Pump & Valve Packings Blog

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The Curse of Knowledge & Valve Packing

In 1996, Idaho National Engineering and Environmental Laboratory’s Advanced Test Nuclear Reactor operators manually shut down the reactor after noticing pressure oscillations. A control valve, which was sluggish in responding to input from the pressure control system, caused the fluctuations.

A root-cause investigation revealed that mechanics had adjusted the valve packing gland according to the vendor technical manual during the outage, tightening it because it had a visible leak. The action resulted in higher friction on the valve stem, which caused the valve’s sluggish response.

Read the entire article here.