ZYD-50 Transformer Oil Purifier
A Challenging Start: When Oil Dielectric Strength Falls Short
On November 11, 2025, one of our valued clients in Africa commenced a critical operation: purifying transformer oil for a vital power project using our ZYD-50 Transformer Oil Purifier. The goal was to restore the oil’s dielectric strength to ensure the reliable operation of their transformer.
The initial results were concerning. After processing 3,500 liters of oil for 8 hours, two separate oil samples were tested. The average dielectric strength results were 47.9 kV and 51.5 kV, which were far below the designed performance standard of the ZYD Double Stage Transformer Oil Purifier and the client’s operational requirements. Understandably, the client immediately contacted our after-sales service team for support.

Rapid Response & Root Cause Analysis
Our technical team sprang into action on the morning of November 12, 2025. Through remote diagnostics and guided checks, we worked with the client’s team to identify potential factors that can lead to subpar initial results, and providing instructions to the Client for ZYD-50 Transformer Oil Purifier restart.


The Proof is in the Performance: Exceeding Standards
Following our guidance, the client restarted the ZYD-50 Transformer Oil Purifier at 9:00 AM. The system was allowed to run continuously, ensuring all internal components were thoroughly heated and dried by the oil flow.
The turnaround was swift and decisive:
- At 12:35 PM, an oil sample was taken using the correct procedure. The average dielectric strength had jumped to a healthy 65.4 kV—a massive improvement, already making the oil suitable for many applications.
- By 1:50 PM, with continued filtration, a final sample was tested. The result was an outstanding 76.4 kV, surpassing the international standards for transformer oil and demonstrating the full capability of the ZYD-50 Transformer Oil Purifier.



The client was thrilled. What seemed like an equipment failure was resolved within hours, turning uncertainty into absolute confidence in their investment.
Your Partner in Reliability: The ZYD Double Stage Transformer Oil Purifier Advantage
This case study underscores why the ZYD Series Vacuum Oil Purifier is the intelligent choice for critical power infrastructure:
- Engineered for Results: Equipped with a powerful dual-stage vacuum system (rotary vane pump + roots pump), it aggressively removes dissolved water, gas, and particulate matter.
- Built-in Resilience: Our machines are designed to perform consistently in challenging environments, ensuring your projects stay on schedule.
- Unmatched Support: We don’t just sell equipment; we provide solutions. Our global after-sales network and technical support are there to ensure your success, 24/7.
Don’t let transformer oil quality compromise your grid’s reliability. Contact us today to find the perfect ZYD Transformer Oil Purifier for your needs and experience the difference of working with a true partner.





