Look at the photo. What do you see? I see a ball valve with:
- a valve body
- a ball
- a stem that can turn the ball
What are the high level potential failures for a ball valve?
- Stem stuck, can no longer turn (dangerous) …
exida explains Blog
Entries tagged with: Safe Failure
- by Iwan van Beurden, CFSE
- Monday, July 22, 2013
- Certification
A Ball Valve with Safe Failures! Really?
- by Chris O'Brien, CFSE
- Tuesday, February 05, 2013
- Software
How Do You Handle Interposing Relays?
Many times in the design of a safety instrumented system it is necessary to utilize an interposing relay. Typically there is not a certified relay available. Since no certified product is being used it is important to follow the requirements to justify prior use and also to design…