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Author Topic: The Non-magnetic-Outer-Oring Tube of Death  (Read 491 times))

Offline BigBird

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The Non-magnetic-Outer-Oring Tube of Death
« on: September 07, 2021, 11:13:04 PM »
One of these has been lost in transit for a few weeks. I ordered a second one of these from a different seller with US stock and it came pretty quickly.  I have seen a lot of these filters; some being 20 MPa but most being 30 MPa.  This was a whopping 42 MPa!  That's roughly 6091.585 PSI

When I received it the caps were very tight!  I thought I would see a thick wall but was pretty surprised to see what appears to be 2.5 mm or about .1" wall at the threads.  ALTHOUGH really the base of the threads is what the calculation should go by due to the outer o ring.

I put the specs in the Engineersedge.com calculator.  I just calculated using the 2.5 mm or .1".  I had to do a magnet check just to make sure it wasn't some nice alloy=fail.

I'm pretty sure the nice people from China sent me a bomb!

I think the 42 MPa IS the bursting pressure.  That's probably what all that scribbling is on the end of the tube.

Airmega 1.3" OD


2.5mm


Inside


Thread diameter


42mpa


Engineersedge Calculation



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Offline Steveoh

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #1 on: September 08, 2021, 08:50:59 AM »
I bet the brass female quick release fails first.
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Offline sb327

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #2 on: September 08, 2021, 08:55:41 AM »
What does the calculator say for 7075 t6.

I suppose you are figuring it for 6061. Trouble is, itís hard to tell what al alloy they are using. Even if they made a claim, Iím still not sure Iíd believe it.

Dave
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Offline BigBird

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #3 on: September 08, 2021, 12:16:40 PM »
I bet the brass female quick release fails first.
Yeah, I had read of your experience and was going to replace that with a SS one.
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Offline BigBird

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #4 on: September 08, 2021, 12:17:42 PM »
What does the calculator say for 7075 t6.

I suppose you are figuring it for 6061. Trouble is, itís hard to tell what al alloy they are using. Even if they made a claim, Iím still not sure Iíd believe it.

Dave

 They specify "Material: Aviation aluminum alloy" so it could refer to anything.
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Offline sb327

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #5 on: September 08, 2021, 01:27:03 PM »
I have a tube coming I ordered from Amazon. Itís not branded Airmega. The pictures in the description shows to have thick walls. We will see what shows up. It may get sent back, which is why I used Amazon.

Dave
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Offline BigBird

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #6 on: September 14, 2021, 07:07:40 PM »
I have a tube coming I ordered from Amazon. Itís not branded Airmega. The pictures in the description shows to have thick walls. We will see what shows up. It may get sent back, which is why I used Amazon.

Dave

My new one just got here.  It is MUCH bigger...and bluer.  Safety margin and then some!  The other one may be good for the hand pump or a big LDC.



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Offline sb327

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #7 on: September 14, 2021, 10:22:08 PM »
I got mine a few days ago and it looks just like your first one. Airmega on the side and all.

I removed both outer orings. Not sure why they are on there. The inner ones hold fine.

I put a small tampon filter downstream just in case some of the media gets loose. I donít trust the way they shove the tampon into the small od of one end of mine. I recall someone on here recently had one that let go of some fibers and they plugged off the quick connect on his gun.

Iíve ran mine to 4200 several times since I got it.

That blue one is huge. I wouldnít want it on a handpump for sure. Would make a decent tube for a conversion or custom build. Wonder how many ccís it is?

Dave
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Offline BigBird

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #8 on: September 14, 2021, 11:28:34 PM »
Yeah.  My black one had the outside orings and not the inside although I see a groove for it.  There may be orings for it too.  I don't trust the wall thickness.  I think it was Steveoh's that blew.  I read about that on another forum in a Google search (staying true to GTA).  I have a SS quick connect.

Someone here made a pressure vessel out of one of these blue ones.  I was just reading it. I think even the black one would maybe even make a 3kpsi pistol if you can lower your shot count expectations.

