Using your soapy water, check the area where the valve threads into the
cylinder.  If not there, the valve packing could be bad and leaking through
the stem.

I would also recommend using 409 as the best leak detection solution. Far
superior over just soapy water.

Good luck,


--
J. Michael Koonce
Gas Imaging Systems, Inc.
One Post Street, Suite 2515
San Francisco, CA 94104
Telephone: (415) 398-7167
Facsimile: (415) 398-7169
> From: Jamie Kesae Tanimoto <[log in to unmask]>
> Reply-To: Stable Isotope Geochemistry <[log in to unmask]>
> Date: Tue, 9 Mar 2004 13:31:07 -1000
> To: [log in to unmask]
> Subject: [ISOGEOCHEM] EA...O2 leak?
>
> Hi all -
>
> I'm relatively new to EA's and have what may be a excessively simple
> question.  My oxygen tenk seems to be dropping quickly - it's gone from
> 2250 psi to 1400 psi in about 4 months.  I believe our previous tank
> lasted much longer.  I've leak tested (with soapy tap H2O) all the
> fittings that are between the oxygen tank and the EA and all the
> fittings in the EA.  Does anyone have any suggestions for internal
> sources of O2 loss?
>
> Also, I noticed the metal fittings below the autosampler and above the
> oxidation reactor tube are very hot to the touch.  Does anyone else
> experience this?
>
> Thank you!
>
> J. Tanimoto