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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

Announcement: Swiss Export Event

Swiss Export Best Practice

Sistag goes to Singapore. What prompted us to take this big step three years ago will be reported at the swiss export best practice event on April 15, 2026.

CNC machining system

Automated manufacturing

Nearly 80 of these machine pallets are in use in our Fastems multi-level system at our production site in Switzerland. Thanks to them, we can produce around the clock—even at night and without personnel.

ARA Neugut training

Budding Wey experts

The team at ARA Neugut near Zurich is well on its way to becoming specialists in knife gate valves. In a full-day workshop at the Sistag factory, participants learned everything they need to know about independently setting, installing, maintaining, and repairing Wey valves.

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