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Harveylanc

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I am looking to buy a gas booster that is electrically powered. The factory cannot give me any sort of flow chart so that I can determine how long it would take to boost air or nitrogen from a lower pressure to a higher pressure. The supply pressure would be constantly decreasing while the outlet pressure would be increasing.

After days of research I found that to get a flow curve I would need the volumetric efficiency of the pump, volume per cycle, number of cycles per minute, the starting inlet pressure and the outlet pressure. I understand that the inlet gas temperature and the outlet gas temperature would cause changes in the compressibility but I am looking more at just calculating the flow if at all possible. Although I am not sure if this is all that would be needed, I was able to get the volume per cycle, .455 cubic inches of displacement per cycle. The booster will cycle 618 times per minute and has a volumetric efficiency of 78.89%. The maximum booster pressure is 6000 psig.

I would like to calculate the scfm flow rate at different pressures such as 250 psig inlet with 2400 psig outlet, 250 psig inlet with 3000 psig outlet, 500 psig inlet and 4500 psig outlet and 1000 psig inlet and 6000 psig outlet to get a good feel for the flow rates it is capable of and how long it would take to achieve different pressures.

There may be a spreadsheet or a calculator online that would allow for the calculations however I have not found one and I would like to be able to do the calcculation and create a chart for this information. I am really unsure where to turn for assistance for something of this nature. I am not looking for someone to do all the work but I cannot figure out the caculation so if anyone on the forums would be willing to help me to understand how to create the calculation that would give a flow rate with a decreasing inlet pressure and an increasing outlet pressure I would be very thankful.