3000LPH vs 6000LPH Transformer Oil Filtering Machine: Which One is Right for Your Needs
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When it comes to maintaining the reliability and safety of transformers, clean and high-quality insulating oil is not optional—it’s a must. Impurities such as moisture, gases, and solid particles can lead to insulation breakdown, overheating, and even catastrophic transformer failures. That’s why choosing the right transformer oil purification machine is a critical decision for engineers, maintenance teams, and power utilities.
In this article, we compare two popular models from YUNENG: the 3000LPH Transformer Oil Filtering Machine and the 6000LPH High Vacuum Transformer Oil Purifier. By analyzing their technical parameters, performance, and applications, we aim to help you make an informed choice.
Why Transformer Oil Purification Matters
Industry standards such as IEC 60422 emphasize the importance of removing water, gases, and particles from insulating oil to extend transformer life. High moisture or gas content drastically reduces dielectric strength, while contamination can accelerate oil oxidation.
Both the 3000LPH and 6000LPH machines are designed to restore transformer oil by removing contaminants and improving breakdown voltage, but they target different scales of operation and technical requirements.
Key Technical Comparison
| Parameter | 3000LPH Transformer Oil Filtering Machine | 6000LPH High Vacuum Transformer Oil Purifier |
| Flow Rate | 3000 liters/hour | 6000 liters/hour |
| Working Vacuum | ≤ 80 Pa | ≤ 80 Pa |
| Working Pressure | ≤ 0.35 MPa | ≤ 0.35 MPa |
| Operating Temperature | 45–65 °C | 45–65 °C |
| Filtration Precision | 1–3 μm | up to 1 μm |
| Power Consumption | ~36 kW | ~70 kW |
| Weight | ~900 kg | ~1200 kg |
| Design Options | Open, enclosed, trailer type | Open, enclosed, trailer type |
If you are looking for a transformer oil filtering equipment for moderate workloads, the 3000LPH is sufficient. For projects requiring high vacuum oil purifier technology with faster throughput, the 6000LPH stands out.
Performance Differences Explained
When comparing the 3000LPH Transformer Oil Filtering Machine and the 6000LPH High Vacuum Transformer Oil Purifier Machine, the most significant differences lie in oil handling capacity, filtration accuracy, and ease of operation. For power companies, substation operations and maintenance teams, and large industrial enterprises, these differences directly impact equipment reliability and long-term operating costs.
Oil Treatment Capacity
3000LPH Model
This unit is mainly designed for routine maintenance tasks, such as standard transformer oil circulation and purification. It effectively removes free water, dissolved gases, and suspended particles. After purification, the breakdown voltage of the insulating oil can be improved to around 60–70 kV, which is sufficient for the operation and safety requirements of small to medium-sized substations and general grid maintenance.
6000LPH Model
With double the processing capacity, this model operates at 6000 liters per hour, making it more suitable for large power plants, ultra-high voltage transmission systems, and heavy-duty industrial equipment. It adopts a high-vacuum multi-stage separation system, which not only removes water quickly but also reduces oil moisture content to as low as ≤ 5 ppm, while significantly improving gas removal efficiency. This capability is particularly critical for UHV (Ultra High Voltage) and EHV (Extra High Voltage) transformers, ensuring stable performance even under extreme electrical conditions.
Filtration Precision
3000LPH Transformer Oil Filtering Machine
Equipped with a standard filtration accuracy of 3 microns, this machine is adequate for most routine power equipment oil purification requirements. Such precision provides reliable protection for medium- and high-voltage transformers, extending both oil life and equipment operation cycles.
6000LPH High-Vacuum Transformer Oil Purifier Machine
Offers a higher level of purification, with filtration accuracy reaching 1 micron. This ultra-fine filtration removes more dissolved gases and trace impurities, resulting in transformer oil purity close to laboratory standards. For systems with strict requirements, this not only enhances operational safety but also minimizes downtime caused by oil quality issues.
3. Ease of Operation
3000LPH Transformer Oil Filtering Machine
This model features a relatively simple structure, lower power consumption, and easy maintenance. It is especially suitable for users without specialized technical teams, such as small and regional power companies. With an intuitive interface and lower maintenance costs, it is ideal for general oil purification tasks.
6000LPH High-Vacuum Transformer Oil Purifier Machine
By contrast, this machine is equipped with fully automated control systems, real-time monitoring sensors, and an intelligent operation interface. While its structure is more complex, it offers greater controllability and data tracking. Operators can monitor parameters such as oil moisture content, vacuum levels, and filtration efficiency in real time, and adjust as needed. For large-scale grids and industrial users seeking efficiency and precision, this greatly improves management and operational reliability.
Application Scenarios
| Use Case | 3000LPH Transformer Oil Filtering Machine | Cost-efficient with low operational cost |
| Transformer Size | Medium to large | Extra-large, EHV/UHV |
| Workload | Periodic or occasional oil treatment | Continuous, large-scale purification |
| Budget | Cost-efficient with low operational costs | Higher upfront cost but better ROI in large projects |
| Mobility | Compact, easier to move | Heavier, often used as stationary units |
Specific Application Recommendations：
Regional substations with medium-sized transformers may only require a 3000 LPH unit for monthly or quarterly oil maintenance.
Power plants or utility companies handling high-voltage networks will benefit from the speed and precision of a 6000 LPH high-vacuum oil purifier.
Pros and Cons
3000LPH Transformer Oil Filtering Machine
✅ Affordable and energy-saving
✅ Easy to maintain and operate
✅ Ideal for standard transformer maintenance
❌ Limited throughput for large-scale projects
❌ Less precise than high-vacuum systems
6000LPH High-Vacuum Transformer Oil Purifier
✅ Higher processing capacity with advanced vacuum separation
✅ Achieves ultra-low moisture and gas levels
✅ Perfect for UHV/EHV transformers
❌ Higher purchase and operating costs
❌ Requires skilled operation and larger installation space
Expert Recommendation
When choosing between these two machines, consider three key factors:
Volume of oil to be treated – Larger workloads demand higher flow rates.
Transformer voltage class – The higher the voltage, the stricter the oil quality requirements.
Budget and operational priorities – Avoid over-specifying equipment if your daily needs are moderate.
For cost-effective routine maintenance, the 3000LPH Transformer Oil Filtering Machine is a practical choice.
For high-demand, large-scale operations requiring the highest purity, the 6000LPH High Vacuum Transformer Oil Purifier delivers superior performance.
Final Thoughts
Selecting the right transformer oil purification machine is about more than flow rate—it’s about matching the technology to your operational needs. Both the 3000LPH and 6000LPH machines from YUNENG are built with reliability and long service life in mind. By evaluating your transformer type, oil treatment frequency, and performance goals, you can make a confident and cost-effective decision.
