Compressor 6mm tube

[TheEntertainer]

Hi all, where can a find 20cm of the tube as per the pic. It runs from the no return valve into the controller. I’ve called everyone from enzed to pilot air and no one sells them. Thanks heapshttps://uploads.tapatalk-cdn.com/20200624/83cfa6f37caa8d5f3f945c4c2218b63c.jpg

[scarry]

IS it aluminium?

If you can use copper,its around, but in 1/4",which is around 6.3mm from memory.

[TheEntertainer]

Hi,

Yes it looks like something between alloy and lead as it's very brittle ans soft. If I can just find a place where I could by 200mm....

cheers

[p38arover]

Did you ask Enzed or Pirtek about nylon? I bought some from one of the them for P38A EAS air lines.

If you can't find any, I can send you some.

[TheEntertainer]

Hi, i bought some nylon 6mm, unfortunately the fitting on the non return valve is not a compression type. Instead the alloy was flanged out and fits without a compression fitting. I’ll go down and add a pick in a bit.

[scarry]

We use something similar on magnahelic gauges,its aluminium.

But i need to measure it to see if its 6mm or 1/4 inch.They do have a similar fitting for the end,but don't know if its the same as yours.

Is yours exactly 6mm?

[Gav 110]

IS it aluminium?

If you can use copper,its around, but in 1/4",which is around 6.3mm from memory.

Have used 1/4” copper on one of my compressors
I can’t remember if it was a straight forward connection or I ginned around [emoji481][emoji481][emoji481]

[TheEntertainer]

https://uploads.tapatalk-cdn.com/20200624/d7b94a1aa87bc8278c43edf655928b48.jpg
Cant do this with the nylon...

[Homestar]

https://uploads.tapatalk-cdn.com/20200624/d7b94a1aa87bc8278c43edf655928b48.jpg
Cant do this with the nylon...

Sure can - heat gun. Nylon is a thermoplastic and can be reshaped pretty much endlessly - but get it too hot and it becomes a blob pretty easily. Heat it gently and push it onto something that has that shape - when it cools, it will stay that way. It won’t lose strength doing this and will take the pressure no problems.

[Gav 110]

You might find that bit of pipe will get too hot for the nylon and end up blowing out

[TheEntertainer]

O and measured the tube to be 6mm exact...

[scarry]

https://uploads.tapatalk-cdn.com/20200624/d7b94a1aa87bc8278c43edf655928b48.jpg
Cant do this with the nylon...

Thats a flare,so what does the nut look like?

So if its 6mm,then 1/4" copper tube is no good.

i will have a look in the morning to see what size the aluminium tube is we use,hopefully there is some in the shed,but i don't know what pressure it is rated at.

[p38arover]

Hi, i bought some nylon 6mm, unfortunately the fitting on the non return valve is not a compression type. Instead the alloy was flanged out and fits without a compression fitting.

Ahhh. The P38A EAS line runs at up to 160psi so it could have been OK. The P38A air lines use push-in fittings like those pictured. You might be able to adapt some.

Composite Push in Fittings, Pneumatic Push to Connect Fittings (https://www.wellfittings.com/pneumatic-fittings-pneumatic-tubing/composite-push-in-fittings/)


162392

[Blknight.aus]

use 1/4 copper and a brake double flaring tool only use the first flare, seal the thread and back of the flare with loctite 567 and let is stand for at least 24 hours to set up.

common as.

[gromit]

Ahhh. The P38A EAS line runs at up to 160psi so it could have been OK. The P38A air lines use push-in fittings like those pictured. You might be able to adapt some.

Composite Push in Fittings, Pneumatic Push to Connect Fittings (https://www.wellfittings.com/pneumatic-fittings-pneumatic-tubing/composite-push-in-fittings/)


162392

The burst pressure of Nylon tube drops significantly as the temperature rises plus the seal in a pneumatic fitting would typically only be rated to 60C.
Most compressors use a metal section because the temperature can get to a point where you leave skin behind if you touch it.

Aluminium would have been used for low cost (and heat dissipation), steel or copper could be used as a replacement. Copper easier to flare.



Colin

[scarry]

The aluminium tube I have here is 6.3mm,so 1/4 inch.

Have seen 6 mm copper tube,Stubbs on some of our compressers made in Europe are 6mm,but never seen it anywhere else.Wont be available in Australia.

I would try 1/4 copper first and see how you go.

Any AC or Refrig mechanic would have a piece or a gas fitter.

[TheEntertainer]

Hi, thanks for all the help so far. Flanged the tube and it seems the be holding 8bar just fine. Not sure how long the tube will hold though... would prefer the alloy tube later on.https://uploads.tapatalk-cdn.com/20200625/61561fa9f6e84f4786619894ff51ce77.jpg

[Gav 110]

Hi, thanks for all the help so far. Flanged the tube and it seems the be holding 8bar just fine. Not sure how long the tube will hold though... would prefer the alloy tube later on.https://uploads.tapatalk-cdn.com/20200625/61561fa9f6e84f4786619894ff51ce77.jpg

Let us know how the nylon goes, I’m sure the heat will be the killer???

I found the compressor that I replaced the alloy tube with copper
I think I drilled the flare nuts out with a 1/4” bit??? Maybe 7mm???
I assembled it about 5 years ago and it’s survived the “farm service trailer” flogging [emoji12]
(Even the old Thumper compressor has survived)
https://uploads.tapatalk-cdn.com/20200630/beb62baf5a0fdb60ab5ee4e2f4694113.jpg
https://uploads.tapatalk-cdn.com/20200630/61c2167ce9e74f43fcf0fbf94511524c.jpg