Automatic Operation;
Double-Infrared Liquid Level Sensor;
Interlocked Protection System;
Digital Temperature Control; - Design Advantages of the Vacuum Oil Purifier: Online Operation;
Mobile Configuration;
Weather-Proof Options;
Low Maintenance;
Low Noise Operation;
——Transformer Oil Vacuum Purifier Overview: Why It Matters for Power Equipment
Transformer oil (insulating oil) degrades over time due to oxidation, moisture ingress, and particulate contamination. Water is the primary accelerator of oil oxidation—when water content doubles, the oxidation rate doubles. Excessive moisture decreases the dielectric breakdown voltage of oil, compromises solid insulation, and creates conditions for partial discharges that can lead to catastrophic transformer failure.
The solution: A transformer oil vacuum purifier (also called a vacuum oil filter, dehydrator, or degassing unit) removes free, emulsified, and dissolved water, gases, and solid particles from insulating oil, restoring its dielectric strength to meet or exceed OEM specifications.
These machines are widely used in:
- Power plants and substations
- Transformer manufacturing facilities
- Electrical utilities and transmission companies
- Industrial and mining enterprises
- Railway and transportation infrastructure
——How Does a Vacuum Oil Purifier Work? Complete Working Principle
The operating principle of a vacuum oil purifier is based on the difference in boiling points between water and oil under vacuum conditions. In a vacuum environment, water boils at temperatures far below 100°C, allowing efficient separation without degrading the oil.
5-Step Vacuum Oil Purification Process
——Transformer Oil Vacuum Purifier Specifications: Key Technical Parameters
Typical Performance Results After Purification with a Vacuum Oil Purifier
| Parameter | Typical Value | Industry Standard |
|---|---|---|
| Water Content | ≤ 3–5 ppm | ASTM D1533 |
| Gas Content | ≤ 0.1% (vol) | ASTM D2945 |
| Breakdown Voltage | ≥ 65–75 kV | ASTM D1816 / IEC 60156 |
| Filtration Precision | 1–5 micron | — |
| Impurity Degree | ≤ NAS 1638 Grade 6 | — |
Operating Parameters of the Vacuum Oil Purifier
| Parameter | Typical Range |
|---|---|
| Working Vacuum | −0.06 to −0.099 MPa |
| Temperature Range | 20–80°C (40–70°C optimal) |
| Working Pressure | ≤ 0.3–0.5 MPa |
| Power Supply | 380V, 50Hz, 3‑phase (customizable) |
| Continuous Operation | ≥ 150–200 hours |
| Mean Time Between Failures | ≥ 8,000 hours |
——Single-Stage vs. Double-Stage Vacuum Oil Purifier: Technology Comparison
| Feature | Single‑Stage | Double‑Stage |
|---|---|---|
| Vacuum System | One vacuum pump | Rotary pump + Roots booster pump |
| Ultimate Vacuum | −0.06 to −0.095 MPa | −0.08 to −0.099 MPa (deeper vacuum) |
| Evacuation Speed | Standard | Much faster |
| Dehydration Efficiency | Good | Excellent |
| Degassing Efficiency | Good | Superior |
| Best For | Transformers below 110 kV | Transformers ≥ 110 kV and above |
| Applications | Standard purification | Ultra‑high voltage, 220 kV, 500 kV equipment |
Double-stage vacuum oil purifier systems add a Roots booster pump that dramatically increases evacuation speed and achieves deeper vacuum levels, resulting in lower residual water and gas content.
——Vacuum Oil Purifier Flow Rates and Model Selection Guide
Vacuum oil purifier systems are available in a wide range of capacities to suit different transformer sizes and processing needs:
| Model | Flow Rate (L/H) | Heater Power (kW) | Total Power (kW) | Weight (kg) |
|---|---|---|---|---|
| LYJ‑10 | 600 | 12 | 13.5 | ~230 |
| LYJ‑20 | 1,200 | 13 | 14.5 | ~250 |
| LYJ‑30 | 1,800 | 15 | 16.5 | ~280 |
| LYJ‑50 | 3,000 | 30 | 33.5 | ~300 |
| LYJ‑100 | 6,000 | 48 | 53 | ~550 |
| LYJ‑150 | 9,000 | 60 | 65 | ~700 |
| LYJ‑200 | 12,000 | 72 | 76 | ~950 |
| LYJ‑300 | 18,000 | 90 | 98 | ~1,200 |
Larger custom capacities up to 30,000 L/H are also available for your vacuum oil purifier needs.
