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Sizing Vacuum to Air Compressor

Sizing Vacuum to Air Compressor

Sizing Vacuum to Air Compressor

(OP)
I need to size a vacuum pump so that 1 inch of Hg is maintained while 300 cfm @ 100psi air is pumped in. Any ideas? I was thinking maybe P1V1=P2V2 for the volume of air at 14.7 psi and then size the vac from there?? Thanks

RE: Sizing Vacuum to Air Compressor

Is it 300 cfm at 100psi(that is hell lot of it) or 300scfm? Secondly, if you don't add system volume to the vacuum pump capacity, you don't acheive the set vacuum. This is for initial condition and once your reach 1inch Hg then it is steady state condition. Your formula is correct provided the temperature remains constant and then P2 will be 1 inch Hg.

PS: P1 depends upon whether your stated acfm or scfm as I mentioned earlier
 

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