How Does a Gas Compressor Work?

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

Let’s continue with an introduction. Typically compressors utilized in automation and workshops are the so-called positive displacement compressors. When air is drawn into a space and the volume of that container is minimized, here pressure is created. For this short article we wish to limit ourselves to this type of compressor. Let’s take a more detailed look at the reciprocating compressor.

The crankshaft turns which moves the piston inside the cylindrical housing. An inlet valve likewise called an intake valve enables 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 a problem for every compressor. The result is not simply a less effective compression cycle, but likewise the risk of a genuine explosion if any flammable compounds, such as oil or lubes, are in contact with the piston and air. Therefore, the pressure of a single phase compressor is limited to an output pressure of about 10 bar or 145 pounds To attain higher pressures, you can utilize a multi-step compressor.

In a two phase compressor, the large piston builds the first stage. The air that exits the first stage can now be cooled prior to going into the 2nd phase. With a two-stage compressor, you can attain pressure in excess of 20 bar or 290 psi. Multistage compressors can likewise be utilized with high-power water-cooled jackets to avoid overheating. Based on its working principle, the reciprocating compressor provides only pulse compressed air.

So this type of compressor is utilized in conjunction with a tank. The use of a tank provides the benefit that the compressor can be operated with a two-point controller, resulting in less power consumption and wear.

The diaphragm compressor comes from the piston compressor family. Here the suction chamber of the piston is shut by a diaphragm. The benefit of a diaphragm compressor is the compressed air in the compression chamber does not come into contact with the piston and is lubed. Thus it can be kept free of oil. These are a few examples:


Because versatility is limited, the weak point of a diaphragm compressor is usually its diaphragm itself. Diaphragm compressors are utilized for instance in the food industry or for filling scuba divers bottles.

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

When the pivot rotates, these rotors produce a chamber of various sizes. Air is compressed into the biggest chamber, then left and compressed in the smallest chamber. An advantage here is in pulsed free flow in contrast to piston compressors. So an air tank might be optional. In addition, these compressors are reasonably insensitive to dirt and produce litle noise

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