How it all began…

The story of Junker-Filter – from a one-man company to a medium-sized international company.


In 1956, Mr. Adolf Junker founded the sole proprietorship Junker-Filter in Obergimpern, today’s district of Bad Rappenau, in a room of 20 m².

There was no knowledge of filtration. Learning in literature was not possible because there were no documents. There was no specialist knowledge in school education.

The first filter parts were manufactured as a one-man operation – with a borrowed sewing machine with foot operation. Unyielding willpower, inventiveness and work around the clock were necessary to ensure the survival of the company.

1960 – 1968

In the 1960s, filtration was a necessary evil, despite the fact that cement plants were considered “pollutants” that released large amounts of dust and fumes into the environment.

With the target markets of the cement and gypsum manufacturing industries, Junker-Filter started out as a supplier of filter bags.

In the mid-1960s the company area had grown to 80 m² and 5 people were employed.

1969 – 1976

Strong economic growth since the Second World War and increased environmental awareness in the first half of the 1970s allowed the Junker-Filter company to record continuous growth.

The operating area became too small and a building plot of 5,214 m² was acquired in Sinsheim, Baden.

In 1971 the company relocated to the newly built production facility. A further expansion took place as early as 1976, the operating area was approx. 893 m² at the end of the year and there were 20 employees.

1984 – 1987

The Junker-Filter company continued to grow in the 1980s. Investments in the development of a total of 1,820 m² were made with the aim of creating 42 permanent jobs by the end of 1987 according to the project.

1984 – 1985

In the baby boom years 1984/1985, the training of young people began.

Over the years, Junker-Filter has become a recognized training company of the Chamber of Industry and Commerce and even today the proportion of trainees is between 8-10% of the total number of employees.


The company has been active in research and development in the field of adsorption technology since 1985.

A new development for the automotive industry to keep pneumatic supply lines and brake systems for trucks and later cars clean resulted in growth rates of> 20% per year in the following years.

1988 – 1989

During the planning phase for the next expansion stage, the company founder Adolf Junker dies unexpectedly and his son Jürgen Junker takes on complete responsibility for the company.

The corresponding adjacent building plots are acquired and the production halls are expanded to 4,493 m².

The 1990s

The core business of textile filter systems as a component manufacturer at the Sinsheim production site has been continuously expanded through the use of state-of-the-art systems such as laser cutters, tubing lines, etc.


The administration buildings are expanded.


Junker-Filter starts an intensified research initiative and expands the R&D area, among other things through cooperation with technical universities. Our own and intensive research and development work in the “cluster network” resulted in:

  • procedural development of existing product chains
  • improved textile filter media for dust separation and solid-liquid separation
  • Strategic expansion of new business fields, to be mentioned here is the proprietary, patented BEGA process (biological-electrical odor separator)
  • Membership in various association structures




Decision for in-house mechanical engineering, primarily with the aim of planning, building and commissioning the line alignment and installation for personal use.

A solid in-house mechanical engineering was established and the machine concepts from Junker-Filter are now also offered and sold to cooperation partners or interested parties.

May 2007

Another step in the direction of diversification and the strategic expansion of new business areas was made by the majority takeover of CASAPROTECT Wassertechnik GmbH in May 2007, which is now 100% integrated into the group of companies.

2007 – 2008

Increased cooperation with global OEMs led to a growth in the export business. The globalization of the company is further advanced through international trade fair appearances and an increase in the international market presence.

At the beginning of 2008, the shareholders’ resolution to expand the Sinsheim location further in order to create the space for further expansion.

The construction of new production halls takes place in connection with a modern energy network system without fossil fuels.


On January 29th, 2009 Junker-Filter received the ISO 9001: 2008 certificate for the successful introduction and application of the quality management system for the scope of development, production and sales of industrial filters.

May 2009

As a group of companies in environmental technology, Junker-Filter takes responsibility for climate protection and future generations.

In May 2009, construction work on a completely new, innovative energy network system begins:

  • Geothermal energy
  • Photovoltaics
  • Heat recovery
  • Thermal insulation measures

By completely avoiding fossil fuels, the alternative energy network system makes a positive contribution to reducing CO2 emissions, which guarantees the sustainability of the construction work.

May 2010

Since the capacity of the existing premises for production, logistics and warehousing is exhausted and there are no more options for expansion, construction work to expand the building concept will begin in May 2010.

Junker-Filter began the planning of

  • a production hall with a total area of ​​1,450 m²
  • a warehouse with a total area of ​​1,200 m²

Both halls are designed so that they can be used as production halls.


In the category “Use of renewable energies”, Junker-Filter wins with the project “Self-sufficiency from fossil fuels – oil, gas, coal; Contribution to CO2 reduction and climate change”.

February 2012

For the first time after the successful introduction of the quality management system in 2009 and certification according to DIN EN ISO 9001: 2008, the first full audit for recertification by TÜV Süd Management Service GmbH was due in February 2012.

In a 4-day audit Junker-Filter was able to prove again that the QM system according to the guidelines of DIN EN ISO 9001: 2000 has been internalized in the entire company and has been practiced for years.


In November 2014, Junker-Filter GmbH was once again awarded the DIN EN ISO 9001: 2008 certificate by TÜV Süd Management Service GmbH for the use of quality management in the development, production and sales of industrial filters.

In addition, Junker-Filter concludes long-term contracts with well-known vehicle manufacturers.

July 2015

Junker-Filter impressed the jury with the innovative ZERO® design for filter hoses and bags. With the submission of the ZERO® design, the company succeeds in winning 1st place in the category “Emission Reduction, Processing and Separation” at the 2015 Environmental Technology Prize.


Junker-Filter was recognized as one of 100 companies on the subject of resource efficiency.

The project “100 companies for resource efficiency” was initiated in 2013 by the Alliance for more resource efficiency between the leading business associations of the state of Baden-Württemberg and the state government. The initiative aims to show how resource efficiency can be implemented in concrete terms and what benefits are associated with it. It will support the previous activities on resource efficiency in the country with concrete, presentable results and bring them to the operational level. This is intended to attract more companies to participate.


Junker-Filter received a “silver award” through the evaluation by EcoVadis. EcoVadis carries out the most trustworthy sustainability ratings for companies worldwide. With an excellent result, Junker-Filter is one of the 30% of the top performers rated by EcoVadis.


For sustainable and environmentally conscious power consumption, Junker-Filter will convert all of the lighting in the production halls to LEDs in 2018. This enables the company to make a further contribution to resource-saving and sustainable corporate management.