http://www.yunengoilpurifier.com/

Chongqing Yuneng Oil-Filter Manufacturing Co.,Ltd, B. District, Tongxing Industrial Park, Beibei, Chongqing (2026)

09/04/2026

SF6 Gas Refining Machine: Turning Waste Gas into a Strategic Asset
Recovered SF6 gas is rarely reusable without treatment. Decomposition products—such as SO₂, SOF₂, HF, moisture, and air contamination—accumulate over years of operation, especially in high-load HV and EHV systems.

A modern SF6 gas refining machine enables utilities to:

Restore degraded gas to ≥99.9% purity
Meet IEC 60480 regenerated gas standards
Eliminate the need for virgin SF6 procurement
Support circular economy objectives
Core Refining Technologies
Advanced SF6 gas refining machines integrate:

1. Multi-stage filtration:
Molecular sieves for moisture removal (dew point ≤ −40 °C)
Activated alumina and carbon for acidic by-products

2. Cryogenic liquefaction and separation: Efficient separation of SF6 from air, N₂, or CF₄

3. Precision purity control: Output gas purity ≥ 99.9% by weight

These features are vital, particularly for HV (52-145 kV) and EHV (greater than 145 kV) equipment, where the quality of gas has a direct impact on the machine's insulating materials and, hence, its long-term reliability.

Matching SF6 Treatment Strategies to Voltage Classes
1. Medium Voltage (≤24 kV) – Ban Effective 2026
Immediate transition to alternative gases in new equipment

Existing installations require:

Compact sf6 gas vacuum pump units
On-site or centralized SF6 gas treatment systems
High maintenance frequency makes fast recovery cycles essential

2. High Voltage (52–145 kV) – Ban Effective 2028
Large installed base remains operational well beyond 2030

Requires:

High-capacity vacuum pumping systems
Industrial-grade SF6 gas refining machines
Emphasis on gas purity to maintain insulation margins
3. Extra-High Voltage (>145 kV) – Ban Effective 2032
Long asset lifespans (40–50 years)
Extremely high gas volumes per compartment
Demands:
Multi-stage vacuum and recovery systems
Advanced refining to avoid costly gas replacement
Redundant monitoring and digital compliance records

24/03/2026

How SF6 Gas Treatment Supports Compliance Under the EU Ban After 2026
Sulfur hexafluoride (SF6) is a common choice for medium-, high-, and extra-high-voltage switchgear as the insulation and arc-quenching gas. However, with the number of global warming potential (GWP) values of around 24,300, SF6 is currently the focus of strict regulatory measures, especially the EU F-gas Regulation (EU) 2024/573.
The rule does not prohibit the use of SF6 in new electrical equipment immediately via a voltage-dependent phased banning system, unlike sudden bans. As a matter of fact, this measure, step by step, changes the way maintenance, refurbishment, and the management of asset life-cycle must be planned by utilities, EPC contractors, and equipment owners.

In this situation, SF6 gas purification, which is based on modern SF6 gas vacuum pumps and SF6 gas refining machines, is turned into an important compliance and sustainability strategy rather than a regular maintenance job.
Understanding the SF6 Ban: Voltage Levels and Effective Dates
Not all types of equipment are affected by the EU regulation in the same way. Rather, it is centred on low-voltage systems first and then spreading to higher voltage classes, which might require longer validation cycles for technical alternatives.
FAQ
Q1: How does investing in an SF6 gas refining machine reduce operating costs?
An SF6 gas refining machine is available that purifies and reuses contaminated or aged SF6 to ≥99.9% purity, thereby eliminating repeated purchases of virgin gas.
Refining can reduce the lifecycle gas costs by 40-70% for high- and extra-high-voltage equipment with large gas volumes. This will also be a way to adhere to the future restrictions on the use of virgin SF6.

