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Old 12-12-2016, 07:43 PM   #1
chevota84
 
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Air compressor

I've been doing some research for a friend of mine, he's been running 3 5hp Guangzhou Charlie compressors in series and he's tired of them blowing up. We were looking at getting one commercial grade compressor to run the whole setup, problem is, he's limited to single phase. The only company I've found that offers a reasonable single phase compressor big enough is Eaton. Does anybody have any experience with them?

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Old 12-12-2016, 08:14 PM   #2
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I've been running a 2 stage 7.5HP single phase emax for a few years now with no complaints. Low RPM keeps the noise down.
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Old 12-12-2016, 09:22 PM   #3
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Is emax another name Eaton uses? The literature reads exactly the same but it doesn't say Eaton anywhere.

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Old 12-12-2016, 09:35 PM   #4
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We bought a 80 gallon Ingersoll to get up and running over a year ago from tractor supply. Planned to upgrade and frankly haven't needed to. $1000. Use it all day every day with a lot of media blasting and air tool usage. It keeps trucking and I never have to let it catch up.


I wanted to go the big bad commercial route myself but honestly if and when we have an issue I will go 5 miles down the road and spend the $1000 for another. Zero down time and relatively cheap compared to commercial service calls or down time waiting on parts.

We had several screw compressor at previous jobs and they were disasters. People seem to get along with them and love them elsewhere but we had 4 and none of them were reliable. We were waiting a week at a time for parts that may or may not fix problems.

Whatever route he wants to go service and parts is a big factor.
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Old 12-12-2016, 09:46 PM   #5
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Yeah, I think a screw type is out of the question anyway because of price. I'm figuring the 3 China compressors are in the 12cfm at 90 psi range so he'd need to be 35 cfm plus to replace all 3. That flow level steps you up into the commercial range anyway so might as well get a good one.

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Last edited by chevota84; 12-12-2016 at 09:47 PM.
 
Old 12-12-2016, 10:19 PM   #6
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What are your air demands in the shop ?..I plumbed a big propane tank in line with a big red ( Snap-On ) 8 hp 2 stg single phase, turned a 80 gal. tank in to a 200 + . we run a lot of air hogging tools and having the extra air storage made a big difference, like Z said the big commercial ones are nice, expensive and unless your running spray booths and 3 bays the cheaper ones are a good way to go. storage volume goes a long way with keeping up with the cfm's, line size helps also, all our 's where 1" going to 3/4 drops,
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Old 12-13-2016, 01:59 AM   #7
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Fab shop, they build water trucks. 15 guys I think, 2 plasma cutters, painting and air sanders plus impacts and stuff. The 3 5hp barely keep up and run almost constantly , I'm figuring 12cfm at 90psi per compressor but that's China rating so a good 30cfm unit might do more. He's been replacing about 1 compressor head a year so if a $2500 commercial will do the job and last 4-5 years it'll pay for itself. I'm sure 1 10hp will be cheaper to run than 3 fives too.

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Old 12-13-2016, 06:54 AM   #8
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Tell him to get a good phase converter for $1000 and it opens up a much much bigger realm of compressor options. 3 phase compressors can go for next to nothing at auctions.
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Old 12-13-2016, 07:04 AM   #9
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Yeah, I've bought 2- 7.5hp, a 10hp, and a 20hp compressors, 3 phase at auctions, and have less than $1500 in all of them. I have 3 phase power, so it's great. I run the 10hp and use the rest just as tanks...but if something happens, I throw the switches and run others.

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Old 12-13-2016, 11:26 AM   #10
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Tell him to get a good phase converter for $1000 and it opens up a much much bigger realm of compressor options. 3 phase compressors can go for next to nothing at auctions.
They have a phase converter to run a shear, it's old so I'm not sure if it'd be rated for constant duty. I'll check.

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Old 12-13-2016, 11:30 AM   #11
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7.5hp single phase. 23 CFM@150psi I think. Quiet.

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Old 12-13-2016, 12:17 PM   #12
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They have a phase converter to run a shear, it's old so I'm not sure if it'd be rated for constant duty. I'll check.

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If not, contact American Rotary. Good stuff and good prices.
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Old 12-13-2016, 12:17 PM   #13
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Eaton sells the same head as Jory showed. They are imported, I still bought one. Saylor beall will build a single phase for him. I would like to know the model of gangzoaudukfu compressors he is nuking.
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Old 12-13-2016, 12:21 PM   #14
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Eaton sells the same head as Jory showed. They are imported, I still bought one. Saylor beall will build a single phase for him. I would like to know the model of gangzoaudukfu compressors he is nuking.
These are nice compressors from my experience with them.
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Old 12-13-2016, 12:24 PM   #15
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I think 2 of them are northern, I know the head he just replaced was northern at least. Another went down yesterday and it was a bel-aire. He's down to one right now which is why he's looking at upgrading. It started out as a small shop and has grown over the last 20 years and it was easier to just tack on another compressor every now and again for more air. Replacing one a year isn't too terrible but 2 at one time starts to make a $2500 compressor look reasonable. The last one left has a rod knock too lol.

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Old 12-13-2016, 12:29 PM   #16
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Click the image to open in full size.Click the image to open in full size.

I found this on Craigslist but I can't make out the model. It's an 8- something and from what I can tell on Gardner denvers site it's probably 8 hp, I messaged the guy to see if he could get me the full model number.

On a side note, from what I can tell, the emax and eatons are made in the same factory from the same parts.

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Old 12-13-2016, 12:40 PM   #17
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If not, contact American Rotary. Good stuff and good prices.
I was actually just on their site reading about them. The one they have sounds like a big ka-chunk ka-chunk switch so I don't think it's a rotary.

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Old 12-13-2016, 12:43 PM   #18
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I was actually just on their site reading about them. The one they have sounds like a big ka-chunk ka-chunk switch so I don't think it's a rotary.

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Sounds like they have a static phase converter.
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Old 12-13-2016, 12:54 PM   #19
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Yeah, from the little reading I've done it looks like a rotary would be much better for constant duty.

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Old 12-14-2016, 11:59 AM   #20
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Rolair has some impressive offerings. We have a smaller one and it's been solid. It looks like they offer a 33 cfm @ 175 psi running single phase 230v.

H10312K60 | Electric Stationary Compressors | Rolair Systems
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