What type of oil treatment plant is suitable for processing Nycodiel ester oil used in a train transformer?

For Nycodiel (a natural ester dielectric) used in traction transformers you have two practical options depending on where and how much oil you need to treat. For depot or on‑carriage, a mobile on‑site purifier such as the CMM‑600CF is appropriate: it provides multi‑stage filtration, dehydration and vacuum degassing at about 600 L/h, includes tanks for used/new oil and on‑line oil‑quality monitoring (TOR‑5), and is designed for moving between carriages and working in a train environment.

For centralized workshop or higher throughput needs, a stationary degassing/drying/filtration plant such as the CMM‑15 is the better choice: it handles natural ester fluids, offers up to 15 m3/h in degassing/drying/filtration mode (17 m3/h in heating/filtration), fine filtration to ~1 µm, moisture targets down to ~10 ppm (options to 5 ppm), vacuum degassing and heating up to about 90 °C for viscosity control. If you must process oil while the transformer is live, consider a CMM‑R series regeneration unit sized to your flow needs. In all cases confirm elastomer/pump/seal compatibility with Nycodiel, avoid excessive temperatures beyond the ester maker’s limits, and plan oil sampling and dielectric monitoring before and after treatment.