If you are a power tool user then you might probably know that an air compressor is the most important and the must have tool for you. Your checklist won’t be a complete one without an air compressor. If you are confused with the categories of air compressor, then this post is for you.
In this article, I am going to explain you the major two categories of a positive displacement compressors and the major differences between them.
Types Of Positive Displacement Compressors:
- Rotary screw compressors
- Reciprocating piston compressors
Rotary Screw Compressors:
This compressor features a pair of matching helical screws as the name implies. And the air inside this compressor moves through the threads as the screws rotates and it forces the air through the chamber.
The maximum operating pressure of this kind of air compressors is a single stage and hence the pressure will be lower when compared to that of the reciprocating piston air compressor.
It maximum operating pressure is 150 PSIG.
Reciprocating Piston Air Compressor:
As the name implies, this compressor uses the piston mechanism. It use a series of one way valves to push the air into the chamber. It also have a series of pistons which operates in a constant motion. This series of piston is responsible for compressing the air.
The maximum operating pressure of this kind of air compressor is of both single stage and two stage compressors.
A single stage compressor draws air into the cylinder from where it is compressed in a single piston stroke of approximately 120 PSI and then the compressed air is send to the storage tank.
Whereas in two stage compressors, it includes an additional step where the air is compressed by a second, smaller piston to a pressure of up to 175 PSI.
The maximum operating pressure of reciprocating piston is up to 500 PSIG.