Pneumatic Actuators utilize compressed air to operate valves.
They consist of a cylinder and piston where air pressure moves the piston to actuate the valve.
They are less common in subsea applications due to difficulties in managing compressed air systems underwater.
They are typically made from stainless steel and aluminum.
Pneumatic actuators have a simple design, and they are cost-effective, but they have limited use in deepwater due to challenges in maintaining and delivering compressed air.