Hello John
        I have ordered gold orings for the valves in our 252 and Kiel
prep system from the company listed below.  I have them on the shelf
and have not used them yet because I have not had a need yet.  But
they measure the same size as the Finnigan ones and should work.  SIS
also has other size orings for less money including the source for
the 252 at about 1/2 price.

Valves are:

Gold Gasket, OD (mm)=37.5, ID (mm)=36.0, Diameter (mm)=0.78

http://www.sisweb.com/search.htm?query=455163

Scientific Instrument Services, 1027 Old York Rd., Ringoes, NJ 08551;
PHONE: (908)788-5550

1.  2 each of 455163, gold o-ring, 46.25 each

I have not had any luck finding any supplier for stamps and have
considered having them made by a jeweler.  If any one has any
experience with this please let me know.  I hope that this helps.
Jason


>Hello
>
>Does anyone have a source for cheaper spares for the vacuum valves on the
>Kiel with MAT253 device than Thermo charge?  We have had to replace stamps
>on several of our valves, and need gold stamps and gaskets.
>
>Alternatively we do have facilities for making these parts, but we're not
>sure of the original gauge of the wire used in the seals.  Also, what gold
>purity (99.999%)? is required for the stamps and seals.
>
>Hoping someone has already been through this and can suggest suppliers.
>
>Yours,
>
>John Hill
>
>
>John Hill
>Mass Spectrometry Facility
>University College London
>Chemistry Department
>20 Gordon St.
>London
>WC1H 0AJ
>
>Tel:  020 7679 4605
>Fax: 020 7679 7451
>Mobile: 07956 924058


--
Jason Curtis, Ph.D.
Stable Isotope Mass Spec Lab manager
Associate-In Geochemistry
Department of Geological Sciences
241 Williamson Hall
University of Florida
Gainesville, FL 32611
[log in to unmask], office 352-392-2296
lab 352-392-3344, fax 352-392-9294