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New compressor?
PekkaNF:
Old oiles italian compressor is wearing out. It has lasted over 22 years, pretty good. Now it pumps max. 3 bars and smells funny.
Now I would like to have:
* Reasonable quality, but not overy expensive.
* Floor space is important, vertical form factor is desirable
* No need to transport, but might need to move outside or around the house ocassionally, sort of semi permanent installation.
* Lowish noise level good
* Max capacity, least 2,2-3 kW, I have three phase, but three phase models seem to expensive
This would cost around 700€
CPRA 50 MV30 VS Piston compressor, I have been told that compressor is machined and manufactured in Italy. Direct drive, but low rpm.
http://tuotteet.etra.fi/en/g23869624/
This would cost around 400€, but is made in china and light weight for 90 litre tank. But compressor is belt driven. Pretty high dB value.
https://www.ikh.fi/en/compressor-230v-2-2kw-330l-90l-vertical-xt90330
These are probably painted with different names on them.
Any suggestions, recommendations or advice?
awemawson:
Why not refurbish the one that you have? Hone the bore, new rings and pistons, sort the valves (possibly just flap valves rather than car type)
Then send me the 700 euros !
ddmckee54:
Be careful of the specifications for new compressors, sometimes it seems like there is a lot more Marketing in the specs than there is Engineering - if you know what I mean.
I recently saw a YouTube by AvE about compressor ratings and it pretty much agreed with my own experience with compressors. Only my experience was with a MUCH larger compressor - 900HP and 4000cfm@100psi. Still amounted to the same BS, just bigger numbers.
Don
mattinker:
Pekka,
take it appart, see what could be done and then decide!
Regards, Matthew
PekkaNF:
--- Quote from: awemawson on June 13, 2019, 03:16:06 PM ---Why not refurbish the one that you have? Hone the bore, new rings and pistons, sort the valves (possibly just flap valves rather than car type)
Then send me the 700 euros !
--- End quote ---
--- Quote from: mattinker on June 13, 2019, 06:51:39 PM ---Pekka,
take it appart, see what could be done and then decide!
Regards, Matthew
--- End quote ---
Both suggestions (maybe excluding the sending the money part...) would be normally high on my list - and it is.
This old italian job is "oiless", it is about 1,5 kW and 20 litre tank, great for moving around, but not that great on capacity. Since it is oiless, it is not that great for refurbishment (I checked the compressor innards 10 years ago and clean up caked parts and relubricated the piston thinggy. Compressor is shot, pressure switch/valve leaks (and there is not cure but to replace it), relieve valve leaks, and original manifold/pressure regulator/couplings are shot. I would be looking some serious money to refurbish it and still would have low capacity. I am going to repurpose it though.
I need to check the tank and if that is good, I am going to mount one or two Jun-Air silent compressors to it to provide low small amount low noise compressed air, most of the time I need only a little air and assurance that I don't need to wear my brown pants when compressor kicks in. Because the tank is small, maybe I can mount it on a upper corner of the garage, where it will not take up floor space.
This new one would serve occassional and media blasting, spray painting, big nail guns and such. I prefer something that will last.
--- Quote from: ddmckee54 on June 13, 2019, 05:13:29 PM ---Be careful of the specifications for new compressors, sometimes it seems like there is a lot more Marketing in the specs than there is Engineering - if you know what I mean.
I recently saw a YouTube by AvE about compressor ratings and it pretty much agreed with my own experience with compressors. Only my experience was with a MUCH larger compressor - 900HP and 4000cfm@100psi. Still amounted to the same BS, just bigger numbers.
Don
--- End quote ---
I am aware that the numbers used to market compressors (intake air volume with no back pressure) is indicative, but not more than that. Greater insult is that compressors are sold with "free air capacity" (USA CFM) and tools are sold most often with compressed air volume :bang:
I would greatly prefer if the compressor marketeers would candidly tell the output air volume at 6/8/10 bars of tank pressure and a graph that show PV-relationship AND also the compressor duty cycle (mostly at best 50% with 10 mins on, 10 mins off with these piston compressors).
I am aware of this, I can do with this size compressor, just need to limit use and size of the tools. Impact driver is no problem, works fine with my old compressor, old compressor struggled with my paint guns, only touch up paint gun was near 100% usefull whle compressor was running less than 50% duty cycle.
Now back to OP, Does anybody has these or has experience on similar or close cousins of these new vertical compressors that are not exactly cheap, but are not near Kaiser or Atlas-Copco price?
One thing I am worried is that neither seem to have good arrangement for tank condensate removal.
My gut feeling is to gravitate towards CP "italian" compressor, it has 50 litre tank and weights the same than "chinese" compressor with 90 litre tank. That should indicate as much as manufacturing plant location.
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