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Relief Load Calculation During Anti Surge Valve Fail Open Scenario

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#1 yog123


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Posted 04 June 2019 - 04:54 AM



How to calculate relief load during Anti surge valve (ASV) fail open case for the PSV located on suction KOD of the compressor? For understanding i have attached simple sketch of my system.


i want to perform relief load calculation for PSV A, PSV B and PSV C during fail open of ASV A, ASV B and ASV C.

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#2 PhilippM


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Posted 11 January 2020 - 01:40 PM

You can't tell which will be the governing case for each PSV without calculating the flows. It's quite possible that the ASV failure scenario will result in a higher flow than the maximum design inlet flow. Also, don't forget about backflow through the compressor itself.

#3 Bobby Strain

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Posted 11 January 2020 - 05:10 PM

Nobody can tell without a P&ID. Which includes upstream of the compressor, too.



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