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Dual Compressor's


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#1 HDWildBill OFFLINE  

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Posted August 10, 2012 - 11:32 AM

I have two air compressor's, a 15 Gallon and a 21 Gallon can I hook them up to a common line together to give me more volume of air? I'm thinking of running PVC around the shop, replacing the flex hoses. So I thought if I could connect both compressor's to the line then I wouldn't have to wait for the compressor to catch up.

#2 Ryan313 OFFLINE  

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Posted August 10, 2012 - 11:38 AM

I see no reason why you could not hook them up! I think it is a great idea, good luck!
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#3 wawcub47 OFFLINE  

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Posted August 10, 2012 - 11:40 AM

ive been told not to use pvc.
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#4 WNYTractorTinkerer ONLINE  

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Posted August 10, 2012 - 11:40 AM

OK WB- We gotta see pictures of this set-up when it's done!!

I'd stay away from PVC with compressed air too.. (Especially PVC pipe- ala-plumbing!)

You need something that will wisthstand heavy impacts or heat asthey will happen from time to time when you weld or move stuff around..

Edited by WNYTractorTinkerer, August 10, 2012 - 11:43 AM.

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#5 jd.rasentrac ONLINE  

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Posted August 10, 2012 - 11:46 AM

I'm not sure it will work when you hook them up. At construction site we got probs when we tried it without a separate air reservoir. This happened when we made air placed concrete.
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#6 Texas Deere and Horse OFFLINE  

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Posted August 10, 2012 - 11:54 AM

Bill, YES, you can run 2 or more compressors at one time on a common circuit. We do it all the time in production plants that we add new lines to. You will need to get the pressure switches set as close together as you can. I have also been running schedule 40 1" PVC lines in my shop and plant for several years with no issues. Make sure you have a good mount on the lines where your quick couplers are located, so you don't have a stain on the PVC pipe.
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#7 olcowhand OFFLINE  

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Posted August 10, 2012 - 12:00 PM

Yes, like brian said, just have them on like settings. I hook the farm shop's with mine in my small shop together for larger cabinet blasting jobs. The farm's is a 160psi unit, while mine is a 120psi. I put an inline regulator on the hose from the farm's compressor to regulate the pressure down to 110psi. If I don't set it below my smaller compressor, the smaller one won't ever kick on.
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#8 HowardsMF155 OFFLINE  

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Posted August 10, 2012 - 12:25 PM

I don't know that I would use PVC on that. Usually there is a pressure rating given on the pipe, check that. I'd sort of want some safety margin, that is, if the pipe is only rated to 100 psi, I'd try to keep my working pressure down to 75. Other than that, two tanks and two compressors should work ok.
I think schedule 80 is heavier than schedule 40. I'd also look at PEX pipe, if the ratings on it work for you, then it is a simply product to use.
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#9 John@Reliable OFFLINE  

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Posted August 10, 2012 - 12:29 PM

Like others have said, just takes a little fine turning on the pressure switches, also you must use the lowest rated pressure relief of the two on the whole system, as to not over pressurize the weaker tank . I know people that use PVC piping but call me old school, unless your space is huge, I would go with *black pipe, it will cost more but not that much, plus for me the extra peace of mind is worth it, knowing what PSI can do when not contained properly.

* think expanding and contraction

Edited by John@Reliable, August 10, 2012 - 12:31 PM.

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#10 Guest_gravely-power_*

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Posted August 10, 2012 - 12:45 PM

I have two air compressor's, a 15 Gallon and a 21 Gallon can I hook them up to a common line together to give me more volume of air? I'm thinking of running PVC around the shop, replacing the flex hoses. So I thought if I could connect both compressor's to the line then I wouldn't have to wait for the compressor to catch up.


I installed schedule 80 pvc 10 years ago in my garage. No problems.


http://www.engineeri...ures-d_796.html

Edited by gravely-power, August 10, 2012 - 12:45 PM.

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#11 Texas Deere and Horse OFFLINE  

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Posted August 10, 2012 - 01:10 PM

Bill, Here is what my PVC says it's good to and at what temp. I also have a piece that says 360PSI@ 260 F..

2012-08-10_13-02-50_415.jpg
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#12 jpackard56 OFFLINE  

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Posted August 10, 2012 - 01:28 PM

I installed schedule 80 pvc 10 years ago in my garage. No problems.


http://www.engineeri...ures-d_796.html

Thanks for that table, I'm old school too, but that looks very enticing compared to cutting threads on black pipe. I'm planning some changes in my shop and that would be a lot faster to extend than my black pipe. I notice those are ratings @73 F. What about twice that along my attic space? Does this degrade at the higher temps or over time? If not, why are all the commercial places I've seen go up around here are still using black pipe?
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#13 Texas Deere and Horse OFFLINE  

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Posted August 10, 2012 - 01:40 PM

Thanks for that table, I'm old school too, but that looks very enticing compared to cutting threads on black pipe. I'm planning some changes in my shop and that would be a lot faster to extend than my black pipe. I notice those are ratings @73 F. What about twice that along my attic space? Does this degrade at the higher temps or over time? If not, why are all the commercial places I've seen go up around here are still using black pipe?


I would say that is a state building code thing required in all industrial/commercial applications.
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#14 Texas Deere and Horse OFFLINE  

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Posted August 10, 2012 - 01:41 PM

Our PVC air lines passed all TEXAS state building codes in our plant and shop.
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#15 KennyP OFFLINE  

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Posted August 10, 2012 - 01:42 PM

Thanks for that table, I'm old school too, but that looks very enticing compared to cutting threads on black pipe. I'm planning some changes in my shop and that would be a lot faster to extend than my black pipe. I notice those are ratings @73 F. What about twice that along my attic space? Does this degrade at the higher temps or over time? If not, why are all the commercial places I've seen go up around here are still using black pipe?

Probably because of the inspections and OSHA! Those folks don't approve PVC in this application!
Apparently, Texas does!
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