I just acquired an 60 gallon air compressor. It's extremely loud from the intake, so I plumed in a 1/2" 90 and 1/2" pvc pipe 1.5' long outside. Works great I can now hear myself think while in the garage. My question is, am I suffocating the compressor by doing that? I don't want to overheat it and wreck it.
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Air compressor intake
- Thread starter tweeder
- Start date
NancysToy
Motorbike Professor
That's a pretty small air intake. The only way to calculate the size needed would include knowing the compressor displacement and compressor (not motor) rpm. A good seat of the pants measure would be to compare the time it takes to pump up to shut-off pressure. If it takes longer than without your piping, the intake is restricted.
Ok, I'll try that. As for the intake size, the filter is right on the side of the head. I unbolted the two bolts and removed it and there was an opening for a 1/2" pipe. So I kept the same size opening but changed the distance the air would have to travel, which I think could cause it a harder time to breathe. It would be like breathing from 6" straw vs a 12" long straw, it would take more effort.
NancysToy
Motorbike Professor
You are right that there is additional loss of flow and loss of pressure the longer a pipe is. This is due to what they call friction head...but it is far less significant with a gas like air than with a fluid such as water. I doubt a short increase in intake length will kill you, but it would pay to check.
IGETAROUND
Active member
Last I remembered it was somewhere along the
[h=1]Poiseuille's Law Calculation[/h]
Pressure DifferenceXRadius to the 4th power
Volume Flowrate=_______________________
8/pi X Length
the above is only applicable to laminar flow; so when you put in 90 degree elbows, laminar flow becomes turbulent.
The short version of this is that if the intake to the compressor is 1/2" then if you're going to make the air travel a length of pipe you need the pipe to be larger than the final intake track. Note that Scotty alluded to the same thing by suggesting timing the time it takes to come to working pressure, with and without the length of pipe.
He said it MUCH easier and more clearly than this long version. LOL
[h=1]Poiseuille's Law Calculation[/h]
Pressure DifferenceXRadius to the 4th power
Volume Flowrate=_______________________
8/pi X Length
the above is only applicable to laminar flow; so when you put in 90 degree elbows, laminar flow becomes turbulent.
The short version of this is that if the intake to the compressor is 1/2" then if you're going to make the air travel a length of pipe you need the pipe to be larger than the final intake track. Note that Scotty alluded to the same thing by suggesting timing the time it takes to come to working pressure, with and without the length of pipe.
He said it MUCH easier and more clearly than this long version. LOL
NancysToy
Motorbike Professor
I wouldn't worry about it too much. Your compressor will wear a little more quickly, but this is not commercial use, so it should last you about forever. Another thing you could do is use a reducer coupling, increasing the pipe size to 3/4" or better. that would reduce your friction loss.
That though crossed my mind earlier, I think I'll go that route just to be on the safe side. Thanks for y'alls help.
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