HELLO!
The best thing for transfer of liquid nitrogen is food grade
silicon rubber tube available from AMESIL High Purity Polymer Technology,
209, Oak Ridge Road, Oak Ridge NJ 07438 (Fax:(973)-697 4175), which we are
using since last 15 years and never has any problem. If you keep transfer
flow too high, there is a possibility of breaking the tube, or else you
can use it for years together.
Best Luck.
L.S.Mombasawala.
NMR Lab, RSIC,
Indian Institute of Technology,
Bombay, India.
____________________________________________________________________________
On Sat, 19 Oct 2002, Wollenberg, Kurt wrote:
> All,
>
> I am forwarding the below request on behalf of a colleague of mine here at Lubrizol. I know that this has appeared before on AMMRL.
>
> We have been using thick black vacuum hoses to do our nitrogen fills since 1984 and never have we seen one shatter sending pieces of frozen rubber flying in all directions. They do split occasionally but this recent occurrence was clearly a safety hazard that we do not want to encounter again.
>
> We appreciate any input into where we can find a metal nitrogen transfer line.
>
> Best Regards,
> Kurt
> ________________________________
> Kurt Wollenberg(KFW) Phone:(440) 347-2026
> The Lubrizol Corporation Fax:(440) 347-4482
> Wickliffe, OH 44092 Mail:153B
> mailto:kfw_at_lubrizol.com http://www.lubrizol.com/
>
> -----Original Message-----
> From: Karabatsos, Julie
> Sent: Friday, October 18, 2002 10:30 AM
> To: Wollenberg, Kurt
> Subject: Search for LN2 transfer line
>
> Kurt,
>
> Here is what we are looking for;
>
>
>
> We are looking for a safe means of transferring liquid nitrogen from the dewar to the NMR during our weekly nitrogen fills. We have always used the thick black vacuum hoses, attached to the dewar with a clamp. This has worked fine, but periodically the hoses crack during a fill, and yesterday one actually shattered. We are hoping to find a metal transfer line similar to the helium transfer line. The line would have to be fitted with a tip at one end to connect with the dewar, and some sort of fitting at the other end to slide onto the nitrogen inlet port on the NMR. Does anyone have ideas where we can look?
>
>
>
> Julie F. Karabatsos
>
> The Lubrizol Corporation
> Phone: 440-347-2260
> fax: 440-347-4482
> email: jfka_at_lubrizol.com
>
>
>
>
Received on Mon Oct 21 2002 - 13:37:43 MST