So 4200 psi?  I wonder if anyone else here is using these Airmega's?
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Offline Nvreloader

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #9 on: September 15, 2021, 12:07:08 PM »
Dan
Very interesting, in the size difference.............. ;)  GO Blue. What is the rating for the Blue?

Can you provide a link for the Blue one........ 8)

Thanks,
Don
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Offline BigBird

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #10 on: September 15, 2021, 11:10:34 PM »
Dan
Very interesting, in the size difference.............. ;)  GO Blue. What is the rating for the Blue?

Can you provide a link for the Blue one........ 8)

Thanks,
Don

This is the listing but it doesn't list a MPa rating, just the 30 MPa burst disk.  Here are some measurements.  Even if it is 6061 I think it is good to 4500 PSI.  Not sure the thread but maybe 32mm x 1.5??

https://www.amazon.com/gp/aw/d/B08LKYXBYS










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Offline BigBird

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #11 on: September 15, 2021, 11:31:38 PM »
When ordering the black one I thought it was the same size where I could use the cartridges in it.  I didn't find much info on the differences.  This blue one was in the Amazon Warehouse.  So it wasn't that much difference.
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Offline Nvreloader

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #12 on: September 16, 2021, 12:01:33 AM »
Thank you,

Don
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Offline subscriber

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #13 on: September 17, 2021, 11:50:47 PM »
They specify "Material: Aviation aluminum alloy" so it could refer to anything.

It becomes "aviation alloy" when parts go flying...

Perhaps Lloyd could pressure test one of these to destruction with his hydraulic setup?  https://www.gatewaytoairguns.org/GTA/index.php?action=profile;u=2205

For instance:

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Offline BigBird

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #14 on: September 18, 2021, 12:01:22 AM »
They specify "Material: Aviation aluminum alloy" so it could refer to anything.

It becomes "aviation alloy" when parts go flying...

Perhaps Lloyd could pressure test one of these to destruction with his hydraulic setup?  https://www.gatewaytoairguns.org/GTA/index.php?action=profile;u=2205

For instance:



Yeah.  I'm pretty sure I could do it with my 10kpsi hydraulic hand pump.  I need to get the air out of it.  Llloyd has a booster but I'm not sure it is needed.  That would probably help determine if it is 7075 or something else.  However I think if I put the inside rings on it may hold a lot more pressure.
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Offline BigBird

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #15 on: September 23, 2021, 09:25:47 PM »
Tried to replace the 8MM Female Quick-Disconnect and got the wrong thread! (1/8 BSPP).  It fit but didn't seal.  Used this filter to 3000psi and no problems (after I put the other fill whip on instead of thequick connect.

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Offline BigBird

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #16 on: September 24, 2021, 10:34:36 PM »
Does anyone know the thread on these filters?  Is it 1/8  NPT?  My 1/8"-28 BSPP almost fits but gets tightest the end and air blows by (55 degree vs 60??).  It seals on an internal delrin ring.
It must be either 1/8 nps or M10 x 1 mm ?  It is a straight threaded fitting, hence the white ring for sealing.  I just think it is odd to have an imperial thread on so many Chinese parts.

Here are some threaded ends/females and 8mm nipples:


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Offline Rob M

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #17 on: September 24, 2021, 11:21:51 PM »
theyre generally m10 -1.0
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Offline BigBird

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #18 on: September 25, 2021, 12:44:46 AM »
theyre generally m10 -1.0

Great.  That is a tap and die I have. Now I need a 1/8 BSPP to make the SS quick connect converter.
Thanks!
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Offline BigBird

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Re: The Non-magnetic-Outer-Oring Tube of Death
« Reply #19 on: September 27, 2021, 01:40:18 PM »
Ok.  My biggest worry was the brass quick connect.  I don't have a 10mm one so I just hooked the SCBA fill system directly into the blue filter.  Why get complicated?  Filled up my 30 min tank and worked to 1500psi. Stopped there cause it went to 60 c.  Will fill again when ice freezes over.




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