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.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 straight fittings being one example. Learn more about the different types in our complete guide to pneumatic fittings.What are pneumatic straight fittings used for?Pneumatic straight fittings are used as adaptors and have one threaded side and the other with a tube connection. The threaded side connects to the system and the other to the tube.Types of pneumatic straight fittingsPneumatic straight adaptor 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.