Check out the information sheet here:
http://team358.org/files/pneumatic/F...structions.pdf
This is a 1 way valve, so it has a default position when it is not actively switched. So if the piston is connected to the valve as described in the operation table on that page, when the valve is not activated, the default position of the piston is with the rod retracted. You can use that to your advantage in your design - when the match is over and the robot is disabled, the rod will retract.
I think this type of behaviour is what you want. Now you need to work that into your design for use of the piston.
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FRC Team 111 - WildStang (Mentor, Drive Coach)
FTC Team 7458 - Full Force! (Mentor, Coach)
FRC Team 3132 - Australia's FIRST FRC Team! (Holy crazy first year, Batman!)