Q2: What specifications should be prioritized when sourcing SF6 gas handling equipment?
Oil-free sf6 gas vacuum pump systems (to avoid gas contamination)
Refining systems compliant with IEC 60480
High recovery efficiency (≥99.9%)
Digital logging and audit-ready documentation

Q3: Why is oil-free vacuum technology recommended for SF6 recovery?
Oil-sealed pumps can introduce hydrocarbons into recovered SF6, making it unsuitable for reuse or refining.
The oil-free dry SF6 gas vacuum pumps play a role in eliminating subsequent pollution, also help in improving the gas quality and lessening the work of the following SF6 gas refining machines, which are mostly used in HV and EHV GIS systems.

Q4: When should recovered SF6 be refined instead of reused directly?
If the gas shows elevated moisture, acidic by-products, or air contamination—common in long-service or heavily loaded equipment—it must be processed through an SF6 gas refining machine.
Refining ensures dielectric strength is restored and prevents insulation failure after refilling.

28/01/2026

Best Practices for Transformer Oil Maintenance in Harsh Environmental Conditions
Transformers are critical components in power distribution networks, and their performance heavily relies on the condition of their insulating oil. Environmental conditions--such as extreme temperatures, moisture, dust, and chemical contaminants--can accelerate transformer oil degradation, leading to reduced efficiency and potentially equipment failure.
Maintaining transformer oil properly is critical to ensure its reliability and prolong its lifespan, so this article explores causes of oil degradation in extreme environments and provides best practices for keeping transformers running at their optimal level.

Impurities in transformer oil
Transformer Oil Degradation in Harsh Environments

Transformer oil is essential to insulation and cooling in transformers, yet harsh environments can quickly degrade its performance. Key factors contributing to oil breakdown include:

Oxidation - Long-term exposure to high temperatures and oxygen can form acidic compounds, which compromise efficiency, leading to the formation of sludge and waste products that compromise its efficiency and thus diminish effectiveness.
Moisture Ingress - Humidity and water contamination decrease dielectric strength while hastening corrosion.
Thermal Stress - High temperatures hasten chemical degradation while freezing temperatures may lead to oil thickening.
Contaminants - Dust, dirt, and chemical pollutants found in industrial or coastal environments can clog filters and diminish insulation properties, significantly decreasing insulation properties and making filtration systems inefficient.
Electrical Stress - Arcing and partial discharges produce harmful gases which deteriorate oil quality, creating electrical tension within a circuit and degrading its quality.

20/01/2026

How Double-Stage Vacuum Transformer Oil Filtration Works
A double-stage vacuum transformer oil filtration machine has two stages of vacuum. The first stage is usually a vacuum booster pump and the second stage is a rotary vane or similar backing pump. This design makes the vacuum level much deeper and more stable.

In double-stage systems, transformer oil undergoes enhanced atomization and extended exposure time inside the vacuum chambers. This allows not only free water but also deeply dissolved moisture and gases to be efficiently removed.

Key Characteristics of Double-Stage Systems:

Two-stage vacuum pump configuration
Higher and more stable vacuum levels
Superior degassing and dehydration performance
Suitable for high-voltage and critical applications

Double-stage vacuum transformer oil filtration machines are widely used in high-voltage substations, power plants, and transformer vacuum oil filling processes.

06/01/2026

Common Uses in Vacuum Processing of A Transformer
Vacuum pumping systems are crucial in starting up and maintaining a transformer.

1. Vacuum Drying (Moisture Removal)
There is a need in the process of vacuum drying, which comes from the hygroscopic nature of the solid insulation of the transformer. Even the smallest amounts of moisture in the insulation diminish the dielectric strength and speed its thermal degradation. The system starts the process by lowering the pressure, thus enabling moisture trapped in the cellulose to vaporise. This is the principle on which the transformer vacuum drying machine functions, where, under a vacuum, the boiling point of water drops to a lower level. This ultra-deep, low-temperature vacuum is the only process that does not thermally stress the insulation, thus resulting in the removal of deep-seated moisture.

2. Transformer Evacuation and Oil Injection
After the drying phase, the transformer has to be filled with insulating oil under vacuum conditions. This process is the work of the transformer evacuation system, which serves two purposes.

