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Another air compressor thread

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Rideit

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Apr 25, 2022
Messages
7
Hi folks,

After hours of reading, I still don't know which compressor to get. I live in a small island at Portugal and can't find anyone here to guide me.

I need it for die grinders, angle grinders, impact guns, sand blaster cabinet so, fairly high CFM. The problem is I'm limited to 230v (single phase) and a budget of 1500USD. I prefer a vertical compressor.

With this specs I selected two european brands - FINI and ABAC.

For 230v, the strongest pumps they have are ~350-400liter/min or 12-14CFM.

I have two options for ~1500USD:
1) Connect 2x FINI MK-103-90V-3M, single-stage belt motor 2200w with 3Hp, 90liters (24gal), which will result on 180liters (48gal), 26CFM

Compressore Fini MK 103-90V-3M - in vendita su Macchinato

Acquista su Macchinato Compressore Fini MK 103-90V-3M al miglior prezzo sul web. Sconti e offerte sempre attive. Approfittane subito!
www.macchinato.com www.macchinato.com

2) 1x ABAC PRO A39B 150 VM3, two-stage belt motor 2200W with 3HP, 150liters (40gal), 14CFM

Compressore Abac PRO A39B 150 VM3 + MAC - PLUS - in vendita su Macchinato

Acquista su Macchinato Compressore Abac PRO A39B 150 VM3 + MAC - PLUS - al miglior prezzo sul web. Sconti e offerte sempre attive. Approfittane subito!
www.macchinato.com www.macchinato.com

None is the perfect solution, but it's the best I can get with 230v. Which one is the best?

Other advise welcome.

Nuno
 
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R

Rideit

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Apr 25, 2022
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Why? Because two stage runs cooler?

Can't see any other positive, because both have the same max pressure and connecting two of the single stages, I'll double the CFM.
 
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R

Rideit

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Joined
Apr 25, 2022
Messages
7
"A two stage compressor pushes the air through and compresses it like a single stage except the air passes through to a second cylinder where it is compressed and pressurized to a higher pressure before making its way into the storage tank. By delivering higher PSI air into the storage tank it will give your air tools a higher overall running pressure which is good for air driven tools that have a high PSI or CFM rating like blast cabinets, paint guns, etc."

Both compressores run at a maximum of 10bar so, as I said, this is not a plus.
 
R

ro_marcone

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Oct 6, 2021
Messages
6
The Fini is exactly the same as the Stanley Fatmax B 350/10/90V.
Manufactured in China by FNA, bought one myself some years back as I needed a mobile, oiled, vertical air compressor that does not occupy allot of space. Haven't used it much, it did come with a kink in the hose connection to the decompression valve so I had to re-route it.
Needless to say choices are very limited for you, mainly because of the single phase power. Maybe buy a bigger 3 phase model and use it with a VFD?
 
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R

Rideit

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Joined
Apr 25, 2022
Messages
7
I'm not sure it is. The tank is the same, but the rated CFM is 330 l/min. Fini is 365l/min. Nuair has one too. Nowadays I always have a feeling i'm buying a pig in a poke. Everything comes from the East.

www.nuair.pl

Vertical compressor Nuair 90 ltr with belt drive

Vertical compressor NUAIR 90 ltr tank and B2800B belt driven pump. Easily transportable thanks to wide handle with rubber grip and large wheels. Controls easy to read. B2800B pump with cast iron cylindre makes this compressor working perfect and last. VERTICAL CONFIGURATION - the same air...
www.nuair.pl

Never heard of VFD, but I guess that's the answer! Buying 7.5hp 80 gal with 29,7 CFM!! Thanks!!

Compressore trifase Fini BK 119-270V-7,5 - in vendita su Macchinato

Acquista su Macchinato Compressore trifase Fini BK 119-270V-7,5 al miglior prezzo sul web. Sconti e offerte sempre attive. Approfittane subito!
www.macchinato.com www.macchinato.com
 
R

ro_marcone

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Joined
Oct 6, 2021
Messages
6
It could be that the Fini it's using a slightly improved pump design, but the rest is exactly the same. Totally agree with you, nowadays most tools are just rebrands of a generic, Chinese product, the only variables are brand, color and price.

Your new choice looks like a beast, much more suited for your needs. Just make sure you have the power to spin it. It will require a 32A single phase outlet to power it, the standard 16A won't do it. https://i0.wp.com/electric-star.com...einforced-outlet-for-ev.jpg?fit=800,800&ssl=1
As for VFD, it's basically an electronic box converting single phase to 3 phase with variable frequency, so you will be able to control the speed of the motor. And there's no motor power loss at all compared to adding capacitors to three phase motors in order to run on single phase. Only downside is price.
 
C

Citation

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Jan 20, 2016
Messages
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Location
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I believe the primary advantage of a two stage compressor is that you can cool the air between stages. It's been a long time since I've looked at my thermodynamic tables but I think that cooling makes the overall compressor more efficient. Most here aren't going to notice a power difference. The other advantage is the discharged air comes out cooler. That does mater as once the air gets into the tank it will cool down. As it does so the tank pressure will drop. Sometimes you see this in questions like, "my compressor shut off at 150psi then over the next hour dropped to 140 psi. It didn't drop after that. What's wrong?" What happened is the pump shut off at 150 psi but the tank air temperature was, perhaps 120F (note that your pump air discharge temp is well over 200F). When it cools down to 80F you will have lost 10 psi. So even though you pressurized things up to 150, you actually lose some of that pressure as the air simply cools down. Finally, with big, slow turning compressors, the two stages better distribute the load on the motor. Instead of one big compression cycle per pump revolution, you have two smaller cycles out of phase with one another. Note that this last advantage would apply to a single stage, multi-cylinder pump as well. Both single stage twin cylinders and two stage, two cylinder pumps distribute the torque load more evenly than a big single stage pump.
 
M

marinusdees

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Oct 30, 2012
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Location
Edgewood, Washington
Rideit said:
I'm not sure it is. The tank is the same, but the rated CFM is 330 l/min. Fini is 365l/min. Nuair has one too. Nowadays I always have a feeling i'm buying a pig in a poke. Everything comes from the East.

www.nuair.pl

Vertical compressor Nuair 90 ltr with belt drive

Vertical compressor NUAIR 90 ltr tank and B2800B belt driven pump. Easily transportable thanks to wide handle with rubber grip and large wheels. Controls easy to read. B2800B pump with cast iron cylindre makes this compressor working perfect and last. VERTICAL CONFIGURATION - the same air...
www.nuair.pl

Never heard of VFD, but I guess that's the answer! Buying 7.5hp 80 gal with 29,7 CFM!! Thanks!!

Compressore trifase Fini BK 119-270V-7,5 - in vendita su Macchinato

Acquista su Macchinato Compressore trifase Fini BK 119-270V-7,5 al miglior prezzo sul web. Sconti e offerte sempre attive. Approfittane subito!
www.macchinato.com www.macchinato.com
Click to expand...
Personally, I wouldn't essay to run a compressor off a VFD. I'd buy the two stage single phase. It's oil-filled, I don't see a problem.
 
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