I’m going to be upgrading to a larger rotary air compressor unit to support the larger CNC when I get it up and running and am looking to sell of this older reciprocating unit. Don’t really need to sell it, but it is taking up some storage space that’s more valuable to me at the moment. Built in 1996, compressors refurbished in 2004, it’s still running very strong and would be quite an upgrade to anyone here.
It’s a Curtis 6DG twin-head, 2 stage-triple cylinder horizontal tank compressor unit. That’s TWO, three cylinder compressor heads on it of which both are a two stage configuration for quieter more efficient operation.
It’s a 60 gallon horizontal tank and despite the dust in the pictures it’s in VGC. Minor paint chips here and there, little surface rust up near the dryer due to condensation from that unit in the colder months. It has a full circuit panel wire with appropriate breakers. On top is an SPX Haknison dryer unit that provides perfectly dry air to the shop, especially beneficial to anyone using it for automotive painting, or in my case, cnc pneumatic equipment(CNC spindle motor cooling, pneumatic clamping rams, etc) but is just as good for any type of air tool as there is no water in it when the dryer is running.
It is powered by two independent three phase 1hp motors and is VERY efficient. If you do not have three phase power at your place then you can either by an inverter, or (recommended) replace the motors with single phase motors which can be purchased new or used across Ebay or from Graingers…I have an account there if you wish to go that route. Run them at 220v for best efficiency. You could easily sell the three phase motors on ebay and pay for the single phase units. I have not even looked to see if the existing motors can be rewired for 1phz, quite a few can just depends on the windings inside. IIRC, is ~10CFM per compressor head @80PSIG(Rated to 150psig ), it’s alot of airflow when needed. It’s not an overly large unit either, rough specs ~5 feet long x ~20-22" wide x `5.5 feet to the top of the dryer(~4’ without it), so it should fit and take up minimal space in most garages or shops
The motors can be staged, so that only one comes on when demand is low and if the tank volume starts dropping rapidly the second can be set to come on at a lower pressure, or linked to come on simultaneously. They operate of independent pressure switches so it’s user defined.
New, this compressor cost over $4K as setup back then, new now there over 6K. I’d like to get $1200 for it now. Price is quite reasonable considering a cheap generic compressor these days will run you $800-1200 alone not including a dryer.
Some pictures of it. It’s been in the back awhile, so I can pull it out later and take better pictures once I clean the dust off it. Picture quality is poor as they were taken on the droid as I was leaving tonight.