Removal of Gas: We have to ensure that there is no air and residual gases in the tank and windings. This is to ensure there is no partial discharge activity when the unit is activated.
Complete Impregnation: If an oil tank is maintained under high vacuum and oil is injected, the fibrous insulation is fully penetrated, and no air bubbles are trapped because of the high vacuum. It is very important to the EHV/UHV systems that pumps like the 150m3/h vacuum pump for power transformers can do vacuum drying and then, injection of oil directly to high voltage transformers, including 1000kV, for ultra high voltage systems.

3. Broader industrial applications
Deep vacuum generation principles extend the use of these systems to other high-precision industries, even beyond the power sector. The versatile transformer evacuation system is beneficial to vacuum smelting, chemical pharmacy, welding, and the production of electric vacuum devices, along with multiple other devices, showcasing its use beyond grid maintenance.

Conclusion: Elevate Your Grid Reliability with Yuneng
Much more than a simple pump, the vacuum pumping system is a sophisticated multifunctional device, which forms an integral part of the complex system of critical electrical infrastructure of utmost importance, ensuring operational integrity. These systems, with the help of advanced vacuum configurations like the ZJ Series with Roots Pumps, achieve and maintain ultra-deep vacuum levels, facilitate efficient vacuum drying, and ensure flawless oil impregnation. Improved grid reliability and reduced maintenance costs, coupled with extended transformer life, are what these systems promise.

If you are seeking to minimize transformer downtime, achieve unparalleled deep vacuum for your 1000kV apparatus, and ensure decades of reliable service, choose the proven efficiency of Yuneng’s specialized vacuum pumping systems.

Stop compromising on quality. Contact Yuneng today to request a quote, explore our ZJ Series units, and secure the definitive solution for your transformer evacuation and drying needs.

19/07/2025

How to Choose the Right Vacuum Oil Purifier for High-Voltage Transformers
Maintaining the purity of transformer oil is of critical importance to ensuring its reliable operation in high-voltage transformers. Contamination from water, gases, and particulate matter can reduce the dielectric strength of oil, leading to equipment failure and costly downtime. Selecting an efficient vacuum oil purifier will ensure optimal performance and longevity for your high-voltage transformers; this guide will walk you through challenges, types, selection criteria, and steps for selecting one tailored specifically to your needs.

Vacuum Oil Purifier
Challenges in High-Voltage Transformer Oil Filtration
Maintenance of transformer oil purity in high voltage systems (500kV+) can be both demanding and daunting due to stringent dielectric requirements. Key issues include:
1.Moisture Sensitivity: Even trace moisture ( more than 5ppm) can greatly compromise insulation performance, increasing the risk of arcing and breakdowns.
2.Gas Dissolution: Dissolved gases (e.g.,over 0.3% by volume) can form bubbles when subjected to high voltage, leading to partial discharges and potential damage to equipment.
3.Particulate Contamination: Sub-micron particles accelerate aging processes and block cooling channels rapidly, necessitating high-b filtration (b>=5000).
4.Oxidative Degradation: High temperatures and oxygen exposure increase acidity and sludge accumulation, necessitating advanced regeneration or additive-stabilized oils as solutions.
5.Scale and Efficiency: When working with large oil volumes (e.g. 20,000+ liters), high-flow systems that use energy efficient vacuum dehydration technology such as sub 80 Pa are required for effective performance.
These challenges highlight the necessity of precision filtration technologies, including multi-stage vacuum systems to achieve ultra-low levels of moisture/gases.
Types of Vacuum Oil Purifiers for Transformer
Selecting an effective vacuum oil purifier for high-voltage transformers is crucial to ensure effective oil treatment, with each type offering specific capabilities to address contamination levels, transformer sizes, and operating conditions. Below are the main types used within this industry.

1. Single-Stage Vacuum Purifiers
Single-stage vacuum purifiers provide the simplest form of oil purification systems, using just a single vacuum chamber, and are effective at extracting free and emulsified water, gases, and particulate matter from transformer oil. These units typically suit low to medium voltage transformers or routine maintenance cycles on high voltage transformers with minimal oil contamination; their economic nature means they may not achieve degassing levels required in high voltage applications where oil contamination levels exceed an acceptable limit.

