What does a pneumatic system primarily use for energy transmission?

A pneumatic system primarily uses compressed air for energy transmission. Pneumatic systems harness the power of compressed air to perform mechanical work by creating motion. When compressed air is released, it can be directed through various components such as actuators, valves, and cylinders, which then convert the air pressure into mechanical movement. This mechanism is particularly useful in applications that require rapid motion and precise control, making pneumatic systems popular in industries like manufacturing, automotive, and robotics.

The advantages of using compressed air include its availability, ease of storage, and the fact that it does not pose a risk of contamination or leakage like some hydraulic fluids can. Moreover, pneumatic systems can operate in environments where electrical systems might be unsafe or impractical, such as in areas with flammable materials. Thus, the reliance on compressed air is fundamental to the design and operation of pneumatic systems, setting them apart from other energy transmission systems that utilize hydraulic oil, electric currents, or mechanical gears.