Since its foundation in 1960, IMI STI has focused on the design, development and production of complete actuation systems for the operation of industrial valves in the most demanding applications and processes across the world. IMI STI is now an international leader in valve actuation. We design and manufacture complete actuation systems, which can be fully customised to meet customer needs, applications or processes. We offer a diverse range of valve actuation (both pneumatic or hydraulic) products including linear and quarter turn actuators, smart and traditional positioners, and a full range of accessories.