Single Stage Transformer Oil Purification Plant

2. Double-Stage Vacuum Purifiers
Double-stage vacuum purifiers, commonly referred to as high-efficiency purifiers, are specifically tailored for more demanding purification tasks. Utilizing two vacuum chambers in combination, double-stage purifiers achieve deeper levels of dehydration and degassing for high voltage transformers as they remove both water content of below 5ppm while total gas content drops under 0.3% reducing moisture and gas extraction to an unprecedented extent; making these ideal tools for commissioning, repair work or after oil testing has identified elevated contamination issues as they ensure purified output results are consistently achieved.

Double-Stage Vacuum Purifiers
3. High Vacuum Oil Purifiers
High vacuum oil purifiers represent the pinnacle of purification technology. Operating at ultra-deep vacuum levels, these purifiers can handle extremely contaminated oil in ultra-high voltage transformers while offering additional features such as thermal regeneration, automatic moisture sensors, and advanced control interfaces for added reliability and performance of mission-critical power equipment.

High Vacuum Oil Purifiers

4. Mobile and Online Purifiers
To provide operational flexibility, mobile and online vacuum oil purifiers are indispensable tools. Mobile purifiers consist of skid-mounted or trailer-mounted units which can easily be transported between substations for efficient service across various sites; online purifiers treat oil without de-energizing transformers first - perfect for continuous transformer service such as those found in power plants or substations where any downtime would cause serious disruptions.

Mobile Transformer Oil Purification Plant
Critical Selection Criteria for Vacuum Oil Purifiers
Finding an efficient vacuum oil purifier for high voltage transformers (>=220kV) requires careful evaluation of performance, safety, and operational efficiency criteria. Here are the key ones:
1. Vacuum Depth and Efficiency
A vacuum oil purifier should achieve a deep vacuum level to effectively extract moisture and gases that dissolve in oil, such as moisture from humidity-laden air or the release of hydrogen gas from heating elements. Deep vacuum processing also plays an essential part in maintaining dielectric strength of high voltage transformer oils, which operate under extreme electrical stress, so look out for purifiers featuring dual-stage vacuum systems for enhanced moisture/gas removal capabilities.

2. Filtration Precision and Capacity
To effectively treat transformer components from wear-causing particles as small as 1-5 microns, filter out contaminants with precision that meets transformer oil volume requirements so filtration capacity matches up during treatment for continuous operation and complete purification. Filtration precision also protects components against potential wear due to particles as small as 1-3 microns that could erode away its coating over time and accelerate wear and tear. Likewise, to maximize longevity, ensure your purifier matches up perfectly to match its oil volume capacity so treatment continues and complete purification during treatment is effective throughout its operation and treatment duration - ensure it can meet both requirements!

3. Moisture and Gas Removal Efficiency
High-voltage transformer oils are particularly susceptible to moisture and dissolved gases that affect their dielectric strength and dielectric breakdown, potentially leading to issues like arcing or overheating. A vacuum oil purifier specifically designed to achieve low moisture levels (generally below 5ppm) while efficiently extracting any potential issues can ensure the oil's optimal performance is restored to an optimum state.

4. Purifier Flow Rate and Processing Time
To maximize efficiency, purifier flow rates must correspond with the volume of oil to be processed, with higher flow rates offering faster treatment without compromising efficiency. When purifying large transformers, it's especially essential that a purifier with sufficient flow rates be chosen in order to minimize downtime by purification being completed within an acceptable timeframe and thus prevent outages from occurring due to extended purification processes.

5. Automation, Monitoring, and Safety Features
Modern vacuum oil purifiers feature sophisticated automation and monitoring features like PLC control panels, remote diagnostics, and real-time fault detection to maximize operational efficiency while staying within safe parameters. Furthermore, temperature and pressure controls as well as emergency shutdown mechanisms play a vital role in protecting both transformers as well as operators during purification processes.

