[Al Skierkiewicz]

Camper,
This is more of a question of volume vs. pressure. You can determine the volume of air stored in the Clippard tanks at 120 PSI. When ever you send pressure to an actuator of a moving cylinder, it also uses a volume of that stored air. It is easy to determine the volume by noting the diameter of the piston and calculating it's area then multiply that area times the length the cylinder travels. When the valve that supplied the air is closed, it vents the air in the cylinder to atmosphere. If air is added to the opposite side of the cylinder or if the cylinder is moving something heavy or restrained by springs, then the return will be quick. If you do not use one of these return types then the cylinder will not move.
Does this answer the question?