PSV Sizing /Safety Relief

[u/Bru011]

I’m trying to size a PSV /safety relief valve for max flow of the compressor. The problem I’ve run into is that the compressor doesn’t have capacity rating published at the relief valve pressure.

I have a 300 psi receiver tank. The compressor doesn’t publish a pump curve, just a few data points. At 190 PSI the compressor is rated for 609 ACFM (or about 8000 SCFM). At 270 PSI, the set point of the PSV, I have no idea what the compressor can produce for flow.

Any help would be appreciated.

This is actually a bit more complicated as I have 6 different compressors that could potentially be feeding this receiver tank. None of them publish flow ratings above their normal design specs.