We are Sofis, Smart valve solutions for a cleaner and safer world.

Sofis is a manufacturer of valve operation systems such as mechanical valve interlocks, portable actuators and valve position indicators. Valve interlocks are used to guarantee a predetermined sequence of valve operations and is often customized to specifications. As all Sofis products are mounted on valves, they are bespoken to fit the valve.

We are the world’s largest interlock manufacturer, providing bespoke design solutions that protect people and property throughout the world. We create smart valve solutions that improve process and operator safety to protect people and the planet.