Bravo G4 17 / Bravo G4 22 / Bravo G4 28
18
EN
3.8. EXAMPLE OF WORKING CYCLE
The sterilisation program can be effectively described as a succession of phases, each one with a very precise objective.
For example, the universal program (cycle B, 134°C -
4’): after loading the material in the chamber, closing the door, selecting the program and starting
the cycle (after locking the door opening mechanism), the following sequence will occur (see the graph below):
1
Generator and sterilisation chamber pre-heating;
2
Air removal and steam penetration in the material through a series of vacuum (extraction of air and fluid from the sterilisation chamber) and pressure
(injection of steam into the chamber) phases;
3
Pressure rises with the consequent increase in the temperature of the steam, until reaching the conditions required for sterilisation (in the example,
134°C);
4
Pressure and temperature stabilisation;
5
Load sterilisation for the required time (in the example, 4 minutes);
6
Sterilisation chamber depressurisation;
7
Vacuum drying phase;
8
Load ventilation, by means of sterile air;
9
Pressure levelling, bringing the sterilisation chamber back to the atmospheric pressure level.
Having reached this last phase, you can unlock the door and remove the load from the sterilisation chamber.
It should be emphasised that phases 1, 3, 4, 6 and 9 are identical in all cycles, with slight variations of duration that are solely dependent on the quantity
and consistency of the load and the heating conditions of the steriliser, while phases 2, 5, 7 and 8 clearly vary their configuration and/or duration on the
basis of the cycle selected (and, as a consequence, the type of load) and the choices made by the user.
A
PRESSURE (BAR)
B
PROCESS
C
TIME (MIN)
D
FRACTIONATED VACUUM
E
VACUUM DRYING
Please refer to the programs appendix for more details on programs.
