Need help with some Pneumatic Terminology

[Matthew Wang]

Hey all,

This is my team's first year using pnematics. I was going over the rules and read this one:
[R71-C] Solenoid valves with a maximum ⅛ in. NPT port diameter, and a maximum Cv of 0.32 (if non-KOP valves are used, the team will be required to provide part documentation validating that the valves meet these constraints).

I'm wondering what both the NPT port diameter and the Cv mean. What do they do on the solenoid?


EDIT: Another question: How exactly do you calibrate the pressure relief valve?

Also, any other general tips on putting pnematics together?