DUAP - Your partner for fuel injection systems for large engines

For over 80 years, DUAP has stood for outstanding quality and reliability in the development and manufacture of fuel injection systems for large engines. Our products are used worldwide in a wide range of performance and application areas and set standards every day in terms of efficiency, durability, and high-quality maintenance services.

Our new developments focus on injection systems that use sustainable fuels, and we are an international innovation leader in this field. Discover how consistency and innovation go hand in hand at DUAP and rely on our many years of experience and expertise.

DUAP Group Alternative Fuel Systems

+41 62 956 55 55
sales@duap.ch

Markets

Our aim is to understand the need of the customer and to offer the right solution.

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Products

Innovation in injection systems is our fascination, also for alternative fuels like hydrogen and others.

And with DUAP RECON, we offer a top-quality maintenance service for our products.

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Services

We offer a wide range of services related to our injection systems, including reconditioning and services, also through our ALLINACE.

We futher offer external customers the hardening of their workpieces in our DUAP HARDENING, as well as other industrial services.

Learn more DUAP HARDENING Alliance Engine Services

DUAP News & Events

Trade Show attended

Marintec China live

DUAP live at Marintec Dec., 2-5, 20225

The Swiss consul general in Shanghai visiting the DUAP booth which was gaining great attention by customers thanks to the innovative solutions presented.

Trade Show attended

Marintec China live

DUAP live at Marintec Dec., 2-5, 20225

The Swiss consul general in Shanghai visiting the DUAP booth which was gaining great attention by customers thanks to the innovative solutions presented.

Inaugurated on November 25

Heribert Geisser Square at the heart of our company

November 25, 2025: “No one can do it alone, only the community can do it.” With these words, our patron, Heribert Geisser, who is over 90 years old, unveiled the sign dedicated to him yesterday on his 40th anniversary with the company. And DUAP, which he saved 40 years ago, continues to develop every day, thanks to the vision of our patron also, Heribert Geisser.

Jobs & Training

As a globally successful company, we offer you great jobs and development opportunities at attractive conditions. Interested? We look forward to receiving your application.

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DUAP Group - unique worldwide

Precision and innovation in the field of injection systems for large engines since 1943.

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