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Old 07-28-2010, 05:01 PM
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Wet_Boots Wet_Boots is offline
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Join Date: Mar 2005
Location: metro NYC
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Grainger has a line or two of compressor pumps, and they probably still offer Ingersoll Rand pumps. The IR pumps will be heavyweights, with head unloaders. Grainger's own pumps might not have head unloaders in the smaller sizes. There's a general rule of thumb for selecting a gasoline engine to match up with a pump meant for a certain size electric motor, which is to multiply the electric motor horsepower by approximately two. The pumps on those units you shopped are probably meant for 5 HP electric motors.
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