What are the Benefits of Double Stage Transformer Oil Filter Machine Compared to Single Stage Transformer Oil purifier?

Transformer oil is the lifeblood of transformers, insulating its components and facilitating efficient energy transfer. However, over time, contaminants like moisture, gas, and impurities can accumulate in the oil, degrading its insulating properties and putting the transformer at risk.  This is where transformer oil purifiers come in. But with two main options: single stage and double stage. Choosing the right one can be tricky. Let’s delve into the world of transformer oil filtration and see how double stage machines stack up.

Single and Double Stage Transformer Oil Purifiers

Both single and double stage purifiers remove contaminants like moisture, gas, and impurities from transformer oil. However, they differ in their approach:

Single Stage Transformer Oil Purifiers:

Single stage Transformer Oil purifier

Single stage Transformer Oil purifiers are characterized by their utilization of a single vacuum pump in the purification process. This vacuum pump creates the necessary suction to remove contaminants from the transformer oil. Single stage purifiers are particularly well-suited for routine maintenance tasks and situations where contamination levels are moderate. They are highly efficient for regular maintenance procedures, such as periodic oil filtration and purification, providing a relatively straightforward and cost-effective solution for maintaining the cleanliness of transformer oil during routine servicing.

These purifiers are capable of effectively handling moderate levels of contamination commonly encountered in standard operational conditions, efficiently removing moisture, gases, and particulate matter to ensure that the transformer oil remains within acceptable quality standards.

Double Stage Transformer Oil Purifiers:

ZJA series double-stage transformer oil filtration machine

In contrast, double stage Transformer Oil purifiers utilize two vacuum pumps in their purification setup. This dual-pump configuration enables the creation of a deeper vacuum, facilitating a more thorough removal of dissolved moisture and gases from the transformer oil. The use of two vacuum pumps in double stage purifiers allows for a more rigorous purification process compared to single stage systems, effectively eliminating even trace amounts of moisture and gases that may be dissolved in the transformer oil. The thorough removal of contaminants achieved by double stage purifiers contributes to improved performance and longevity of transformers by maintaining the purity of the transformer oil at an optimal level, helping prevent corrosion, insulation breakdown, and other issues that can compromise transformer functionality.

Double stage purifiers are particularly beneficial in critical applications where stringent purity requirements must be met, as well as in situations involving high levels of contamination or when dealing with aged transformer oil that requires comprehensive purification.

Double Stage Transformer Oil Filter Machine Compared to the Single One

This table provides a detailed comparison of single stage and double stage transformer oil filter machines, highlighting their key features and the resulting benefits:

FeatureSingle StageDouble Stage
Vacuum SystemSingle vacuum pumpTwo pumps in series: Roots pump (high speed) + Rotary vane pump (deep vacuum)
Vacuum Level AchievedLower vacuum (around 0.05 Torr)Deeper vacuum (can reach up to 0.001 Torr or lower)
DehydrationEffective for removing free and some dissolved moisture (boiling point reduction)Superior removal of dissolved moisture due to deeper vacuum (evaporation at lower temperatures)
DegasificationRemoves a good portion of dissolved gases (based on pressure differentials)Heavily contaminated oil.                               Emergency situations require fast turnaround. Transformers operating at high altitudes (deeper vacuum handles lower atmospheric pressure).Comprehensive oil treatment desired (including vacuum drying).
Oil CleanlinessGood for moderately contaminated oil, removes particulate matter through filtrationExcellent for heavily contaminated oil, achieves drier and degassed oil with improved breakdown voltage (dielectric strength)
Processing SpeedSlower processing times due to single-stage vacuum creationFaster processing times due to high-speed initial vacuum and deeper final vacuum
OperationSimpler operation with single pump controlMore complex operation due to two pumps and potentially additional functionalities (e.g., vacuum drying)
CostLower initial cost due to simpler designHigher initial cost due to more complex design with two pumps
ApplicationsRoutine maintenance of transformers with moderate contamination.                  Budget-conscious situations.Heavily contaminated oil.                               Emergency situations requiring fast turnaround. Transformers operating at high altitudes (deeper vacuum handles lower atmospheric pressure).Comprehensive oil treatment desired (including vacuum drying).
Additional FeaturesLimitedRemoves even the most stubborn dissolved gases due to a deeper vacuum (increased gas release)

When to Use Which Transformer Oil Purifier?

Transformer Oil Purifier

The choice between single and double stage purifiers depends on your specific needs: While double stage machines offer superior cleaning capabilities, single stage units can be a cost-effective solution in certain scenarios. Here’s a deeper dive into when each type of purifier shines:

Single Stage Transformer Oil Purifiers: A Budget-Friendly Choice

  • Routine Maintenance: For transformers with moderately contaminated oil undergoing regular maintenance, single stage purifiers are a viable and cost-effective option. They effectively remove a significant portion of common contaminants like free and emulsified water, dissolved gases, and particulate matter, keeping the oil in good working condition.
  • Budget Constraints: If budget is a major concern, single stage purifiers offer a more affordable solution compared to their double stage counterparts. Their simpler design translates to lower initial costs, making them a suitable choice for situations where finances are tight.

Double Stage Transformer Oil Purifiers: For When Only the Best Will Do

  • Heavily Contaminated Oil: When dealing with transformers containing severely degraded oil with high levels of dissolved moisture and gas, a double stage purifier is the undisputed champion. The deeper vacuum achieved by the two-pump system allows for the removal of even the most stubborn contaminants, restoring the oil’s insulating properties and extending its lifespan.
  • Emergency Situations: In the event of a transformer breakdown or emergency requiring a fast turnaround, the superior processing speed of double stage purifiers becomes invaluable.  They can quickly clean the oil and get the transformer back online, minimizing downtime and potential disruptions to the power grid.
  • High-Altitude Operation: Transformers operating at high altitudes present a unique challenge due to the lower atmospheric pressure. Single stage purifiers may struggle to create a sufficient vacuum in these conditions. Here, double stage machines excel, with their powerful vacuum systems ensuring effective oil purification regardless of the altitude.
  • Comprehensive Oil Treatment: Some double stage models offer additional functionalities beyond oil purification. These may include vacuum drying of transformers themselves, a process that removes moisture from the transformer insulation system. This comprehensive approach can significantly improve the overall health and performance of the transformer.
  • Future-Proofing: Double stage machines offer a level of versatility that can be beneficial in the long run. Even if your transformers currently experience moderate contamination, opting for a double stage purifier can provide a buffer for potential future issues or situations requiring a more powerful cleaning solution. 

Where Can You Find High Quality Transformer Oil Filter Machine?

Whether which kind of transformer oil filter machine you want to choose, YUNENG is your best partner. We Provide ZJB Single Stage Transformer Oil Purifier and ZJA Double Stage Transformer Oil Filtration Machine.

YUNENG stands as a distinguished authority in oil purification, providing vital equipment to rid transformer oil of impurities like solid particles, dissolved gases, and water. Our advanced machinery not only boosts the electrical characteristics of filtered oil but also prolongs the oil’s lifespan, guaranteeing enduring solutions for our international clientele. Backed by nearly two decades of proficiency, a committed team of 168 professionals, and an annual production capacity of 1,000 sets of oil filtering equipment, we serve customers across the globe with pride.