We have a Motivair model HTD41 (capacity 41 scfm) with the air leaving at 
35F dewpoint. We have had no problems in two and a half years of service.

Richard A. Berger
Mass Spectrometry Resource
Washington University Medical School
St. Louis, Missouri

On Thu, 1 Jun 2006 14:46:52 -0400, Benjamin Harlow <[log in to unmask]> wrote:

>I currently use two filter/water separators (glass bowl type) and follow
>with a 100cc silica gel dessicant trap on my compressed air line.  The
>silica gel changes color in the course of about 3 days.
>
>Can anyone recommend an air dryer to pretreat the compressed air supplied
>to an IRMS system?
>
>thanks,
>
>Ben
>
>Benjamin Harlow
>Washington State University
>School of Biological Sciences
>P.O. Box 644236
>Pullman, WA  99164-4236
>
>Office:  509-335-6161
>Lab:     509-335-6154
>Fax:     509-335-3184
>
>Laboratory for Biotechnology and Bioanalysis Stable Isotope Core
>http://www.isotopes.wsu.edu