SFC Interlocks




Trapped Key Interlocks are simple, mechanical devices, which can be customized to implement a safe sequence of operation in any process activity. Sofis (Smith Flow Control’s) Process Management Systems provide effective protection to clients’ investments in plant and equipment as well as improving employee safety and reducing the risk of damage to the environment.

Two of the interlocks we recommend our customers are:

    fit all types of lever operated quarter-turned valves, including ball, butterfly and plug valves
    fit all types of hand wheel operated valves, including gate-, globe-, and gear operated valves




Click on the product name for further information or download our interlock brochure here:


Sofis Smith interlocks brochure