Autoclave sterilisation process for primary containers made of glass

An autoclave sterilization process for primary containers made of glass, comprising:

• exposing said primary containers, in a treatment chamber of an autoclave, to a sterilization treatment with a pulsed flow of steam sequentially fed into the treatment chamber, and
• controlling the pulsed flow of steam on the basis of at least one parameter indicative of operating conditions of the autoclave,
• wherein said parameter indicative of operating conditions of the autoclave is the pressure of the steam in the treatment chamber,
• wherein the sterilization treatment comprises introducing a new mass of steam when the pressure in the treatment chamber reaches a predetermined minimum value and ejecting from the treatment chamber a mass of steam previously introduced when the pressure reaches a predetermined maximum value, and
• wherein the ejecting of the mass of steam comprises closing a shut-off valve disposed in an inlet of the treatment chamber, opening of a shut-off valve disposed in an outlet of the treatment chamber to cause the first pulse of the steam to flow out of the treatment chamber, and reversing operation of a steam supply pump,
• wherein said pressure displays a pulsed pattern.