Monday, February 23, 2009

Piston Seal Leakage - Rod Down

We have a cylinder mounted with the rod pointing down. It has a weight on the end of the rod.
There is a ball valve at each cylinder port.

  1. Piston seals are leaking badly
  2. Rod seal does not leak
  3. Ball valves, when closed, do not leak

What happens when the cylinder is fully retracted and both ball valves are closed?