Post by jonjel on Apr 26, 2012 10:04:07 GMT 1
I will seek some advice from the wise.
I have been asked to fill some open topped cylinders with Krypton gas, at atmospheric pressure before sealing them. These are perhaps 200mm bore x 750mm long and with the top unrestricted, i.e., the open top is the full 200mm.
The problem is, knowing when they are filled. I know that Krypton is a heavier than air gas, so in theory if I fill them slowly with a dip tube into the bottom of the cylinder the Krypton will slowly replace the air, but that will be a matter of some guesswork. Flow rate and time.
However I seem to recall that Krypton can be seen almost as a heat haze when it is vented from a gas cylinder.
So my solution to the problem would be to fill the open cylinders slowly until I get visible Krypton overflowing.
Is that going to work, or does anyone here have any better ideas (most will be better than mine!)
And I would love to tell you all what this is about, but if I did I would have to kill you!
I have been asked to fill some open topped cylinders with Krypton gas, at atmospheric pressure before sealing them. These are perhaps 200mm bore x 750mm long and with the top unrestricted, i.e., the open top is the full 200mm.
The problem is, knowing when they are filled. I know that Krypton is a heavier than air gas, so in theory if I fill them slowly with a dip tube into the bottom of the cylinder the Krypton will slowly replace the air, but that will be a matter of some guesswork. Flow rate and time.
However I seem to recall that Krypton can be seen almost as a heat haze when it is vented from a gas cylinder.
So my solution to the problem would be to fill the open cylinders slowly until I get visible Krypton overflowing.
Is that going to work, or does anyone here have any better ideas (most will be better than mine!)
And I would love to tell you all what this is about, but if I did I would have to kill you!
