/community-hubs/deltav-community-connect/b/safety-weblog/posts/control-valve-suitability-in-safety-applicationsSometimes an email exchange turns up something developed years ago that still has great value. So is this case with an article I received as an attachment on final control elements and their suitability in safety instrumented functions (SIFs) , a.k.aen-USTelligent Community 13