Ester fluids for transformers

Enviroil stocks the following product:
1. MIDEL 7131 synthetic ester based dielectric fluid,
2. MIDEL eN 1204 rapeseed based natural ester transformer fluid, and
3. MIDEL eN 1215 soya based natural ester transformer fluid.

Enviroil is the South African agent for the Midel range of ester produced by M&I Materials, United Kingdom.

M&I Materials


MIDEL is the world’s leading brand of ester-based dielectric fluids, used by utilities and transformer manufacturers worldwide because of its excellent track record and ability to minimise risk.

The MIDEL team is recognised in the industry as experts in the production of ester-based dielectric fluids; their commitment to delivering excellent technical support is also recognised by their customers. For assistance in choosing the right fluid for your project contact Midel today. To learn more visit About Esters.

The synthetic ester MIDEL 7131 and the natural esters MIDEL eN 1204 (rapeseed/canola) and MIDEL eN 1215 (soya) all provide the crucial combination of fire safety and environmental protection properties absent in mineral oil. They can also significantly extend the life of your transformers. Synthetic and natural esters (vegetable oils) are successfully used in new and retrofitted liquid-filled electrical equipment installations across the globe. To see how mineral oil compares to esters please visit Midel’s Fluids Comparison.