Transformer Vacuum Oil Purifiers on site

Steps in the Vacuum Oil Purifier Selection Process
Selecting an oil purifier system suitable for a high-voltage transformer requires careful consideration and should follow these steps:

1. Examine Transformer Specifications
To select an efficient transformer, the initial step should involve carefully considering its specifications: voltage rating, oil volume, and operational environment (i.e., indoor versus outdoor installation). Transformers with higher voltage ratings may require purifiers with enhanced capabilities - higher vacuum depth or increased flow rates being just two examples of such qualities.

2. Analyse Oil Condition
To evaluate the current condition of oil, perform routine oil tests. Measure moisture content, gas levels, acidity level, and dielectric strength in order to get an idea of its current state and identify areas of contamination while providing insight into the purifier's capabilities, like dehydrating or degassing levels necessary for optimal performance.

3. Define Your Purification Needs
Based on your oil condition and transformer specifications, establish what your purification requirements will be. Consider whether the purifier needs to handle moderate or severe contamination levels, as well as whether a mobile unit (for on-site temporary use or installation at a permanent location) would suffice or if an online purification system can minimize downtime by operating while your transformer remains operational.

Moisture on Transformers
4. Evaluate Purifier Performance and Features
Once your needs have been established, compare performance specifications of different vacuum oil purifiers. Consider key characteristics like vacuum depth, filtration capacity, and moisture/gas removal efficiency before considering systems equipped with automated features, real-time monitoring, or safety features like pressure controls, temperature regulation, or emergency shutdown to ensure safe and effective operations.

5. Consult Manufacturer and Support Services
To determine which purifier manufacturer or provider best meets your needs, speak to them to assess whether their experience with high-voltage transformers meets them, check customer references, and ensure after-sales support services. A reliable vendor should offer comprehensive maintenance plans as well as training to keep systems operational over their lifespan.

By following these steps, you can confidently select a vacuum oil purifier to ensure efficient and effective purification of transformer oil, improving performance and prolonging the lifespan of transformers.
To Conclude
Selecting the right vacuum oil purifier for high-voltage transformers is crucial for preventing failures, extending transformer life, and ensuring grid reliability. By understanding the challenges, types of purifiers, key selection criteria, and a structured decision-making process, you can invest in a system that delivers optimal performance and safety.
For high-voltage applications, prioritize high-efficiency dehydration, robust filtration, and compliance with industry standards to maintain peak transformer performance.
Need expert advice on transformer oil purification? Contact us today for a tailored solution!

06/11/2024

What is the Automatic Control System of the Transformer Oil Purifier?

The automatic control system of the Transformer Oil Purifier is the core component of the equipment, which ensures the automation and efficient operation of the filtering process. The automatic control system is usually composed of sensors, motors, solenoid valves, control components, and protection components. These components work together to achieve real-time monitoring and automatic adjustment of key parameters such as oil temperature, oil pressure, liquid level, vacuum degree, etc.

The Role of the Automatic Control System
The automatic control system of the Transformer Oil Purifier is a key component to ensure the efficient and stable operation of the equipment. Its main functions include:

Real-time monitoring and adjustment: The automatic control system monitors key parameters such as oil temperature, oil pressure, liquid level, vacuum degree, etc. in real time through sensors, and automatically adjusts the working status of heating, vacuum, filtration, and other systems according to the preset program to maintain the optimal conditions of the oil treatment process.
Protect equipment safety: The system has interlocking functions such as overload protection, overpressure alarm shutdown protection, and oil shortage protection. It can take timely measures when abnormal conditions are detected to prevent equipment damage and safety accidents.
Improve processing efficiency: The automatic control system can automatically adjust the processing parameters such as heating temperature, vacuum degree and filtration speed according to the actual situation of the oil, thereby improving the purification efficiency of the oil and the working efficiency of the equipment.
Ease of operation: Through automated control, operators do not need to manually adjust multiple operating parameters, which simplifies the operation process, reduces the risk of human operating errors, and reduces the dependence on professional operating skills.
Data recording and analysis: Modern automatic control systems usually have data recording functions, which can store key data in the oil treatment process, facilitating later data analysis and equipment maintenance decisions.
These functions of the automatic control system jointly ensure that the Transformer Oil Purifier can provide stable and reliable oil purification services under various working conditions, which is crucial to the safe operation of the power system.

