how long is the stroke cycle?

You can adjust stoke cycle by using needle valve.

What would be a pneumatic reciprocation circuit for a cylinder that has a known retract position but the extend position varies due to process variation? Can the extend be triggered by a high pressure setting?

These are fantastic videos. Thank you for putting them on YouTube. I want to make a mechanism myself some day and I will consult with you for advice and equipment.

I want to make a mechanism for pumping air from a wave riding float. Then, using many of these, employ the lightly compressed air to drive a central pump to raise water to an elevated reservoir. This water will then fall to drive a turbine back

merci