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  1. Safone

    New PSV with different body size

    Zoobie, You didn't give full details on the pilot-op, so beware of these issues: If the nonrecoverable losses on the inlet side of the pilot-op exceed 3% and you are using a remote sense line location, then capacity should be derated. The simplest way is to reduce the relieving pressure in...
  2. Safone

    steam safety valve back pressure limit

    EGT01: The Consolidated catalog itself answered the basic question: the back pressure limits were quoted for different valve designs. What I found intersting is that the allowed limit was not constant, it varied quite a bit. E.G. the 1511 model valve can see up to 20% of Pset backpressure...
  3. Safone

    steam safety valve back pressure limit

    Sterl / EGT01 Thanks for the input. I'll advise once I've followed up your suggestions a bit more.
  4. Safone

    steam safety valve back pressure limit

    This thread goes into much detail on how to calculate the back pressure on a ASME Section I safety valve: thread408-63173 But the basic question is: what is the allowable back pressure on such a valve? I have scoured the codes and some vendor catalogs for guidance. The only thing I find is...

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