Key Components of Transformer Oil Purifier Automatic Control System
The automatic control system of a transformer oil purifier is a complex network of interconnected components that work together to ensure efficient and safe operation. Below is a more detailed breakdown of these key components:

1. Programmable Logic Controller (PLC)
The Programmable Logic Controller (PLC) is the central hub of the automatic control system, often referred to as the “brain” of the operation. The PLC is responsible for executing the control logic that governs the operation of the purifier. It continuously processes input data from various sensors, makes decisions based on pre-programmed instructions, and sends commands to actuators and other control elements.

Processing Inputs: The PLC receives data from sensors that monitor temperature, pressure, flow rates, and other critical parameters. This real-time data allows the PLC to adjust the operation dynamically.
Executing Control Logic: The control logic within the PLC is programmed to maintain the optimal operating conditions. For example, if the oil temperature exceeds a preset limit, the PLC might trigger a cooling process or shut down the system to prevent damage.
Flexibility and Customization: PLCs can be reprogrammed to adapt to different operational requirements or to improve the efficiency of the purification process. This flexibility makes them invaluable in handling the complexities of transformer oil purification.
2. Sensors
Sensors continuously monitor the various physical parameters critical to the purification process. Accurate and reliable sensor data is used for the PLC to make informed decisions.

Temperature Sensors: These sensors monitor the temperature of the oil and the purification equipment. Maintaining the correct temperature is crucial for effective purification and preventing thermal degradation of the oil.
Pressure Sensors: Pressure sensors ensure that the oil is flowing through the system at the correct pressure. If the pressure is too high or too low, it can indicate a blockage, leak, or malfunction that needs to be addressed.
Flow Sensors: Flow sensors measure the rate at which oil moves through the system. Consistent flow rates are essential for ensuring that the oil is properly filtered and contaminants are effectively removed.
Moisture Sensors: In some advanced systems, moisture sensors are used to detect water content in the oil, which is critical because water can significantly degrade the insulating properties of transformer oil.
Vacuum Sensors: In systems that use vacuum dehydration as part of the purification process, vacuum sensors monitor the vacuum level to ensure optimal removal of moisture and gases.
3. Human-Machine Interface (HMI)
The Human-Machine Interface (HMI) is the component that allows operators to interact with the automatic control system. It provides a visual display of system operations and status, enabling operators to monitor the purification process in real time.

Display Panel: The HMI typically includes a touchscreen or other display devices that show data such as temperature, pressure, flow rate, and alarms. This makes it easy for operators to see the current state of the system at a glance.
Control Interface: Through the HMI, operators can manually adjust settings, start or stop the system, and respond to alarms. This interface is critical for both routine operations and troubleshooting.
Data Logging and Analysis: Many HMIs are equipped with data logging capabilities, recording operational data over time. This data can be analyzed to improve system performance, schedule maintenance, or identify trends that may indicate potential issues.
4. Actuators
Actuators are the components that physically carry out the commands issued by the PLC. They play a vital role in adjusting various aspects of the purification process to ensure it remains within the desired parameters.

Valves and Pumps: Actuators control valves that regulate the flow of oil, gases, and other fluids within the system. By adjusting these valves, the system can maintain the correct flow rates, pressure, and distribution of the oil during purification. Actuators also control pumps that circulate oil through the purifier. They ensure the oil moves at the required speed and volume to facilitate effective purification.
Heating Elements: In systems where the oil needs to be heated, actuators regulate the heating elements. They ensure the oil reaches the optimal temperature for purification without exceeding safe limits.
Vacuum Pumps: In vacuum-type purifiers, actuators control the vacuum pumps that create the necessary vacuum environment for removing gases and moisture from the oil.
Precision Control: The actuators are designed to provide precise control over the mechanical components, enabling fine-tuning of the purification process to achieve the highest quality results.
The key components of the automatic control system in a transformer oil purifier work together to create a highly efficient and reliable system. The PLC acts as the decision-maker, while sensors provide the necessary data to inform those decisions. The HMI allows operators to monitor and control the system, and actuators execute the physical adjustments needed to maintain optimal purification conditions.

