• Welcome at Maier Transformer Accessories

    For more than 65 years we have been a leading manufacturer of radiator valvesfor oil-immersed transformers. Our product range includes radiator valves, protection devices, dehydrating breathers, welding parts for tanks as well as accessories for pressure control and oil level indication.
  • Radiator Valves for Transformers

    Radiator Valves in different designs. The Radiator valves enable a replacement of components without the necessity of removing any insulating liquid. A distinction is made between weld neck flange radiator valves and wafer type radiator valves in accordance with DIN 42560.



  • Transformer Protection Devices

    Protection Devices for transfomers respond reliable in case of occuring failures and help to determine or prevent serious damages. Depending on the transformer type and application, different protection devices such as Buchholz relay MBP are commonly used.


  • Oil Level Indicators

    Oil Level Indicators for hermetically sealed transformers as well as transformer with expansion tank! Available in many designs.


  • Dehydrating Breathers

    Dehydrating Breathers for liquid immersed transformers and reactors with expansion tank. Available in different designs for many applications.


  • Pressure Relief Devices

    Pressure Relief Devices PRD & MPRV In various sizes with an adjustable pressure between 20 - 70 kPa. Protect your transformer - Guaranteed overpressure safety!


  • Tank Components

    Tank Components - We offer various accessories such as an oil drain device, transformer wheels, thermometer pockets, locking pieces and more.


  • Tap Changers for Transformers

    Tap Changers for Transformers - we produce a large variety of tap changers for distribution transformers in several sizes for current up to 1250 A.



And another year has gone by!

Aktuelles Weihnachten DE ENG

We would like to sincerely thank all our customers, suppliers and partners for the great partnership and the trust put in us.

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Products according to applications


Depending on the application other products are used! We summarized an overview of our products according to transformer & application.

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Our Highlights for this Year’s CWIEME in Berlin

CWIEME17 Maier 900x300

We kindly invite you to visit us at CWIEME Berlin from 20th – 20nd of June. You will find us like as last year in hall 1.2 (E28)

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Maier Accessories Maier Transformer Accessories and Tank Components
Transformer Accessories and tank components

Reliability is the basis for a successful cooperation!

The experience we have been gathering in the field of production and development of transformer accessories for many decades makes us the reliable partner of today. Adherence to delivery dates, short delivery times, predictability, and the complete fulfilment of your requirements are the measurable factors of our service.
Nowadays the efficient and smooth production flow from the release until the delivery of your transformer units is more important than ever. We support you alongside in order to provide our components when needed for assembling.


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