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Understanding Technical Terms - Control Valve Vendor Sheet

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#1 IonCube


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Posted 07 October 2019 - 04:41 AM

There are some terms highlighted in the Flowserve Control Valve sheet that I wasn't able to grasp. Valve is liquid servicing

The inlet pressure is ~13 barg where as Choked Drop is ~0.2 bar ( I do have understanding of choked pressure)

On 2nd page there is a weird term Detailed Cavitation (Sigma) information? What is this & how is it useful?

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#2 PhilippM


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Posted 07 October 2019 - 03:06 PM

I just googled "control valve sigma value" (without the quotation marks) and found this:



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