Abstract: A method for cleaning objects is disclosed. The method includes placing the objects into a cleaning chamber and contacting them with a dense phase gas. After draining the dense phase gas from the cleaning chamber, the pressure in the cleaning chamber is changed at a rate of at least 1 bar per minute, preferably at a rate of 5 bar per minute, more preferably at a rate of 10 bar per minute.

Abstract: A method is provided for processing parts in more than one bath of dense phase carbon dioxide wherein the processing includes transferring dense phase carbon dioxide from a storage tank to a cleaning chamber, processing said parts in said cleaning chamber with said dense phase carbon dioxide, withdrawing at least a part of said dense phase carbon dioxide from said cleaning chamber, distilling said withdrawn dense phase carbon dioxide, and transferring said distilled carbon dioxide back to said storage tank, wherein said distilled carbon dioxide is cooled prior to being transferred to said storage tank and said cooling is carried out depending on the temperature and/or the pressure in the storage tank and/or the cleaning chamber.

Abstract: The invention relates to a method for cleaning objects in a cleaning vessel using liquid carbon dioxide, wherein the cleaning vessel is at least partly filled with liquid carbon dioxide. Prior to and/or during the cleaning operation the pressure within said cleaning vessel is raised to a value above the corresponding vapour pressure. A gas other than carbon dioxide is introduced into said cleaning vessel and at least a portion of the cleaning operation is performed after the introduction of said gas.

Abstract: A system and method to transfer a cryogenic liquid from a station tank system to a recipient tank is provided. At least a part of said cryogenic liquid is stored at a first pressure higher than the pressure in said recipient tank and is cooled to a temperature below the equilibrium temperature for said first pressure. The cooled part of said cryogenic liquid is transferred to said recipient tank.

Abstract: A method for cleaning or sterilizing objects in a liquid fluid cleaning system comprising a high-pressure storing/working vessel, a cleaning chamber, and a low-pressure supply vessel, the method comprising the steps of loading the cleaning chamber with objects to be cleaned or sterilized; supplying cleaning fluid to the cleaning chamber from the low-pressure supply vessel by means of pressure difference; supplying cleaning fluid to the cleaning chamber from the high-pressure storing/working vessel; cleaning the objects in the cleaning chamber with the cleaning fluid; transferring cleaning fluid from the cleaning chamber to the high-pressure storing/working vessel; and unloading the cleaned objects from the cleaning chamber.

Abstract: A method for cleaning or sterilizing objects in a liquid fluid cleaning system comprising a high-pressure storing/working vessel, a cleaning chamber, and a low-pressure supply vessel, the method comprising the steps of loading the cleaning chamber with objects to be cleaned or sterilized; supplying cleaning fluid to the cleaning chamber from the low-pressure supply vessel by means of pressure difference; supplying cleaning fluid to the cleaning chamber from the high-pressure storing/working vessel; cleaning the objects in the cleaning chamber with the cleaning fluid; transferring cleaning fluid from the cleaning chamber to the high-pressure storing/working vessel; and unloading the cleaned objects from the cleaning chamber.