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Old 01-29-2011, 05:22 PM
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old compressor info needed

I've had this old compressor for awhile:
Champion Pneumatic Machinery Corp Model C A W
three cylinder, two stage.


The motor that was on it when I got it burned out 5 years ago, and I'm just getting around to doing something with it. Does anybody know where I can get info? Champion Pneumatic doesn't even have parts for it. I'm looking for such info as:
What rpm should I be running it at?
How much power am I gonna need?
What's a ballpark cfm expectation?
Are there rebuild parts available?

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Old 01-29-2011, 05:39 PM
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there are a few parts on E bay right now. just search: Champion Compressor

There were some jugs and crankcases. The jugs looked interchangable.
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Old 01-29-2011, 06:13 PM
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Jugs are all fine, reeds are all intact, even all the rings look good, even tho' 4 of the 6 compression rings are varnished in. Bores look like they just need a light reaming. I'm more concerned about the bearings, but I can find industrial bearings that will replace. I'm more concerned with the first two questions:
Anybody know how to find out how much power I'm gonna need, and what rpm range I should keep it in?
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Old 01-29-2011, 07:16 PM
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I assume you do not have the old motor that you could get some info off of?

Figure out the displacement the same way you would with an engine? Or find a compressor pump with similar bore and stroke, and match the electric motor to that compressor. You might be able to find specifications on pumps and complete compressors by going to the Grainger website.
Here is the first compressor pump page of three:
http://www.grainger.com/Grainger/air...log/N-aeq/No-0

It really would not hurt the compressor to run it slower, it will not put out as much air, but the compressor will run cooler. It will take more power to run it faster.
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Old 01-29-2011, 08:21 PM
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Good resource! Thanks. They list a Champion 3 cylinder, but it's a single stage. Mine's set up as a two-stage, but it's the same bore and stroke, along with the other dimensions. Seems I shouldn't spin it faster than ~1000 rpm. It's the power rating that puzzles me. Are these pumps rated hp@pump rpm? That is, if a pump is rated for 3hp, and is rated to run @ 995 rpm, will a 1.5hp @ 3450rpm motor with a 3.5/1 reduction be sufficient power?
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Old 01-29-2011, 09:10 PM
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"That is, if a pump is rated for 3hp, and is rated to run @ 995 rpm, will a 1.5hp @ 3450rpm motor with a 3.5/1 reduction be sufficient power?"

3450 RPM / 3.5 = 985.714 RPM. 3 HP is half of 1.5. I would expect half the power only be able to turn the compressor at about 500 RPM.
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