exida explains Blog

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)
…

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Look at the picture. What do you see? I see a spring return actuator with

• a diaphragm chamber
• a spring chamber
• the scotch-yoke mechanism

What are the high level potential failures for a ball valve?

• Scotch-yoke mechanism breaks, can no longer operate valve…

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exida has discovered yet another forged functional safety certificate.  You can read about another occurrence in a previous blog entry.

The company name on the forged certificate is ISP SA DE CV, Cunduacan, Tab., Mex.  How could someone…

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A manufacturer whose product passes the exida IEC 61508 Assessment Scheme will receive a certificate based on IEC 61508 and perhaps other functional safety standards. There is a significant amount of information on a certificate that may not be always trivial for a novice. This document explains how one…

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