Air compressors are accessories that supply power to pneumatic machines or tools, which are powered by an air compression system.

What are air compressors for?

Air compression serves to store it easily and then be directed out at high speed. Air compressors can help you with a multitude of DIY or professional tasks, such as: cutting materials, breaking stones, dumping concrete, painting, varnishing, enamelling, cleaning or filling tires, filling mattresses or balls, etc. .

In addition, in the professional sector they are used for more specific tasks, thanks to their connection with pneumatic tools: riveting, stapling, nailing, screwing or unscrewing, brushing, sanding, drilling, oil, blowing, inflating, …

Technical characteristics for choosing air compressors

The choice of an air compressor involves knowing all its technical characteristics, and the advantages and disadvantages according to the chosen one.

Air compressor tank

Most air compressors work with a air storage tank, and according to the model will determine which is best suited to your needs. The larger the tank, the more air per minute can be generated.

In case of using Pneumatic tools, a tank should be chosen according to their needs, because without enough air it will not work well. If you want to use tools for painting or preparation, there are tankless compressors suitable for these tasks.


Airflow and pressure lead us to choose compressor power. Each compressor is able to guarantee a different flow and pressure.

You can calculate the air flow by adding the individual to each machine. With this sum, the theoretical maximum consumption is obtained. The general rule is that, for each horsepower, a flow of 100 liters of compressed air per minute is obtained.

Compressor power

The compressor power measurements are in horsepower (CV or HP). Compressors generally range from 1.5 hp or 5 hp. From the smallest to the largest will be indicated for domestic, professional or industrial use.

Work pressure

Most pneumatic tools or equipment do not require pressures greater than 12 bar to function properly. If these pneumatic tools are used with a lower working pressure than necessary, they will not work well.

Power supply

Air compressors can work in two different ways: electric or batteries, and with Gasoline. The best option is the electric one if it is for the home or a small workshop, while if it is for industrial use, a gasoline air compressor is better.

Compressor or self-lubricating compressor lubrication

The air always contains impurities and moisture. To use the compressor with pneumatic tools, it is necessary to clean and dry the air by filtration. In this case, it is necessary to lubricate the air with lubricating oils suitable for generators. So there are also tools with self-lubricating system included: Oil-free compressors (self-lubricating).

Air compressor noise

Compressors are usually tools that make a constant noise during use. This is important for possible adjustments and comfort while working.

Compressor connections

To connect the different accessories, they are mainly used three types of connections:

  • Plugs: ‘Female’ connection elements that can be connected to the compressor outlet, connection or hose inlet, by means of a ‘female’ thread, ‘male’ thread or by means of a tap and tweezers.
  • Connectors: The “male” connection elements are connected to the compressor outlet, connection or hose inlet, by means of “male” thread, “female” thread or by means of tap and clamp.
  • Hoses: Made of flexible plastic material to withstand the working pressure.

Choose air compressors according to your maintenance

The life of the air compressor and the quality of work are related to the quality of maintenance. The following explains the maintenance that must be performed on the compressors:

  • Follow the manufacturer’s instructions: This is a rule that we must follow with any power tool.
  • Oil level: It is always necessary to check the compressor oil level. In addition, it must be changed regularly. For this reason, there are some air compressors without the use of oil (with self-lubrication).
  • Emptying the water: The water accumulated in the boiler and in the filter must be drained with the bleeders.
  • Security control: Check the correct functioning of the boiler and the tank safety valve.
  • Clean the cooling fins: Remove dust from the fins to prevent dust accumulation.
  • Check the transmission belts: Some compressors are direct drive and it is necessary to have the drive belts correctly.
  • Clean air filter: Check that the inlet filter is correct and clean.
  • Installation on flat and well fixed ground: Always install the compressor on level ground and fix it on rubber pads to avoid vibrations.
  • Correct cooling: Leave half a meter away from the electric motor and the compressor, so that there is adequate cooling thanks to the fan.
  • Clean the guns: Good cleaning of pistols and pneumatic tools is important after use.