Labconco Gel Dryer 4330150 - Manual (Page 14)

NORMAL OPERATION
14
Vacuum Formation
Switch on the vacuum pump and set the pump timer. The vacuum pump will start. The
seal is formed between the platen and the borders of the rubber sheet. After a few
seconds, the rubber sheet will form a tight seal.
In general, the vacuum seal will be more difficult to establish on a larger gel. This is
greatly facilitated by applying the vacuum as rapidly as possible. This is best done
through the use of a pump with a free air displacement of at least 50 liters/minute or by
evacuating the vapor trap prior to applying vacuum to the Gel Dryer. The edge of the
platen may also be moistened with water to assist in the sealing.
Note: When using traps, they must be emptied after each use of the dryer or the
efficiency of the vacuum is greatly reduced, which can result in gel cracking.