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Originally Posted by gwross
Brian,
If you've set up your system correctly, your tanks will be pressurized to 120 psi, and the line is then regulated down to 60 psi. This allows your cylinder to fill with 60 psi air, and the line to very quickly (I'm tempted to say almost instantaneously) recover to 60 psi.
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True, but continued operation will draw down your air supply. So you need to balance cylinder size with the storage capacity of the system. In general use the smallest cylinder possible to do the job. This will greatly reduce the amount of air you consume. The volume used by one of the largest cylinders is roughly equivalent to the volume in one of the storage tanks. Since we can store at twice the operating pressure that means your first shot will be at 60 psi. But if you vent and immediately cycle the cylinder again two or three times then you will see a drastic reduction in air pressure and thus force from the cylinder.
Just another of the limitations we have to live within...