Explore the MIDEL Range
Three ester fluids and one regeneration service — chosen by application, never by one-size-fits-all.
The right fluid depends on the site, not on a catalogue
Selecting the right transformer fluid will depend on the individual application and location. Our long experience tells us that one-size-fits-all is a concept that doesn’t deliver the best results. The MIDEL range of ester fluids offers clear and distinct benefits so customers can choose the one that best suits the specific installation and performance criteria.
Four ways into ester
Natural esterMIDEL eN 1204
MIDEL eN 1204 is a superior natural ester transformer fluid, made from renewable rapeseed/canola oil. It delivers very effective cold weather performance (-31°C pour point) and has better oxidation characteristics than soya-based natural ester fluid. The right solution for non free-breathing transformers in cooler climates.
Synthetic esterMIDEL 7131
MIDEL 7131 is the world’s leading biodegradable synthetic transformer fluid. Proven to 433 kV and with a pour point of -56°C, this is a robust fluid for mainstream and the most demanding environments – including extremes of heat or cold, sub-sea, underground, offshore wind and traction applications – for both sealed and free-breathing units.
Natural esterMIDEL eN 1215
Natural ester based on soya bean. A renewable alternative with the same fire safety and environmental benefits as the rest of the range.
ServiceMIDEL Regen
Regeneration for ester fluid in service: the fluid stays in the transformer’s life cycle instead of being disposed of — a circular answer to maintenance.
Ester against mineral oil
| MIDEL 7131 | MIDEL eN 1204 | Mineral oil | |
|---|---|---|---|
| Fire safe – K class | |||
| FM approved | |||
| Readily biodegradable | |||
| Moisture tolerance | |||
| Enables civils savings |
We help you pick the fluid, not just ship it
Tell us about the transformer, the site and the timeline. As MIDEL Service Partner, MV-Lub supplies ester transformer fluids across Europe — from the first specification to delivery, retrofilling and support on site.
Talk to the ester experts
Technical questions, availability, retrofilling — write to us directly.