Operator`s manual

Basic Operation VirTis BenchTop 2K, 4K and 6K

22 Revision 004, 12/09

Product Preparation: Chamber Drying

BenchTop series freeze dryers can process product in vials or trays directly in the

condenser chamber. To process samples in the chamber:

1. Fill tray(s) or vials with your product.

Do not exceed more than half of the

container’s total capacity.

2. If using a BenchTop 2K or 4K, ensure that the vacuum baffle plate is in the

desired position (i.e., position 1 for pre-freezing or position 2 for freeze-

drying).

3. If desired, insert product probes into the product. For accurate temperature

readings, probe ends should be close to, but not in contact with, the bottom of

the container.

4. Close and secure the chamber lid.

PRACTICAL OPERATING TIP. TO MINIMIZE DRYING TIME, ALWAYS FREEZE PRODUCTS IN AS

THIN A LAYER AS POSSIBLE. NEVER FILL A CONTAINER TO MORE THAN HALF ITS TOTAL

CAPACITY.

Quickseal Valves

Quickseal valves are utilized in many method of drying. They permit the attachment of

flasks for in vitro freeze-drying. They are also used to break vacuum after a cycle

completes. Quickseal valves operate as follows:

Note: Quickseal valves are an integral part of the freeze-drying process and must be

maintained as such. For information regarding upkeep and service of Quickseal valves, see the

General Maintenance section of this manual.

Refer to Appendix B for a list of standard serum vial capacities.

For precise positioning of probes in vials, contact SP Industries about optional MVP Probe Holders.