Dear efhss,
i have been working in palace where the atomspheric pressure is lower than normal atmopheric pressure. Prevacuum assisted autoclave can reach upto - 0,75 bar in pre vacuum stage. But i have read that prevacuum should reach up to - 0,85 bar.so is the mentioned value of prevacuum sufficient to remove the air and condesiable gases to get a sterilization process. while machine always pass the bowie&dick test and there is no positive BI test. if any one could help me to get over this confusion.
Thanking you
regards
hafeez

Hello Hafeez!

The effeciency in terms of air removal of a pre-vacuum cycle does not only rely on the absolute depths of vacuum achieved. It is also how many evacuations take place to achieve a sufficient dilution. To a certain extend a not so deep vacuum can be compensated by a higher number of "pulses". For single vacuum pulse cycle, this is different!