Two inlets for a PSV
Two inlets for a PSV
(OP)
Hi every one
during P&ID checking , I saw several place two inlets provided for single PSV. it gave me little surprise . can any one explain the purpose of the same.
thanx in advane.
during P&ID checking , I saw several place two inlets provided for single PSV. it gave me little surprise . can any one explain the purpose of the same.
thanx in advane.





RE: Two inlets for a PSV
If this criteria is not meet, the installation does not meet Code.
I have seen dual inlets on either side of an internal baffel (horiz vessel).
I have also seen upstream and downstream of demister pads (vert vessel).
Do your applications have internals?
RE: Two inlets for a PSV
RE: Two inlets for a PSV
If you could scan a pdf of your P&ID we might have a better idea of what you need.
RE: Two inlets for a PSV
In cases where a sudden and relatively small differential pressure can cause problems, two taps feeding one PSV can be used. This can eliminate equipment damage to internals like mist eliminator pads (as mentioned) or fluidizing packed vessels.
Without knowing more about the process you're considering, it's difficult to give any decisive advice.
RE: Two inlets for a PSV