What does compressed air contain?

Compressed air is a mixture of gases, primarily nitrogen (78%) and oxygen (21%), that is pressurised to create kinetic energy. By forcing air molecules into a smaller space, their density increases, causing them to move faster and generate energy. This process is carried out by air compressors, which draw atmospheric air, compress it, and store it in a tank for use.

How Does Air Compression Work?

The air compression process involves two main steps:

1. Trapping Air: Atmospheric air is captured in a container like a tank or cylinder.
2. Compressing Air: The air is pressurised by reducing the space within the container, increasing molecule density and pressure.

Different compressors achieve this in various ways:

• Reciprocating Compressors use pistons to pressurise air.
• Rotary Screw Compressors utilise dual spinning screws for compression.

Compressed air is predominantly nitrogen, oxygen, and argon, along with traces of carbon dioxide, water vapour, and pollutants. Filtration systems remove many impurities during compression, but industries like food and healthcare require exceptionally pure air. In such cases, specialised compressors and advanced filtration methods are necessary.

• Safety: Ideal for hazardous environments where sparks could lead to explosions.
• Flexibility: Easily adaptable to various applications, regardless of electrical outlet availability.
• Durability: Air-powered tools are robust and often require less maintenance.

• Air Compressor: The heart of the system, which compresses atmospheric air.
• Air Receiver Tank: Stores compressed air for on-demand use.
• Air Dryer: Removes moisture to prevent corrosion.
• Filters: Eliminate impurities from the compressed air.
• Chillers: Reduce air temperature for improved efficiency.

• Construction: Powering pneumatic tools like jackhammers.
• Automotive: Inflating tyres and operating repair tools.
• Manufacturing: Driving assembly line machinery.
• Healthcare: Providing breathable air and powering medical devices.
• Maintenance: Cleaning machinery and facilities.

Proper maintenance ensures efficiency and extends the lifespan of your system. Key tips include:

• Regularly inspecting for leaks to avoid energy loss.
• Replacing filters to maintain air purity.
• Monitoring the air dryer for effective moisture removal.
• Conducting routine checks of the compressor for wear and tear.

Compressed air quality varies based on usage requirements. High-purity air is essential for industries like food and medicine, which adhere to strict standards. Enhanced filtration and drying methods are necessary for ultra-clean air but come with increased costs and energy usage. Selecting the right compressor depends on your purity requirements, volume needs, and budget.