22 Mar

How does an Air Compressor work?

An air compressor consists of an electric motor that compresses the air into a tank. When needed, the compressed air can be expelled at the selected pressure. How does an air compressor work? What are the requirements for selecting a suitable gas compressor? Well there are a variety of various compressor types.

Let’s continue with an overview. Typically compressors used in automation and workshops are the so-called plus displacement compressors. Here pressure is induced when gas is drawn into a space and the volume of that space is minimized. For this short article we wish to restrict ourselves to this type of compressor. Let’s take a closer dive into the reciprocating compressor.

The crankshaft turns which moves the piston inside the cylindrical housing. An inlet valve likewise called an intake valve allows fresh air to go into the cylinder. This is done throughout a suction blow from the cylinder. The vacuum valve opens or deflates at high pressure throughout the pressure paddle.

The air is heated when it is compressed. This is an issue for each compressor. The outcome is not simply a less efficient compression cycle, however likewise the risk of a genuine explosion if any flammable compounds, such as oil or lubes, are in contact with the piston and air. The pressure of a single stage compressor is restricted to an output pressure of about 10 bar or 145 lbs To attain greater pressures, you can utilize a multi-step compressor.

In a 2 stage compressor, the large piston builds the first stage. The air that exits the first stage can now be cooled before getting in the 2nd stage. With a two-stage compressor, you can attain pressure in excess of 20 bar or 290 psi. Multistage compressors can likewise be used with high-power water-cooled jackets to prevent overheating. Based upon its working principle, the reciprocating compressor supplies only pulse compressed air.

So this type of compressor is used in conjunction with a tank. However, the use of a tank supplies the advantage that the compressor can be operated with a two-point controller, leading to less power consumption and wear.

The diaphragm compressor belongs to the piston compressor family. Here the suction chamber of the piston is closed by a diaphragm. The advantage of a diaphragm compressor is the compressed air in the compression chamber does not come into contact with the piston and is lubricated. Thus it can be kept devoid of oil. Here are some examples:


The main issue of a diaphragm compressor is usually its diaphragm itself because versatility is restricted. Diaphragm compressors are used for instance in the food industry or for filling divers bottles.

The working principle is totally unique from the so-called rotary compressor, which is likewise called a vane compressor. A normal rotary compressor has a round housing. Adjustable rotors with their center point on the drive shaft are linked to the housing.

So when the pivot rotates, these rotors create a chamber of various sizes. Air is compressed into the largest chamber, then left and compressed in the smallest chamber. An advantage here is in pulsed free flow in contrast to piston compressors. An air tank might be optional. Additionally, these compressors are low noise and fairly insensitive to dirt.

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