A warm welcome

A quarter of a century in the business and not a bit tired: Our owner-managed family company is an integral part of the international compressed air industry. And that's how it should be!

Intelligent system solutions in premium quality

For 25 years now, KSI Filtertechnik is a strong and reliable retail partner on the field of compressed air technology: We develop, design, and built intelligent systems solution in premium quality.



The core business consists of the product groups:


  • KSI ECOCLEAN® Filtration Technology
  • ECOTROC® Adsorption Technology
  • KONDRAIN® & KONTREC® Condensate Management
  • KSI ECOCONTROL Online System Monitoring

Since autumn of the year 2014 the company headquarter is located in Willich in the Lower Rhine region, next to Duesseldorf. Here we develop the complete product range, design the products in 3D, make the technical drawings, built and test the prototypes, assemble the final products, control and record the quality. Everything according to EN ISO 9001.

The company is internationally well-situated: KSI produces important components of its wide product range in the Czech Republic and in England. After strict quality control the products are transported to Willich for the final mounting.