MELAG Vacuklav 41 B+ Evolution - Program Sequences

3 Performance specifications
10
Program sequences
A program runs in three main phases: the air removal and heating up phase, the sterilization phase and
the drying phase. After program start, you can follow the program run on the display. It shows the chamber
temperature and pressure as well as the time until the end of sterilization / drying.
Program phases of a standard sterilization program
Program phase Description
1. Air removal and heating
up phase
Air removal
The air removal phase comprises the conditioning and the evacuation.
During conditioning, steam is repeatedly injected into and removed from the
sterilization chamber. This generates over-pressure and the residual air is
removed. Then, during fractionation, the mixture of air and steam is
evacuated from the sterilization chamber and steam is injected. This
procedure is also called the fractionated pre-vacuum procedure.
Heating
The continued steam injection into the chamber leads to an increase in
pressure and temperature which continues until the program-specific
sterilization parameters have been reached.
2. Sterilization phase Sterilizing
If the pressure and temperature correspond to the program-dependent
nominal values, the sterilization phase begins. The corresponding process
parameters (pressure and temperature) are held at sterilization level. The
sterilization time (holding time) is indicated on the display.
3. Drying phase Pressure release
The sterilization phase is followed by pressure release from the sterilization
chamber.
Drying
The sterile material is dried using a vacuum (vacuum drying).
Ventilation
Upon program end, the chamber is filled with sterile air via the air filter and
adjusted to the ambient pressure. The corresponding display
notificationVentilation is displayed.
Program phases of the vacuum test
Program phase Description
1. Evacuation phase The chamber is evacuated until the pressure for the vacuum test has been
reached.
2. Equilibration time An equilibration time of 5 min will follow.
3. Measurement time The measurement time amounts to 10 min. The pressure increase within the
chamber is measured during the measurement time. The evacuation
pressure and the equilibration time or measuring time are shown on the
display.
4. Ventilation The chamber is ventilated after the end of the measuring time.
5. Test end The display shows the test result, the batch number, the total number of
batches and the leakage rate.