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Tool Talk Discussion Forum

Short flexible air line--sanity check

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Bill R

08-21-2003 23:07:19




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I need a short flexible air line to run from a compressor to an air cooler/dryer. The idea is to isolate the compressor vibrations from the fixed cooler. The simple solution is to cut a short section of poly air hose, then insert a barbed connector into the hose and put a hose clamp on it. Or I could use a water heater line, which has a rubber tube inside and braided stainless on the outside. Tank pressure is 165, regulated down to 120 or so, max. The short section of hose will be at 120 PSI. I'll drop the pressure down again at point of use. Any thoughts on these two approaches? Any better ideas? Thanks

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Mike

08-22-2003 18:29:52




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 Re: Short flexible air line--sanity check in reply to Bill R, 08-21-2003 23:07:19  
I use a 4 foot lenghth of hydraulic hose purchased off the shelf at TSC for $16.00



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Alvin NE WI

08-22-2003 17:21:44




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 Re: Short flexible air line--sanity check in reply to Bill R, 08-21-2003 23:07:19  
I would use a hydraulic hose... Go to a implement shop and have them make one up. That will last, take the heat as oil gets very hot also. If NAPA quated you a price of 55 bucks it must be a #ell of a long hose.



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Mac

08-22-2003 10:41:42




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 Re: Short flexible air line--sanity check in reply to Bill R, 08-21-2003 23:07:19  
Coiled copper as stated would be the most economical approach. Used it a lot.



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evielboweviel

08-22-2003 08:19:10




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 Re: Short flexible air line--sanity check in reply to Bill R, 08-21-2003 23:07:19  
copper tubing coiled three times will handle the heat and vibration.



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Bill R

08-22-2003 09:56:37




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 Re: Re: Short flexible air line--sanity check in reply to evielboweviel, 08-22-2003 08:19:10  
Thanks guys. That all makes sense. I had checked the hydraulic hose solution at NAPA, but they wanted about $55 for one hose. Thought I'd try to find a less costly approach. I'll pursue your ideas.



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Mike

08-22-2003 17:47:39




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 Re: Re: Re: Short flexible air line--sanity check in reply to Bill R, 08-22-2003 09:56:37  
I had one made up at a supply house to my specs. while I waited----cost 12 bucks and I KNOW it will hold the pressure.
I also asked the manufacturer of black pipe fittings about this issue and they said there is no need for the hose as the vibration will not affect the fittings. I already had the hose made so I used it.



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Philip

08-22-2003 07:42:29




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 Re: Short flexible air line--sanity check in reply to Bill R, 08-21-2003 23:07:19  
Bill, I would suggest flexible metal hose. Only this will take the temperatures. Contact me directly for more information. Philip.



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Frank M.

08-22-2003 18:07:15




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 Re: Re: Short flexible air line--sanity check in reply to Philip, 08-22-2003 07:42:29  
Have you ever noticed how hot some hydraulic systems can get? Also they run at far higher pressures. Our compressor, at work, has had the same 1/2" x 24" hydraulic hose on it since 1975.
Tell me again how it won't last.
My 2 cents
Frank M.



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Philip

08-25-2003 04:45:03




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 Re: Re: Re: Short flexible air line--sanity check in reply to Frank M., 08-22-2003 18:07:15  
Frank, I would like to know who the manufacturer of that hose is, and what part number you are using. Just curious. Thank you. Philip.



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Frank M.

08-25-2003 17:36:47




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 Re: Re: Re: Re: Short flexible air line--sanity ch in reply to Philip, 08-25-2003 04:45:03  
I'm pretty sure it's a Dayco hose. Have no idea on the part number. I work in a farm store, and this is the brand we've sold as long as I remember. BTW Sorry if my previous post seemed rude. That last line was uncalled for.
Catch ya' later
Frank M.



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Philip

08-26-2003 04:43:27




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 Re: Re: Re: Re: Re: Short flexible air line--sanit in reply to Frank M., 08-25-2003 17:36:47  
Frank, Thanks for the reply. If you get a chance, check that Dayco part number for me. I am really interested in that hose. Thanks. Philip.



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MikeM

08-22-2003 07:30:26




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 Re: Short flexible air line--sanity check in reply to Bill R, 08-21-2003 23:07:19  
If you are taking air right off the compressor it is going to be too hot for any of these. I would suggest going to a semi truck parts house
and get a section of the hose they use off the compressor it is high temp nylon with stainless steel braids on outside. Takes the heat and flexes.



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Rick

08-22-2003 04:55:56




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 Re: Short flexible air line--sanity check in reply to Bill R, 08-21-2003 23:07:19  
Either use a section of air hose and have ends put on you need or use piece of hyd hose put ends on you need. These are both rated above what you need.



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Slowpoke

08-22-2003 00:43:33




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 Re: Short flexible air line--sanity check in reply to Bill R, 08-21-2003 23:07:19  
Most city water pressure is 40-75 lbs. I wouldn't use a flex water line for 120+ air. What is the max operating pressure of the flex line?
I don't know about the poly air line, but I would suspect that the operating pressure is for intermittent use, not continuous 365 days, year after year, as your tank pressure may well be. Flexable metal hose is available from industrial supply places like Grainger. It is made for the service you need. Max working pressure is 500psi, burst psi 2500. Their prices range from $10 for a 3/8" x 9" to $15 for a 3/4" x 11.5". For these, you will need to solder to copper tubing. Other brands may have pipe thread ends. For email, remove the Z.

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JMS/MN

08-22-2003 00:17:57




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 Re: Short flexible air line--sanity check in reply to Bill R, 08-21-2003 23:07:19  
Small diameter hydraulic hose. Takes pressure of 1000, 2000 psi.



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