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We are innovators and facilitators – always have been, always will be

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We are a family-owned company. That shapes our traditions and the way we think and act. We have been setting standards in the valve industry for over 60 years. Because we understand what moves people and satisfying their needs is our priority; working together to learn new things, find new solutions, and achieve unique results that inspire. Now and in the future.

Whether they come in the form of knife gate valves, butterfly and check valves or water control gates, isolation valves are our expertise. We combine engineering skills with exceptional manufacturing know-how. Our definition of performance: the highest level of quality, which stands the test of time.

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 Take a look behind the scenes

From the initial idea through to the installation.

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New at Sistag

Half-yearly meeting Sistag GmbH 2025

Half-yearly meeting

Our Sistag team in Germany works across the country to be close to our customers at all times. However, everyone celebrated the end of the first half of the year together at the Sistag factory in Ettlingen. With status reports, group work, and feedback sessions—and, of course, a big barbecue.

New Image Video

We proudly present our new Sistag image film. Get to know us and find out what makes us special – as the makers of Wey.

Sales partner training

Every year, it is a special moment for us when we bring our sales partners from all over Europe together in Switzerland for three days.

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