[IndySam]

Originally Posted by RMiller

Two notes: In this case, without the compressor, you will not actually reach 60 psi in the cylinder on the retraction. Instead, it will be about 48 psi - across the entire system).

Note, that the working pressure IndySam is the maximum allowed. If a lower pressure can be used, you will get more extensions and retractions of you pneumatic for the same amount of air.

Like IndySam said, make a spreadsheet and see what your numbers are.

Absolutely correct, just remember to know the minimum psi that your valve will work with, you can only drop the pressure so far.

You can even do different pressures for the open and retract if you use multiple regulators and solenoids.