cfm calculation
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cfm calculation
I am wondering how to calculate CFM for compressors. If i have a compressor that delivers 11.5 cfm at 40 psi and 10.2 cfm at 90 psi then what is the cfm at 23 psi?
I'm really hoping that this compressor will work for some HVLP guns...
I'm really hoping that this compressor will work for some HVLP guns...
Cargo Master
Joined: Dec 2004
Posts: 2,232
Likes: 3
From: NE Texas
I don't know how you would calculate it, but it will be VERY close to the 11.5 number. There are many guns that will work at 11.5, but the very best ones won't unless you are doing panel work, rather than a complete paint job.
If you are looking for an economy gun, or a Mini gun there will be plenty that will fall into this area. If you are looking to run a high end SATA or something, then you will need more air. Do you have a smaller compressor that you could temporarily TEE together with the big one to add that couple of extra CFM that would run a SATA?
What gun do you have your eye on?
I ganged a 10.2 @ 90 together with a 6.2 @ 90 so that I can run a SATA type gun.
I know this is not the answer you were looking for, but I hope it helps.
If you are looking for an economy gun, or a Mini gun there will be plenty that will fall into this area. If you are looking to run a high end SATA or something, then you will need more air. Do you have a smaller compressor that you could temporarily TEE together with the big one to add that couple of extra CFM that would run a SATA?
What gun do you have your eye on?
I ganged a 10.2 @ 90 together with a 6.2 @ 90 so that I can run a SATA type gun.
I know this is not the answer you were looking for, but I hope it helps.
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Joined: Sep 2007
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Originally Posted by MBDiagMan
I don't know how you would calculate it, but it will be VERY close to the 11.5 number. There are many guns that will work at 11.5, but the very best ones won't unless you are doing panel work, rather than a complete paint job.
If you are looking for an economy gun, or a Mini gun there will be plenty that will fall into this area. If you are looking to run a high end SATA or something, then you will need more air. Do you have a smaller compressor that you could temporarily TEE together with the big one to add that couple of extra CFM that would run a SATA?
What gun do you have your eye on?
I ganged a 10.2 @ 90 together with a 6.2 @ 90 so that I can run a SATA type gun.
I know this is not the answer you were looking for, but I hope it helps.
If you are looking for an economy gun, or a Mini gun there will be plenty that will fall into this area. If you are looking to run a high end SATA or something, then you will need more air. Do you have a smaller compressor that you could temporarily TEE together with the big one to add that couple of extra CFM that would run a SATA?
What gun do you have your eye on?
I ganged a 10.2 @ 90 together with a 6.2 @ 90 so that I can run a SATA type gun.
I know this is not the answer you were looking for, but I hope it helps.
Cargo Master
Joined: Dec 2004
Posts: 2,232
Likes: 3
From: NE Texas
It sounds as if we are in the exact same situation. Read my thread entitled "Ganging Two Compressors Together?" Due to limited floor space in my shop, but not much limit to wall space, I built a platform to hang my 20 gallon, 2HP compressor on the wall above my 3.2HP compressor that is probably just like yours. I then ran black pipe with proper condensation drains and risers to allow for DRY as well as adequate volume of air. I now have enough air to run a SATA or whatever I want, and it's DRY air.
I too really wanted to buy an IR Type 30 and have a big compressor that would last the rest of my life, but for a LOT less money, I now have enough air and a very good dry air plumbing system as well.
BTW, don't plan on 12CFM @ 23PSI out of your compressor. Do a little work and plumb your compressors together. With a ball valve at the output of each compressor, you can run one of them for regular needs and then only turn on both and open the ball valves to both when your painting or blasting.
Go to TPTools.com and poke around on their website to find their write up on how to properly plumb an air system.
I too really wanted to buy an IR Type 30 and have a big compressor that would last the rest of my life, but for a LOT less money, I now have enough air and a very good dry air plumbing system as well.
BTW, don't plan on 12CFM @ 23PSI out of your compressor. Do a little work and plumb your compressors together. With a ball valve at the output of each compressor, you can run one of them for regular needs and then only turn on both and open the ball valves to both when your painting or blasting.
Go to TPTools.com and poke around on their website to find their write up on how to properly plumb an air system.
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