We are a leading international manufacturer of custom engineered high-temperature valves for the Petrochemical and Refining industries, the Iron & Steel industry, and other industrial applications.

With almost 150 years of experience and the application of the latest engineering technologies and manufacturing processes, we guarantee unique, high-quality, and specialised valves. High operating temperatures, large nominal sizes up to 6 meters - larger on request – as well as high operating frequency and very long maintenance-free operating times are IMI Z&J’s specialty.

With our in-house engineering, IMI Z&J offers customised solutions for critical applications in the petrochemical and refining industries, such as delayed coking, FCC, ethylene, PDH / isomerisation as well as blast furnace valves for the iron and steel industry.

Fast Facts


1877 - Foundation of Zimmermann & Jansen (Z&J)

1961 - Opening of a manufacturing plant in USA

2000 - Zimmermann & Jansen GmbH and RACO GmbH were merged under Z&J Technologies GmbH

2005 - Opening of a manufacturing workshop in China

2010 - Z&J GmbH joind by IMI PLC.

2011 - Th. Jansen-Armaturen GmbH joind by IMI PLC.

Employees: 230
Location: Düren, Germany

More about our visual identity:
A new visual identity, fit for the future