There is no difference between check valve and NRV, both are same
I believe that servo is motorized and solenoid is magnetically activated.
no you cant
They are just about the same
XV is shutoff valve UV is under control valve
The term cock and valve are used interchangeably in the English language. The term cock has in large been replaced with valve with no functional difference between the two.
In short, More Power.
The intake valve is bigger.
Globe is used for throttling
A positive EGR valve has purple fireflies on it.
a gate valve is a one way totally open or closed valve, a control valve is a variable valve.
OS and Y stands for Opposed Stem and Yoke.