We've used Pro-Vac too, with good results.   For MAT251 bellows, the cost 
is unfortunately much higher (2-8-07 quote of $2800).  However, they 
perform a modification on the unit that allows for subsequent repairs to be 
much more reasonable ($600 US).   Anyhow, I'd endorse their work.




  At 05:23 AM 3/16/2007, you wrote:
>Dear List-members,
>
>We have a Finnigan Mat252 that is currently running with a single bellow. 
>The left variable volume has a leak. When running on the old software it 
>did not seem to be a big problem to only have one bellow, but we want to 
>switch to Isodat 2.0. Not having the second bellow appears to affect the 
>performance of the machine when running on the new software. We can 
>exchange our bellow with Finnigan for a refurbished one but this is very 
>expensive. I would like to know if anyone has ever had there bellow 
>repaired and if this is a good solution. Otherwise, if there is a bellow 
>for sale, we are also interested.
>
>Thanks.
>
>Best regards,
>Suzan
>

Lora L. Wingate
University of Michigan
Department of Geological Sciences
Stable Isotope Laboratory
1100 North University
1013 C.C. Little Building
Ann Arbor, MI 48109-1005