How Do Gas Compressors Work?

An air compressor includes an electric motor that compresses the air into a tank. The compressed air can be released at the chosen pressure when needed. How does an air compressor work? What are the criteria for selecting a suitable gas compressor? Well there are a variety of various compressor types.

Let’s continue with a summary. Usually compressors used in automation and workshops are the so-called positive displacement compressors. When air is drawn into a space and the volume of that space is reduced, here pressure is induced. For this short article we want to restrict ourselves to this kind of compressor. Let’s take a more detailed dive into the reciprocating compressor.

The crankshaft turns which moves the piston inside the cylindrical housing. An inlet valve likewise called an intake valve permits atmospheric air to get in the cylinder. This is done during a suction blow from the cylinder. The vacuum valve deflates or opens at high pressure during the pressure paddle.

When it is compressed, the air is heated up. This is an issue for every single compressor. The result is not simply a less efficient compression cycle, however likewise the danger of a real surge if any combustible compounds, such as oil or lubricants, touch with the piston and air. The pressure of a single stage compressor is limited to an output pressure of about 10 bar or 145 lbs To accomplish higher pressures, you can utilize a multi-step compressor.

In a 2 stage compressor, the big piston develops 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 accomplish pressure in excess of 20 bar or 290 psi. Multistage compressors can likewise be used with high-power water-cooled jackets to avoid getting too hot. Based upon its working principle, the reciprocating compressor offers only pulse compressed air.

This type of compressor is used in combination with a tank. However, making use of a tank offers the benefit that the compressor can be run with a two-point controller, leading to less power usage and wear.

The diaphragm compressor comes from the piston compressor family. Here the suction chamber of the piston is closed by a diaphragm. The benefit of a diaphragm compressor is the compressed air in the compression chamber does not come in contact with the piston and is oiled. Hence it can be kept without oil. These are a few examples:


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

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

When the pivot rotates, these rotors produce a chamber of numerous sizes. Air is compressed into the biggest chamber, then compressed and left in the smallest chamber. A benefit here remains in pulsed free flow in contrast to piston compressors. So an air tank might be optional. Furthermore, these compressors are relatively insensitive to dirt and quiet