[AR] Re: Explosive decompression of o-rings with helium

  • From: Andrew Burns <burns.andrew@xxxxxxxxx>
  • To: arocket@xxxxxxxxxxxxx
  • Date: Thu, 20 Aug 2015 19:44:54 +1200

That type of connection is sometimes called a conflat flange, they need
fairly high clamping forces to work but are also fine for high pressures
and cryogen when designed/made properly.
On 20/08/2015 7:14 pm, "George Herbert" <george.herbert@xxxxxxxxx> wrote:

I don't know about He, but some high vacuum systems use fittings with a
couple of machined sharp bumps in a ring on each side, with a flat copper
disc sealed in between with the sharp bumps pressing into the malleable
copper.

One use per "gasket" but they seem to work well, and copper recycles
fine...

George William Herbert
Sent from my iPhone

On Aug 19, 2015, at 9:12 PM, Rick Dickinson <rtd@xxxxxxxxxxxx> wrote:

Anthony,

Are those available through McMaster? I don't remember seeing that
option....

<cheeky_grin />

Cheers,

Rick Dickinson


On August 19, 2015 8:34:01 PM PDT, Anthony Cesaroni <
acesaroni@xxxxxxxxxxx> wrote:
Wouldn't designing your system with stainless steel O rings eliminate
the issue? We use them on our oxidizer flanges including cryogenic and
they seem to work quite well.

Anthony.

Sent from my iPhone

--
Sent from my Android device with K-9 Mail. Please excuse my brevity.



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