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Kellogg American 321 Compressor Pump cfm?


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  #1  
Old 03-28-2018, 11:06:26 AM
skindaddy skindaddy is offline
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Default Kellogg American 321 Compressor Pump cfm?

i have a pump number 321 compressor that was given to me, and before i put money into rebuilding it( even though i have it tore down) does anyone know how i can find out the cfm output of it? would like to see if it will meet my requirements! i've got a feeling its only around like 8 @ 90psi which wont be enough for the money i'm thinking.
it came with a 5hp 230v motor 1750 rpm, unit was altogether and running when received it, although had not run much in years.
was getting oil blow by into the lines.
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Old 03-28-2018, 12:35:39 PM
K-Tron K-Tron is offline
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Default Re: Kellogg American 321 Compressor Pump cfm?

The Kellogg 321 pump is a 2hp compressor, it has a maximum cfm rating of 8.8cfm @ 825rpm. If the 5hp motor was overspeeding that compressor, it may be too far gone to justify a rebuild. There are many more larger and better compressors out there. What sort of application are you looking to build a compressor for? I'd suggest looking into some older Quincy QR-25 series compressors. They are/have been the industrial workhorse for fifty plus years.

Chris
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Old 03-28-2018, 01:17:49 PM
Vanman Vanman is offline
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Default Re: Kellogg American 321 Compressor Pump cfm?

Check the motor pulley size to see how fast it was running. I'd bet they just stuck that 5 hp motor on it because they had it handy, and didn't actually change the pulley size. As long as it hasn't thrown a rod, it's probably fine?

I have a 5 hp 332 and a 10 hp 352 Kellogg and have been wanting a 321 for a very long time. It is very nice to have a smaller compressor for when not a lot of air is needed, that way your pump does not get ruined by condensation from not running long enough and thus not getting hot enough.

Check this link:
http://www.aircompeq.com/ka.htm
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Old 03-28-2018, 01:24:20 PM
skindaddy skindaddy is offline
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Default Re: Kellogg American 321 Compressor Pump cfm?

would the HP matter if it was still turning the correct rpm's? i actually dont know what they would be though. i also see ratings at 175psi too?
we just use it in our pole barn, impacts, grinders, on a rare occasion paint sprayer, alot of air blow nozzles. thinking would like something around 10cfm @ 90 or higher without blowing the bank.
yes if i completely rebuilt it rings,valve, 2 valves i broke, gaskets, rod bearings prob looking at about $150 to 175.

thanks again for the help

---------- Post added at 01:24:20 PM ---------- Previous post was at 01:20:01 PM ----------

oh also the one we have now i think puts out between 6 & 7 cfm and it is not enough for the impact alone you have to wait for air to increase for a minute at times.

next post
ok i will check pulley measurement tonight.
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Old 03-28-2018, 03:08:00 PM
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John Newman Jr. John Newman Jr. is offline
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Default Re: Kellogg American 321 Compressor Pump cfm?

Long hose runs will severely limit / restrict air flow. My compressor is at the back of the shop and when I use an impact at the other end of the building, I had a noticeable drop off in performance. I added an aux tank at the front of the shop to maintain steady pressure and increase my total volume and have had no problems since.
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Old 03-28-2018, 11:04:42 PM
ronm ronm is offline
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Default Re: Kellogg American 321 Compressor Pump cfm?

Quote:
Originally Posted by skindaddy View Post
[/COLOR]oh also the one we have now i think puts out between 6 & 7 cfm and it is not enough for the impact alone you have to wait for air to increase for a minute at times.
Use both of them. Set one to cut in at a little lower pressure than the other, you'll have 15 CFM if you need it, only the smaller one running if you're not using much air.
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Old 03-29-2018, 12:25:17 AM
Vanman Vanman is offline
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Default Re: Kellogg American 321 Compressor Pump cfm?

That's a good idea, though I think I'd install manual controls to avoid running one of the pumps for only a short period.

The reason I say this is that I trashed the wrist pin bearing in the second stage cylinder on my Kellogg because, even with an 80 gallon tank, I wasn't typically running it hard enough to get it hot enough to avoid condensation in the second stage.
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