We do have three sets of capillaries going into our Delta plus XP (an
EA/Conflo III, a Gas Bench, and a GC/Combustion Interface II).  However, we
got our SGE valve manifold directly from Thermo when they installed the Gas
Bench.  Each SGE valve goes into the source without being piggybacked onto
one of the others as they were previously.  The valves are in sort of a T
configuration.  I think Thermo might have built this special for us.  You
might contact Frank Trensch to see how they worked it out.  One additional
note, in order to install the valves we needed to do some machining on the
inlet heater block to get it to fit.

Good luck,
Carolyn Colonero

At 12:59 PM 12/9/2003, you wrote:
>Bill, and others who might have answers:
>
>I am just adding a PreCon to our Delta Plus XL which already has a Gas
>Bench and Conflo II attached.  The Gas Bench and Conflo II each have a SGE
>valve, but it will be necessary to unscrew the capillary from the Gas Bench
>to attach the Precon, and vise versa.  It is immediately apparent that this
>is going to be tedious and not a good idea in the long term.  Has anyone
>successfully attached three valves for three continuous flow peripherals to
>a Delta Plus XL?
>
>Thanks in advance,
>
>Paul.
>
>
>At 01:07 PM 11/24/03 -0500, you wrote:
>>Isotopegeochemists,
>>
>>Several of you have emailed me off-line and asked for details regarding the
>>Nupro valve arrangement on our Delta+ XL.  We use a Nupro SS-4H bellows
>>valve swagelocked to the 1/4" SS tube on top of the source.  We then use a
>>1/4-1/8 swagelock adaptor to connect a Nurpro SS-2H bellows valve behind
>>the SS-4H.  Then we use a 1/8-1/16" swagelock adaptor, and a regular
>>vespule graphite ferrule to connect into the silica capillary.  Leak check
>>everything with a He sniffer to make sure that there are no leaks that can
>>entrain atm. into your source (not a good thing). The direction the valves
>>are connected is the arrows point in the direction of the He flow. We were
>>worried at first about the volume of the valves compared to the SGE, but
>>that does not seem to be a problem since the vacuum in the IRMS is so much
>>lower than the He flow in the capillaries.  We open and close the SS-2H,
>>the SS-4H is a backup.  If there are problems with the SS-2H, you can shut
>>off the SS-4H and replace the SS-2H valve or ferrule, or what ever is
>>needed without venting the IRMS.  Works for us.
>>
>>Hope this is useful to some of you that have asked.
>>
>>Bill Showers
>
>
>
>Paul D. Brooks,
>Center for Stable Isotope Biogeochemistry,
>Dept. Integrative Biology MC3140,
>3060 Valley Life Sciences Building,
>UC Berkeley, Ca. 94720-3140.
>
>[log in to unmask]
>
>phone (510)643-1748,
>FAX (510)643-1749
>
>http://ib.berkeley.edu/groups/biogeochemistry/

~~~~~~~~~~~~~~~~~~~~~~~
Carolyn LK Colonero
E34-546
MIT/EAPS
42-44 Carleton Street
Cambridge, MA 02142
lab: 617-324-4002
office: 617-253-7850
~~~~~~~~~~~~~~~~~~~~~~~