A Guide To Selecting An Air Compressor

Folks frequently get bewildered about choosing the proper air compressor to operate their tools

. Basically, there are various aspects you need to look at when choosing an air compressor for your garage or store.

Lets look at these elements:

1. Hp rating

Most people are of the opinion that the higher the hp, the better is the air compressor. But, all horse power ratings aren't equal and may even be misrepresented. For instance, when you visit a hardware store to purchase a 6 horse power air compressor, you see one that's priced really cheap. So, why is 6 horse power industrial unit so expensive? Well, 6 horse power is 6 hp, right? Not always, because when selecting an air compressor, you have to see the power that the air compressor draws. If if needs 15 amps from a 110 volts circuit, then you are actually getting around 2 hp. So, the 6 horse power rating on the compressor is inflated.

If you want to generate 6 horse power, you would require a minimum of 24 amps from a 220 volts circuit. For that reason, if you're considering a 6 hp electric compressor, you should buy a industrial compressor, rather than purchasing a cheaper unit from a hardware store.

2. How much PSI will you need?

For all newcomers, PSI means pounds per square inch and most of the compressors in the US are rated in this way. In the EU, they are measured in bar. When picking an air compressor, you may want to settle for 90 PSI for correct operation. Even so, still you'd have to have a air compressor that has greater shut-off pressure. Air compressors in hardware stores are single-stage and have a shut off at around 126-135 PSI. All light duty air compressors shut off at around 100 PSI and so are acceptable for light duty garage use. However, if you're going to use power tools, then more is certainly better. A lot of the industrial air compressors are two-stage, which is they build up the shut-off pressure in two separate stages. The first stage builds up at around 90 PSI and the second state builds it to 175 PSI.

3. CFM

CFM (Cubic Feet per Minute), is a measurement of volume, which is the amount of air that's being moved. Air tools need certain volume of air to run efficiently. Though every manufacturer tries to impress that his item provides higher CRM ratings at various pressures, your actual concern when selecting an air compressor ought to be on how much you'd get at 90 PSI since this is what most of the air tools require for effective operation.

4. Tank size

The tank size of air compressor is expressed in US gallons. Many people get confused about the right tank size when picking an air compressor. Firstly, you should not confuse a big tank with increased run time for your air tools. If tools are used occasionally, then a large tank is good. However, if you would need to use your tools continuously, you'd do better with a small tank and large enough motor and pump. This will make sure that you wont run out of air.

Now you can easily choose an air compressor armed with this helpful information. Lastly, you have to determine what you are going to use your air compressor for and choose an appropriate model.

by: Tyrone e clark

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