Directional valves such as Parker Hannifin's B3G-Series threeway (left) and four-way valves are often used to control pneumatic operations. Directional-control valves are vital in any pneumatic ...

Pressure regulators, more commonly known as pressure-reducing valves, keep the output pressure constant in compressed-air systems no matter how the input pressure or output flow changes.

3/2 valves are the component used to control a single acting cylinder or piston. A 3/2 valve has three ports and has two states, either on or off which is how it got its name.