Compressors are very vital in most machines. The primary use of a compressor in a machine is to increase the pressure of a gas by decreasing its volume. An air compressor is a machine that functions through the use of gas engines to power a machine or device. The air compressor sucks a volume of air from the airspace, squeezing it to increase its pressure by reducing its volume, and then finally transferring the highly pressured air to a receiver tank. The air in the receiver tank is the one that is then drawn and used to power equipment. Air compressors are in different types. Here is a detailed explanation of the various types.

Types of Air Compressors

Air compressors can be divided into two major types based on their functionality. The two major types include positive displacement air compressors and dynamic air compressors.

Positive Displacement Air Compressors  

These are compressors that function through increasing the pressure of air by reducing its volume. The positive displacement air compressors types are: Rotary screw compressors 

The rotary screw compressors function by letting filtered air into the inlet of its air end, where the female and the male rotors air un mesh. The male and female rotors compress air internally, and they are oil-cooled, and the internal clearances do not have any valves. The most commonly used rotary screw air compressors include the spiral lobe oil flooded and the single-stage helical air compressors.

Reciprocating Air Compressors

These air compressors have a piston in the cylinder, which it uses as a displacing and compressing element. The reciprocating compressors are further subdivided into Single and two-stage compressors. The single-stage is used for lower pressure which ranges from 70 to 100 while the two-stage compressor is used for pressures that are above 100 to 250 PSIG.

Dynamic Air Compressors

The dynamic air compressors are another type of air compressor which also has a different function. They work by transferring energy from a rotating impeller and releases it to the air. This type of compressor includes:

Centrifugal Air Compressor

This type of air compressor works through producing very high-pressure discharge. It converts the angular momentum, which is imparted by the dynamic displacement. The centrifugal air compressor is a supertype of air compressors. The centrifugal air compressor is superior due t the fact that they rotate at a very high speed than the others producing high pressure. They are designed for higher capacity.

Scroll Compressors

This is a type of a dynamic air compressor which functions by using orbiting and stationary spirals that reduces the volume of space between them. The orbiting spirals also traces the path of the fixed spirals.Its gaseous intake occurs at the outer edge of the compressor, where the compressed gas is released near the center.

Axial Compressors

This type of air compressor has the highest capacity of delivered air. The volume ranges from over 8000 to 13 million cfm and is used in industrial machines. Unlike the centrifugal compressors, the axial compressors have very many stages and compress air at very low compression ratios.Axial compressors increase the pressure of the gas by first increasing its velocity. After, the compressor slows down, the gas through filtering it in fixed and curved blades that increase its pressure.