German EngineeRING

German Engineering certainly enjoys a superb reputation
worldwide, mainly for its acknowleged reliability. In all
modesty, this is very likely due to our precision O-Rings and elastomer seals, too.
As an independent manufacturer we belong to one of the leading supplier of precision O-Rings. COG delivers from Europe’s largest O-Ring stock (more than 45,000 items from stock) most various materials, including FFKM/FFPM. Besides, our developers are always happy to meet any specific requirements of the chemical industry. For more than 140 years, COG has taken care that “German Engineering” is a story with a happy ending.

Our clients define the aims of everything we do. New ideas and products are developed quickly and in a market- and goal-oriented manner for the benefit to our clients. Let‘s discuss your aims.



We are present: From April 13th to 17th, 2015 we will exhibit at the trade show Hannover Messe (Germany).

You will find us in hall 19, booth C54.

We are looking forward to seeing you at the show!



Article "Elastomer Sealing Systems - Best Practise" about COG

The renowned trade magazine "Process worldwide" has published a professional article about COG and our products. You will find this article here:

Elastomer Sealing Systems: Best Practices: Elastomer Sealing Systems for Ultra-Pure Water, CIP and SIP


Dear editorial staff of Process worldwide,

thank you very much for this publication! The complete COG team is proud of it!

New: Corporate video

COG has created a corporate video. Please have a look and enjoy the film: COG Impressions





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