Transformer Mineral Oils

Renkert’s Voltro™ product is a highly refined transformer mineral oil. Voltro is an electrical insulating oil which is severely hydrotreated and complies with ASTM D3487, as well as Doble Tops.

Choose this Voltro Type II inhibited transformer oil for exceptional oxidation stability to help extend the life of transformers while minimizing the need for maintenance.

Voltro advantages

  • conform to corrosive tests ASTM D3487
    method B and CIGRE IEC 62535
  • certified PCB free
  • DBDS free
  • passivator free
  • metal deactivator free
  • silicone free
  • a stable, low moisture oil
  • high flash point
  • exceptional oxidation stability

Applications for Voltro Oils

  • power and distribution transformers
  • switchgear and circuit breakers
  • rectifiers


  • reliable US and global distribution
  • convenient delivery by ship, truck, rail, drums or flexibags

For help with your application, call 800.423.6457 or email us.