Doesn't excist commercialy unless you're going into the fossiele fuel business. And those are monsters. Not suitable for us.

There are a few roboteers who made working 3/2 and 5/2 FP valves. Team Mute, Team Compactory Hard and Woody come to mind. TAN still is using the 3/2 Woody.

Hydraulic 4/2 or 4/3 valves will leak on CO2, and probably lock up, as most use very accurate polished plungers and bores to have a seal.