Relief capacity conversion
Relief capacity conversion
(OP)
I am looking to size a PRV for a propane cylinder and have run into a snag that my simple mind can't seem to get past. The NFPA code calculation gives an answer in lb/hr but the relief valves are certified in SCFM of free air. I can get to SCFM of propane without issue but how does one compare propane to air?
Thank you for any insight.
Jason
Thank you for any insight.
Jason





RE: Relief capacity conversion
RE: Relief capacity conversion
www.tycovalves-na.com/ld/CROMC-0296-US.pdf
Also, don't overlook contacting a local valve supplier. I'm sure they would be happy to assist.
RE: Relief capacity conversion
SCFM (air)= (flow x 13.36)/(SG x (1/SG)^.5)
where
flow= flow rate of propane in lb/minute
and SG= specific gravity of propane
RE: Relief capacity conversion
RE: Relief capacity conversion