Technical data

4.8.2. Vacuum sensor, vacuum pump and pressure control
valve connection
Connection diagram
Process A (single-chamber system):
Freezing and gentle drying of low-freezing and thermolabile substances
on cooled shelves inside the ice condenser chamber (see figure 1).
Typical drying vessels::
• Dishes
• Injection vials (can be sealed under vacuum)
Process B (double-chamber system):
Separate freezing (e.g. in a deep-freeze) and drying outside the ice
condenser chamber (see figure 2)
Typical drying vessels:
• Dishes
• Injection vials (can be sealed under vacuum)
• Round-bottom flasks, wide-neck filter bottles
• Ampoules
1 Vacuum pump
2 Ice condenser chamber
3 Ice condenser
4 Glass lid
5 Drying chamber
6 Heatable shelf
7 Vacuum sensor
8 Drain valve
9 Motor- driven intermediate valve
11 Pressure control valve
12 Aeration valve
13 Rubber valve
14 Thermal insulation
Operating Manual Freeze Dryer ALPHA 1-4 LSC / ALPHA 2-4 LSC Installation and Commissioning of the Unit • 29