What type of fluid is most commonly used in pneumatic systems?

The most commonly used fluid in pneumatic systems is compressed air or inert gases. This is due to several key characteristics that make air and inert gases suitable for pneumatic applications.

Firstly, compressed air is readily available and can be easily generated using air compressors, which are standard in many industrial settings. Its ease of production and distribution makes it a highly practical choice for powering various pneumatic tools and systems.

Additionally, the compressibility of air allows for efficient energy storage and transfer. When air is compressed in a system, it stores potential energy, which can be effectively converted to kinetic energy to perform work, such as moving a piston or actuating a cylinder.

Inert gases, like nitrogen, are also used in specific applications where air may not be suitable due to moisture or contamination concerns. These gases retain similar properties to air in terms of compressibility and energy transfer while providing the benefit of being less reactive and avoiding oxidation issues.

Ultimately, the choice of compressed air or inert gases aligns with the requirements for pressure, performance, and safety in pneumatic operations, making them the fluids of choice in the field.