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Old 12-30-2008, 09:09 AM
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i am trying to run a 10 cfm tool @ 90 psi.i have a choice between two is 15cm @ 90 with a 60 gallon tank and is a single stage pump max 135 psi.the other is 12.6 @ 90 psi but is a two stage pump up to 175 psi. with and 80 gallon tank.which would be better and this is not just a math question i am going to buy compressor this week.i just do not want to buy the wrong one and then not be happy with it thanks

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Old 12-30-2008, 10:08 AM
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Lots of threads here about compressors. You might want to take a look at the "Knowledge Base" as well as doing a search in this forum. Why? The information you provided is not all that is needed to make a good evaluation and comparison.
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Old 12-31-2008, 04:10 PM
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larger tank= longer time to refill tank and longer time between pump 'ons'.
smaller tank= opposite of above.

oil free compressor= no attention needed, just run it. Louder than a straightpiped musclecar, and it's not nearly as good sounding.
oil compressor= use non detergent oil in it, runs cooler and quieter than the above. Change oil every so often, which is a small price to pay for not going deaf.

Are you going to use the 175psi of air? 135 seems a lot more reasonable. My compressor (ancient old westinghouse motor, old commercial refridgeration pump, 1960s? speedaire tank) pumps to 80-90psi and I'm happy with it. Runs quiet, and refills in a couple of minutes. Stays cool as well after running for long durations (estimated 100% duty cycle) too!
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Old 01-01-2009, 08:56 AM
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The dual stage compressors usually fair better during long duty cycle runs.

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