Size of compressor required to fill up tanks
by RUI MARCOS
(CAPE TOWN, SOUTH AFRICA)
I have a tank at one of my clients that I have to fill up to do a soap leak test. The tank has 960.000 lts capacity of capacity. What would be the capacity of the compressor in m3/min that I need to outsource to fill up such tank in 8 hours? Please provide me with the formula if possible.
Your support is much appreciated!
Regards
Calculating PSI CFM and capacity for moving falling object
by RedCap
(California)
First of all, congratulations on a most informative site !
I inherit a project that needs to move a falling object a certain distance with compressed air controlled by air valves. I am an electronic engineer and have no air flow background.
How do I calculate how much power, PSI I need for say 500gm objects falling from rest for 400mm before reaching the valve. The object must be moved for some 300mm out of it's falling path.
The objects is about 100mm x80mm in diameter.
The installed valves have a 2mm nozzle, and can move 300l/min air at 8 bar. I have a bank of ten valves next to each other, the nozzles are 10mm apart. Thus, 8 to 10 valves can be activated at the same time for moving a 100mm x80mm object.
The electronics can control the length of the activation time of the valves.
We would like to keep the valves but can change if that's what needs to be done.
Questions: 1. How do I calculate all the relevant air parameters. 2. Nozzle size, flow, psi, total cfm's. 3. Any available formulas you can point me to ? 4. Would I need to have a receptor/storage tank to manage a continuous flow of objects that can help
?
I think this can make out a nice, complete HOWTO once we solved all these issues.
Obviously we could go for the biggest airflow and pressure but would love to optimize air consumption and thus power / generator requirements.
I would appreciate your help or any one's that have this type of background and/or knowledge.
Thanx in advance.
REDCAP ca.
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what is FAD in reciprocating compressor?
by Muhammad Nawaz
(pakistan)
if we know the suction pressure and temperature then why we find the FAD, Free air delivery shows what in compressor, is free air delivery use for suction or for delivery,
i am confused about FAD, why FAD is used, what is the purpose. i mean all concept about FAD.
Is 6 cfm low for my compressor?
by Leo
(Northern California)
I just picked up a used 33 gallon, 3HP, 2 cylinder 1979 craftsman.
Using the formula in the "Fill air tank" section, I come up about 6 cfm being delivered by this compressor.
That seems low to me considering its a 3 hp motor.
The numbers I used are: 100 psi kick in pressure, 132 psi kick out pressure, 33 gal tank, and 1 minute 25 seconds to go from 100 to132 psi.
Did I calculate correctly?
If 6 cfm is low, what could be wrong with this compressor?
Bad flapper valves, piston rings?
By the way, it takes almost 6 minutes to fill the tank when it's completely empty.
Thanks for any pointers
_________________
Well, I'm not redoing calculations as my math is really suspect.
Rule of thumb is 3-4 CFM of flow at 90 PSI for each HP of motor.
However, if your compressor is running on 120 VAC, you aren't going to be able to get a true 3 HP performance.
For issues relating to compressors that don't build pressure properly, please see the pages linked from the troubleshooting section on the sitemap page.
Bill