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PSV Sizing

PSV Sizing

PSV Sizing

(OP)
A late stage water filtration vessel operates fluid-packed.  When sizing the PSV for FIRE condition only, should a liquid, steam, or vapor valve be used?  The contents are mostly water with some oil.  One school of thought says that the vessel will first relieve liquid, then vapor, so liquid is the determining factor.  Another feels that the valve should be rated for the vapor, in particular, steam.  While the third says that although the contents are primarily liquid water, that the valve only needs to be rated for vapor service. There is a significant cost difference between vapor and steam service valves.

RE: PSV Sizing

Tweec,

There has been a lot of discussions in eng-tips about your topic. Like this thread thread1203-180139

Why don't you 'search' eng-tips first, then ask questions later if the other threads/forums does not satisfy your needs?

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