I am seeking advice on cleaning solvents and procedures to remove diffusion
pump oil (Santovac 5) from the pipework of a mass spectrometer
(VG/Micromass PRISM SeriesI).    The chilled water line that cools the
Diffstaks broke and the thermal trip failed to turn the diffusion pump
heaters off, so the Diffstaks remained hot for 8 hours with no circulation
of cooling water.  After removing both the source and collector Diffstaks
(150L/s), there was evidence of condensation of Santovac on the baffles in
the pipework leading to the collectors.  The baffles in the pipework under
the source did not have visible evidence of diff pump fluid and the source
and source housing visually appeared to be clean.  The pipework containing
the inlet and changeover diffusion pumps (40 L/s) was contaminated with
diff pump oil.  Has anyone had experience with such a calamity and what is
the best way of going about cleaning the contaminated pipework.  Edwards
recommends cleaning with GENKLENE (stabilized trichloroethane) followed by
rinsing with acetone and baking at 75 oC.  Any advice as to how to proceed
would be most appreciated.  Also, has anyone replaced their diffusion pumps
with turbos on an older model PRISM?

Grieving in Gainesville,
David Hodell

David Hodell
Professor of Geology
University of Florida
P.O. Box 117340
Gainesville, FL  32611-7340
http://ess.geology.ufl.edu/hodell/hodell.html

Please Note: My new e-mail address is [log in to unmask]
All mail to the old address will be forwarded to the new one.