isolates the Stoppering
Tray Dryer from the Freeze Dry
System to shorten time neces-
sary to reestablish working
vacuum levels and to provide a
means for checking end point.
While the researcher loads and
pre-freezes samples on the
shelves, the Isolation Valve may
be closed allowing the Freeze
Dry System’s vacuum and col-
lector to reach working levels.
At the end of lyophilization,
the valve may be closed to test
the rate of vacuum decay in the
Tray Dryer. Rapid decay indi-
cates end point has not been
reached. See page 40 for
ordering information.