——Vacuum Oil Purifier Applications: Where and How to Use It
Primary Applications for the Vacuum Oil Purifier
Transformer Oil – All voltage classes (110 kV, 220 kV, 500 kV+)
Mutual Inductor Oil – For instrument transformers
Switch Oil – For circuit breakers and switchgear
Capacitor Oil – For power capacitors
Refrigeration/Freezer Oil
Cable Oil – For oil-filled cables
Operational Modes of the Vacuum Oil Purifier
Online Purification – Transformer remains in service
Offline Purification – Transformer taken out of service
Vacuum Oil Filling – Using the machine as a vacuum source
Vacuum Drying – Drying transformer insulation
Hot Oil Circulation – On-site drying of power equipment
——Vacuum Oil Purifier Industry Standards and Compliance
Vacuum oil purifier systems and the purified oil they produce comply with major international standards:
| Standard | Application |
|---|---|
| ASTM D1533 | Water content measurement (Karl Fischer titration) |
| ASTM D2945 | Gas content measurement |
| ASTM D1816 | Dielectric breakdown voltage testing |
| ASTM D3487 | Specification for new mineral insulating oil |
| IEC 60422 | Maintenance of mineral insulating oil |
| IEC 60156 | Breakdown voltage testing |
| IEEE C57.106 | Guidelines for acceptance and maintenance of insulating oil |
| ISO 4406 | Oil cleanliness classification |
Note: Purified oil from a high-quality vacuum oil purifier typically meets or exceeds the requirements of all these standards.
——Vacuum Oil Purifier Economic Benefits: Cost Savings and ROI
Cost Savings with a Vacuum Oil Purifier
Regenerated oil costs < 80% of new oil, sometimes as low as 50%
Extends transformer oil service life significantly
Reduces transformer replacement frequency
Eliminates waste oil disposal costs
Reduces maintenance costs by 90% compared to traditional treatment methods
Case Study Example
A major power plant using a vacuum oil purifier achieved $18,000+ in monthly savings through reduced filter element replacement costs and prevented a potential $480,900 equipment failure.
Environmental Benefits of the Vacuum Oil Purifier
Zero waste oil generation
Prevents negative environmental impact from oil disposal
Reduces need for new oil production
——Vacuum Oil Purifier Maintenance Guide: Best Practices
Routine Maintenance for Your Vacuum Oil Purifier
| Task | Frequency |
|---|---|
| Vacuum pump oil change (first) | After 100–200 hours of operation |
| Vacuum pump oil change (subsequent) | Every 300–500 hours |
| Filter element replacement | Every 3–6 months or when pressure differential alarm triggers |
| Vacuum tank gasket inspection | Annually |
| Heater and vacuum tank temperature check | Routine monitoring |
Proper Shutdown Procedure for the Vacuum Oil Purifier
When stopping the vacuum oil purifier, disconnect heating power for 5 minutes before stopping oil pumps to prevent localized oil decomposition and hydrocarbon gas generation.
Common Issues and Troubleshooting for Your Vacuum Oil Purifier
| Issue | Possible Cause | Solution |
|---|---|---|
| No oil output | Closed valves, clogged filters, low vacuum | Check valves, clean/replace filters, inspect vacuum level |
| Cloudy/milky sight glass | Water contamination in vacuum pump oil | Replace vacuum pump oil immediately |
| Poor dehydration | Low temperature, vacuum leak | Increase temperature, check system tightness |
| Oil spray at exhaust | Exhaust filter clogged | Replace oil mist separator |
——Vacuum Oil Purifier Manufacturers: Leading Brands and Suppliers
The vacuum oil purifier industry is centered in Chongqing, China, home to numerous established manufacturers with decades of experience. Leading vacuum oil purifier manufacturers include:
Zhongneng Oil Purifier Manufacture Co., Ltd. – 12+ years experience
TOP Oil Purifier Co., Ltd. – 12+ years, CE/ISO certified
Fuootech Oil Purifier Technologies Co., Ltd. – 6+ years, SGS/BV certified
Rexon Oil Purification Co., Ltd. – 7+ years, SGS/BV certified
Sino-NSH Oil Purifier Manufacture Co., Ltd. – Since 1992, certified high-tech enterprise
Newsin Oil Purifier Manufacture Co., Ltd. – R&D and manufacturing specialist
Most vacuum oil purifier manufacturers offer customization options including:
Custom voltage and frequency
Mobile trailer or fully enclosed designs
Explosion-proof configurations
PLC automatic control systems
Custom colors
——Vacuum Oil Purifier FAQ: Frequently Asked Questions
Q: What is the typical water content after purification with a vacuum oil purifier?
