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MIDEL 7131 synthetic ester transformer fluid and MIDEL eN 1204

Welcome to MIDEL Service Partner – MV-Lub

MIDEL: For a Safer, Greener, Better Future.

We are your expert for Ester Transformer Fluids

MIDEL – the number one name in ester fluid technology since the 1970s.

Find out more about the advantages you have with MIDEL:

Explore the MIDEL Range

MIDEL – the number one name in ester fluid technology since the 1970s.

The MIDEL range of ester transformer fluids offers various advantages when used in power transformers or distribution units. With three different ester fluids available, customers can select the most suitable option for their specific installation and performance requirements. All three MIDEL fluids are safer in terms of fire risk and more environmentally friendly compared to traditional transformer oil.

If you’re looking for a particular ester fluid topic, use the Search function next to “Contact Us” or go straight to the technical data about our ester transformer fluids – or click here for downloads. 

Alternatively, email your questions to our ester experts at

MIDEL Applications

MIDEL for safer, greener transformers

MIDEL ester transformer fluids are used by leading utilities, transformer manufacturers, and commercial/industrial users. We prioritize asset protection and environmental safety, offering a range of natural and synthetic ester transformer fluids. MIDEL is the unrivaled choice for transformer risk mitigation.

Read more about how MIDEL ester fluids offer Cost SavingsFire SafetyEnvironmental Protection and Business Continuity solutions across the world.

Midel 7131 - safest tranformer oil on earth

MIDEL Safety Inside

Transformers have long been recognized as one of the top five high-risk assets, requiring constant attention and maintenance. However, MIDEL is revolutionizing the industry by providing solutions that meet the ever-increasing demands of transformer OEMs, utilities, and distribution network operators (DNOs). One of the key advantages of MIDEL fluids is their ability to enable assets to work harder, even at 20% overload, for extended periods. This increased capacity allows for better utilization of transformers and ultimately results in improved efficiency and cost-effectiveness for the users.

MIDEL fluids go above and beyond in terms of risk mitigation. Their high fire points significantly reduce the risk of fire and explosion, offering unparalleled safety compared to traditional mineral oil. This feature alone gives transformer operators peace of mind, knowing that their assets are protected.

Another area where MIDEL fluids excel is in their superior moisture tolerance. Moisture is a common enemy of transformers, as it can lead to insulation breakdown and other electrical issues. However, MIDEL fluids have been specially formulated to handle moisture without compromising performance. This moisture resistance ensures the longevity of transformers, reducing the need for frequent maintenance and repairs.

In addition to their technical advantages, MIDEL fluids are also environmentally friendly. Made from esters, these fluids are readily biodegradable and non-toxic. They pose no threat to the environment, making them the ideal choice for transformer operators who prioritize sustainability.

The US Department of the Interior’s Bureau of Reclamation has even endorsed the use of ester fluids, stating that they are non-toxic and biodegradable. Overall, MIDEL fluids offer a comprehensive solution for transformer users. Not only do they enhance the performance and lifespan of transformers, but they also prioritize safety and environmental responsibility. With MIDEL fluids, transformer operators can have full confidence in the reliability and longevity of their assets, knowing that they are protected from risks and contributing to a greener future.

Read here more about MIDEL pricing for MIDEL 7131 and MIDEL eN 1204