Freeze-dryer Alpha 3-4 LSCbasic
5 Set-up and connection
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Version 11/2018, Rev. 1.9 of 01/12/2021
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Translation of the original operating manuel
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5.9.1
Rubber valves
The rubber valves enable the connection of round-bottom flasks, wide-neck
filter bottles, or distributors for ampoules to a manifold or drying chamber.
Depending on the connector of the components, the blue plug can be
removed.
1
Locking handle
2
Aeration connection
3
Vessel connection
4
Rubber plug
5
Connection to freeze-
dryer (e.g. via a
manifold)
Fig. 21: Rubber valve
NOTE
The rubber valves come supplied in an ungreased state. This is why a thin
layer of vacuum grease must be applied to the connector of the freeze-
dryer as well as to the vessel connector prior to start-up in order to ensure
trouble-free operation.
In position A (see figure below), the aeration connector is open and the
vessel connector is closed. The accessory will be aerated while the vacuum
inside the drying chamber is maintained. As a result, vessels can be
exchanged without any interruption of the drying process.
In position B, the aeration connector is closed and the vessel connector is
open. The connected accessory is connected to the freeze-dryer.
In position C, the aeration connector and the vessel connector are closed.
Fig. 22: Possible positions of the locking handle
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