A: ≤ 3–5 ppm, measured per ASTM D1533.
Q: How much does a vacuum oil purifier cost?
A: Prices range from approximately $8,000** for smaller units to **$36,800+ for large-capacity systems.
Q: Can the vacuum oil purifier operate while the transformer is online?
A: Yes, most vacuum oil purifier units are designed for online operation while the transformer remains energized.
Q: What is the difference between single-stage and double-stage vacuum oil purifiers?
A: Double-stage vacuum oil purifier adds a Roots booster pump for deeper vacuum and faster evacuation, making it ideal for transformers ≥ 110 kV.
Q: How often should the vacuum oil purifier be maintained?
A: Vacuum pump oil every 300–500 hours, filter elements every 3–6 months, and annual gasket inspections.
Q: Does a vacuum oil purifier remove dissolved gases?
A: Yes, vacuum oil purifier systems remove both free and dissolved gases, reducing gas content to ≤ 0.1%.
Q: What standards does oil purified by a vacuum oil purifier meet?
A: Purified oil typically meets or exceeds ASTM, IEC, and IEEE requirements for new or in-service insulating oil.
——Vacuum Oil Purifier Conclusion: Why You Need One for Transformer Maintenance
Transformer oil vacuum purifier systems are essential equipment for maintaining the reliability and longevity of power transformers. By efficiently removing moisture, gases, and solid contaminants, these machines:
✅ Restore oil dielectric strength to ≥ 65–75 kV
✅ Extend transformer and oil service life
✅ Reduce maintenance and replacement costs
✅ Enable online purification without service interruption
✅ Comply with all major international standards (ASTM, IEC, IEEE)
✅ Support environmental sustainability by eliminating waste oil
Whether for a small distribution transformer or a 500 kV super-voltage unit, there is a vacuum oil purifier solution to match every requirement.
For more information, technical specifications, or to request a quotation for a vacuum oil purifier, please contact us.
——Enhanced Packaging Protection
Don't worry about long sea voyages
Anti-compression and anti-shock: high-strength winding film (pre-stretching rate ≥300%) + Wooden Case
+20’Container, and are rust and moisture-proof.
——After-sales Service
1. Professional Commissioning
Precise adaptation: optimisation of core winder parameters (tension, speed, moulds) according to production requirements.
2. On-site installation service (1 day)
Provide size drawings: Ensure seamless integration of site and production line.
We can also assign engineers overseas to install on-site for you.
3. Full-cycle training (3 days)
Three-stage course: basic operation → advanced technology → safety norms.
4. Warranty (1 year)
One year from customer acceptance and commissioning of the toroidal winding machine.
——Related Products
Also called Dielectric Withstand Voltage Tester, Withstand Voltage Tester, Hipot Tester / High Potential Tester,Dielectric Breakdown Voltage Tester(BDV Tester)
Also called Laminated Transformer Core, Laminated Magnetic Core, Laminated Iron Core, Stacked Transformer Core, Grain-Oriented Laminated Core
Also called Vacuum Annealing Oven, Vacuum Heat Treatment Furnace, Vacuum Furnace. After annealing the core without oxidation, eliminate internal stress, reduce iron loss.
Request a Quote
Learn More From
Why Choose Us?
Case Validation: 50+ multinational companies have been served, equipment failure rate <0.3%, customer repurchase rate of 82%.