Pneumatic technology uses pressured gas to drive some sort of mechanical motion. The most common gas used in pneumatic technology is dry air. The air must be dry as moisture has different compressive qualities. Pneumatic technology is very similar to hydraulic technology, however the fluid used to drive the motion here is always a liquid. Find out more in our complete pneumatic fittings guide.Pneumatic systems are operated using a central pneumatic device (such as an air motor or compressor) and utilise manual or automatic solenoid valves to control the airflow around the system.Pneumatic systems contain many components, pneumatic elbow fittings being one example.What are Pneumatic Elbow Fittings Used for?Pneumatic elbow fittings are compact adaptors that can connect either single or multiple hoses.Types of Pneumatic Elbow FittingsPneumatic elbow fittings come in a variety of diameters, thread sizes, grades and materials. These adaptors allow the user to change the connections in a system so an assortment of hoses can be attached.