15/04/2024

What is the Difference Between a Single-stage Vacuum Oil Purifier and a Double-stage Vacuum Oil Purifier?
When oil products such as transformer oil are aged or polluted, we often need to use an oil purifier to filter or purify them. We often hear that there are single-stage vacuum oil purifiers and double-stage vacuum oil purifiers. So what is the difference between these two vacuum oil purifiers? The following will introduce in detail.
What is a Single-stage Oil Purifier?

Single-stage vacuum oil purifier is suitable for insulating oil treatment of small transformers, as well as purification treatment of transformer oil, transformer insulating oil, circuit breaker oil, etc. Suitable for transformers below 110kV, the equipment is easy to operate, and can quickly and efficiently filter moisture, gas, impurities, etc. in oil. It is mainly used in power plants, the power industry, etc.
What is a Double-stage Vacuum Oil Purifier?

The double-stage vacuum oil purifier is suitable for oil purification treatment and vacuum hot oil circulation drying during the installation and maintenance of various large transformer equipment. Especially suitable for transformers above 110kV. The equipment is easy to use and can be equipped with casters for easy movement.
What is the Difference Between a Single-stage Vacuum Oil Purifier and a Double-stage Vacuum Oil Purifier?
the Functions of Single-stage Vacuum Oil Purifiers and Double-stage Vacuum Oil Purifiers Are Different.
Functions of the Single-stage Vacuum Oil Purifier:
1. It can efficiently and quickly remove mechanical impurities, gas, water, etc. in the oil.
2. It can greatly improve the dielectric strength, flash point, kinematic viscosity, and emulsification resistance of deteriorated oil.
3. The quality of deteriorated oil can quickly reach the usable standard, approaching or even reaching the corresponding new oil standard.
Functions of Double-stage Vacuum Oil Purifier:
1. The function of the double-stage vacuum oil purifier is more perfect than that of the single-stage vacuum oil purifier. Its effect of removing mechanical impurities, gases, moisture is faster and more thorough,
2. Higher improvement of the ultimate dielectric strength and flash point of the oil.
3. It can avoid the problem of oil aging caused by repeated heating of ordinary single-stage vacuum oil purifiers.
4. In addition to ordinary oil filtering functions, it can also perform vacuum drying and oil filling operations. It is suitable for vacuum hot oil circulation drying of new oil, transformer oil, switch oil, and other insulating oils at the installation and maintenance sites of various large-scale transformer equipment.
5. It integrates demulsification, dehydration, and precision filtration. After treatment, all indicators of the oil can be restored to the usable standard, ensuring the normal operation of the unit and the normal operation of the system.
Choice of Single-stage Vacuum Oil Purifier and Double-stage Vacuum Oil Purifier.
1. In terms of efficiency:
If you have high requirements for removing moisture, gas, and increase the breakdown voltage of the oil, you can choose a double stage vacuum oil purifier.
If you only need to deal with small transformers, you can choose a single-stage vacuum oil purifier.
2. In terms of processing effect:
If you have high requirements for removing moisture, gas, and water-soluble acids and alkalis, you can choose a bipolar vacuum oil purifier.
Correspondingly, if the requirements are not so high, you can choose a single-stage vacuum oil purifier.
As general equipment for processing transformer oil in the market, the two-stage vacuum oil purifier machine has an uncomplicated equipment principle. However, the specific equipment varies greatly due to the different technical conditions of various manufacturers. The service life of the equipment, the test results of the filtered oil, etc., are all related to the design of many details, the choice of configuration, and are related to the manufacture of different manufacturers.
As a leading oil purifier manufacturer in China, YUNENG not only supplies products to many oil purifier dealers but also is deeply loved and supported by domestic and foreign customers. YUNENG can provide high-quality products, customer oriented services, and extremely cost-effective prices. If necessary, please contact us.

Chongqing Yuneng Oil-Filter Manufacturing Co.,Ltd

09/04/2026

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