An air compressor pressurizes air using an electric, gas, or diesel engine. It intakes air and forces it into a high-pressure storage tank. As more air enters, the pressure within that tank increases. That compressed air is then delivered via pipes to power a huge array of tools from saws to drills to jackhammers.
We’ll go into more detail about how they work below. You can also watch this helpful video talking about how air compressors work.
How Do Air Compressors Work?
Air compressors typically work thanks to an air compressor pump, which is similar to a car engine’s piston. The piston compresses gas from a tank using an intake and an exhaust valve. This acts to create a pressure difference on either side of the piston. This pressure difference can be used to power devices such as pneumatic nail guns or air wrenches.
An air compressor is not a substitute for a pneumatic tools and some may be upset to find this when they purchase the cheap tool attachments without a compressor. These tools and compressors must be used together to provide power and get the job done. The most common purpose of an air compressor is to create a high-pressure air source for pneumatic equipment but it can also be used for the air pressure itself to blow items clean.
Are there different types?
Air compressors are available in single and two-stage models. The single-stage compressor uses only one chamber for compression, whereas the two-stage compressor has two chambers for low pressure and high pressure.
The main difference between the two is that a two-stage air compressor has an accelerator pump at the end of the low-pressure chamber that supplies compressed air to equipment through an air hose, whereas a single-stage compressor does not have a separate feed system.
How does dynamic displacement work?
Air compressors use the dynamic displacement method to increase their power output. This method involves taking a large volume of air, compressing it, and releasing it into a smaller space. After being compressed, the air moves with more power due to the higher pressure.
How does positive displacement work?
Positive displacement compressors take a large volume of air, compress it using a piston and cylinder, then remove the compressed air from the cylinder. This method allows for increased pressure despite removing more air than is replacing it.
Is there a difference between a pump and a compressor?
There is a fundamental difference between a pump and a compressor. The differences include;
- Compressors have an air compressor pump, whereas pumps use a motor to do the compressing.
- Pumps are usually stationary and compress air that is used by a device, while compressors can be used to transfer air between two separate devices.
- A higher pumping speed is required for pumps as compared to compressors, so the pump needs to create more force to move more fluid at the same speed.
- Pumps rarely produce high-pressure levels, but most compressors can produce pressures of 5 – 75 kPa (i.e. 5 – 75 bar), depending on their capacity.
- Compressors usually have an outlet pressure gauge for checking the pressure produced.
- Compressors are used to control and maintain constant pressure, while pumps are used to move fluids.
Air compressors are very useful in a wide variety of industries, from construction to manufacturing.
They are used to power different types of equipment. A small air compressor is usually enough for home or personal use, while large air compressors are necessary for industrial use. When buying an air compressor, look for details such as the maximum pressure and volume tanks that the compressor can hold.
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