About us

Porous materials since 1953

Development, production and quality assurance in Germany

Contact & Services

Our Address

Tridelta Siperm GmbH
Ostkirchstr. 177
44287 Dortmund, Germany

Our claim: durable products - professionally manufactured, delivered on time, implemented in an economically sensible way.

Managing Director Dr. Markus Fricke

Tridelta Siperm GmbH –
Technical expertise. Reliable partner.

We have been developing and manufacturing durable, application-optimized components made from porous sintered materials at our Dortmund site since 1953. Our materials – SIPERM® R (stainless steel), SIPERM® B (bronze) and SIPERM® HP (polyethylene) – are used in numerous industrial applications in the form of sheets, pipes, molded parts and welded constructions.

We see ourselves as a reliable partner at eye level

Our customers value us as competent partners with a high level of solution expertise, economic thinking and personal commitment. We combine technical know-how with flexibility, consulting expertise and the willingness to take the time to meet individual requirements.

What sets us apart is our flexibility

We realize quantities from batch size 1 up to fully automated large series with up to one million units – always tailored to the requirements of your project.

Tridelta Siperm GmbH, formerly part of Thyssen AG, is now a subsidiary of TRIDELTA GmbH.

History

1920 -1975

1920	“Dortmunder Union” smelting works begins production of magnets
1927	Deutsche Edelstahl Aktiengesellschaft DEW is founded. Magnetbau der Dortmunder Union becomes part of this company
1940	Construction of a production facility in Aplerbeck
1952	Production of ferrite magnets (oxite)
1953	Production of highly porous sintered materials (Siperm)
1975	DEW merges with the “Thyssen Edelstahlwerke” TEW.

1992 - 2025

1992	Magnetfabrik Dortmund becomes a 100% subsidiary of Thyssengesellschaft EBG mbH
1997	Takeover of the companies in Dortmund and Hermsdorf by an investment company
1999	Opening of the first German magnet museum
2001	Acquisition of the TRIDELTA Group by a family-run company
2002	TRIDELTA GmbH can look back on over 50 years of ferrite history
2021	Conversion measures at the Dortmund site
2024	Installation of the 2 MWp photovoltaic system in Dortmund

tridelta siperm oberflächenfiltration chemische beständigkeit edelstahl natronlauge

A strong future with innovation and customer focus

Our focus is on sustainable growth – supported by consistent customer orientation and technical development. In order to live up to this claim,

we are focusing on three central areas of action:

Process efficiency through targeted optimization and automation

We continuously invest in modern production technologies and automated testing systems to ensure that the quality of our porous sintered materials remains at the highest level and to strengthen the competitiveness of our customers.

Further development of SIPERM® materials for new requirements

Through continuous material development, we specifically improve porosity, mechanical strength and chemical resistance – tailored to specific application conditions and current requirements from industry and technology.

Product innovations in close cooperation with our customers

The development of new products is practical, solution-oriented and based on partnership. Together with our customers, we realize individual system solutions that combine efficiency, functionality and process reliability in the application.

Installation of an aeration floor tridelta siperm surface filtration chemical resistance stainless steel caustic soda solution

Engineering

We guarantee the highest quality standards for products and services through a wide range of product tests and our certified quality management system.

Industry with attitude

We take responsibility.

At our TRIDELTA Group sites in Dortmund and Hermsdorf, we generate more electricity than we consume on average over the year – thanks to state-of-the-art photovoltaic systems.
From January to September alone, this generated over 2.2 GWh of energy, while our total Group electricity requirement was around 1.47 GWh.

This means that we cover our energy requirements completely ourselves and at the same time make a contribution to the regional energy supply by feeding surplus electricity into the grid.

For us, sustainability is not an add-on, but a principle.

Like quality, partnership and responsibility, it shapes our daily actions.
For the people and regions with which we are connected.
The TRIDELTA Group stands for industrial strength and a forward-looking spirit.