/community-hubs/deltav-community-connect/b/safety-weblog/posts/control-valves-in-safety-instrumented-functions-1981522856A reader of this blog came upon the post, When is a SIL Suitability Rating Required for Final Control Elements? The reader sent an email to the blog post author, Emerson’s Riyaz Ali , asking (of which I’ll paraphrase): When is it possible to use controlen-USTelligent Community 13