Willibrord Lösing Filterproduktion GmbH

Innovation and quality
in fuel filtration

From Hattingen to the world – reliably in use everywhere

WHAT SETS US APART

Innovation and quality
from SEPAR Filter

For over four decades, the name SEPAR Filter has stood for first-class solutions in fuel filtration. Our systems protect engines worldwide from water, dirt, and failures – from yachts and freighters to construction machinery and generators.

As a manufacturer with German engineering quality, we combine the highest manufacturing standards with practical innovations.

Innovation

We develop technologies that are efficient, precise and forward-looking.

Customer proximity

With personal advice, global service and tailor-made solutions.

Sustainability

We actively shape sustainability, beyond the requirements of ISO 14001.

Our history

Milestones since 1955

1955

1955

Foundation

Start of Willibrord Lösing Filtertechnik e. K. and the beginning of a successful development in the field of high-quality filtration technology.

1981–1984

1981–1984

Expansion & brand building

Construction of new production and logistics areas as well as the establishment of Filterproduktion GmbH (SEPAR division). Development of the first KWA pre-filters and establishment of the global dealer network: the SEPAR brand establishes itself internationally.

1989/1990

1989/1990

Technology that sets standards

Introduction and worldwide patent application of the SEPAR 2000 series – a fuel pre-filter/water separator that still defines standards in performance and reliability today.

2000–2010

2000–2010

Growth & Quality

Expansion of production areas and introduction of DIN EN ISO 9001. Relocation to the modern company headquarters Am Walzwerk and worldwide registration of the SEPAR brand.

2016

2016

Innovation in fuel filtration

Patented development of the SEPAR LKF coalescence filter system for maximum separation efficiency.

2018-2021

2018-2021

Automation & modern manufacturing

Investment in automated potting and manufacturing systems, as well as in additive manufacturing for rapid

prototypes and flexible small series.