What is PSI and CFM In Air Compressor?

You need to know all about PSI and CFM to get a best air compressor. That is because those are important terms. The PSI stands for pounds per square inch. Besides, the CFM is the cubic feet per minute. For more to know about air compressor, there is an air compressor agency I have linked.

What Is PSI?

PSI and CFM In Air Compressor

The PSI stands for pounds per square inch, which is considered the English unit of measure for pressure. It refers the measure the air force delivered by the air compressor. Now, the vast majority of the air tools require PSI of 40 or 90 to get the job done. It is an important thing that you guys need to consider before getting it.

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Why Is PSI Important to Get an Air Compressor?

Like I said that the PSI means the pounds per square inch. It is an essential factor that you guys need to consider before buying a compressor. However, portable air compressor requires 0 to 5 cubic feet per minute at 70 to 90 pounds per square inch. But, larger tools connected to stationary systems require exceeding ten cubic feet per minute at 100 to 120 pound per square inch.

It is an essential factor because if the PSI is perfect, you would be able to use it properly and do your job with it. So, before buying an air compressor, make sure you guys have checked the PSI of that compressor.

What Is CFM?

The CFM stands for cubic feet per minute. It is used to measure the flow rate of air pushed out by a compressor. It’s also known as CMF or ACMF for average CMF. It is also an important thing that you guys need to consider before getting an air compressor. It relates to the suitability of a compressor for a given application. Let me give you guys an example, some tools are continuous-demand appliances and may require high CMF Illustrations might include pressure washers or saws.

Why Check CMF Before Buying an Air Compressor?

The CMF is a measure of volumetric flow. It is an important factor for an air compressor that you all need to care about. It depends on the PSI of the compressor. That means two tools with different PSI won’t necessarily have CFMs that you can simply add together that is what you want to be able to do. Don’t get it? See the below points so that you can get it easily.

  • You can look for or ask about Standard CFM (SCFM) when evaluating compressors. Now, the Standard CFM is measured as 14.5 PSIA, at 68 °F (20 °C), with 0% relative humidity. But, if you choose not to use SCFM, be sure to use CFM numbers that are all pegged at the same PSI.
  • At the time you all got the SCFM of all your air tools that you’ll be using simultaneously, you have to add up their SCFMs, then add 30% to that as a safety buffer. It will give you the maximum required CFM usage that you’ll need to complete the job. To choose an air compressor, you need to get close to this number so that you don’t waste time with a too-small unit or waste money on a too-large one.
  • Let me give you guys an example, that you’re using a grease gun (~4 CFM @ 90 PSI), framing nailer (~2 CFM @ 90 PSI), and dual sander (~11 CFM @ 90 PSI) at approximately the same time. Add all the CFMs to get 17 CFM @ 90 psi as your max required CFM.

What Is the Difference Between PSI and CFM?

Let me tell you the difference between PSI and CFM. The PSI stands for pounds per square inch, which is an amount of force delivered by the air compressor. On the other hand, the CFM is cubic feet per minute are a delivery rate. Regarding how a pneumatic tools works, the greater the PSI, the harder the tool will drive and greater the CMF the faster the tool will work.

So, the PSI and CFM are vital terms that are related to air compressors. You need to make sure to check those of any air compressor before buying one. I hope this post was useful for you all. If you have any question, ask me in the comment.

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