With a patent registered in 1956, we revolutionized the design of knife gate valves forever. The engineer’s name: Joseph Wey. The Original Wey Design and the Wey brand were born.
A Swiss innovation conquers the world
Wey products and solutions have been conquering the world ever since, and today stand for performance, reliability, quality and cost-effective solutions for knife gate and butterfly valves as well as water control gates.
Whether in mining, the pulp & paper or the food & beverage industries. Whether in wastewater treatment, oil & gas or chemical processing. Wey is the trusted name in the most demanding industries, all over the world.
Often copied, but never equaled – ever since Joseph Wey’s invention and the launch of the Wey brand, Sistag has been setting standards worldwide.
Learn more about our company and our employees.
Values that we live by and in which we believe
Wey valves ensure reliable connections in many countries around the world.
Even with our largest current Wey knife gate valve, we pay attention to every detail.
distribution partners worldwide are here to help.
We exceed expectations and take every challenge as a personal incentive.
For us, quality is key
in order to develop solutions that meet the highest demands thanks to their precision and durability. This means we are also audited by external organizations.Certifications