[FrankJ]

I am thinking the ports are bigger than 1/8 npt, Not legal for FRC pneumatics. Since robot inspectors tend not to like anything unusual in the pneumatics, you would have a hard time getting it by them even if there were no specific rules against it.

I like the idea & the creativity though. Brass valves are typically rated WOG (water, oil, gas). And it doesn't have to be FRC legal. One concern would be the closing force is higher than the opening force (different areas in the cylinder. Sometimes an issue with wedges like gate valves.