Forum Discussion
DougE
Sep 22, 2014Explorer
I haven't thought about natural gas laws in a long time but since the volumes are given in SCFM they should be directly comparable. The 4 SCFM compressor would be producing about 1 actual CFM at 40 psig and the 2 SCFM compressor would be producing about .25 actual CFM at 90 psig. If you compare them both at a delivery pressure 90 psig then the 40 psig compressor does have about twice the output of the 90 psig compressor. This is very rough because I've ignored temperature change (no data or swag), efficiency changes at different pressures, etc. Were I to chose a compressor I would go for the highest rated delivery pressure quoted, no tank, and the best service cycle. You can burn up a compressor topping off 6 tires without allowing cool down time.
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