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 50 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.



Shape the future with us. Ours and your own.

We are always evolving and looking for new talent. Whether it’s in product development, production, service or sales, we have plenty of exciting jobs and career opportunities to offer, including for those just starting out in their first job or for apprentices.

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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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From the initial idea through to the installation.

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New at Sistag

Explosion Protection Day Balsthal 2022

FireEx Explosion Protection Day Balsthal

We are proud sponsor of today's FireEx Explosion Protection Day in Balsthal, Switzerland. In addition to exciting presentations on explosion protection, you can see our "SpeedWey" high speed isolation valve HSI in action during the breaks.

Revision Fastems system

Revision of our FMS system

In order to manufacture cutting-edge technology, you need cutting-edge technology in machining. Our flexible manufacturing system from Fastems has therefore been thoroughly overhauled in the past weeks - with the active support of our production team. All electronic components and motors were replaced and the software got an upgrade. This way we are well equipped for the years to come.

Goodbye Werner Thürig

Saying goodbye to Werner Thürig

At last week's barbecue we took the opportunity to say goodbye to our long-time management board member Werner Thürig. After 20 years with Sistag, he is now going into well-deserved retirement. We wish him all the best!

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