Freudenberg Sealing releases new polyurethane drinking water seal

WEINHEIM, Germany—Freudenberg Sealing Technologies has released a new high-performance polyurethane seal for drinking water systems, specifically for appliances used in water purification and carbonated water production.

The seal maintains a specific geometry, Freudenberg said, that is used in the connection between the valve of a carbon dioxide cartridge and the pressure-reducing valve on the device itself.

"It has a specific geometry that not only accommodates different valve dimensions on the various gas cartridges, but also offers high impermeability under long-lasting pressure," Freudenberg said in a news release.

Development of the new seal came about, in part, due to drinking water contamination in many countries, from microplastics, bacteria, viruses and pesticides.

Freudenberg's device at once filters tap water and enriches it with minerals and carbonic acid.

"After a customer contacted us, we began an analysis of the special conditions that such a seal has to meet," said Ulrich Wustenhagen, pneumatics product development at Freudenberg Sealing Technologies. "It quickly became clear that this project required our materials expertise as well as our development know-how and our experience in manufacturing such products."

The seal has "excellent tensile strength" in addition to "high elongation at break."

"Thanks to a very pragmatic approach, we arrived at a tailor-made solution with a customer in a short time—a solution we have now patented," Wustenhagen said. "This seal ensures that, in the future, tap water can be enjoyed confidently anywhere in the world."

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