Partialdruckregelung von Gas zur Optimierung eines Verfahrens

摘要

A main regulation valve (24) controls total pressure of gas mixture in the vacuum enclosure (8) as a function of total pressure set point. An auxiliary regulation valve (29) held below a secondary pump (9), is controlled as a function of delivery pressure set point to modify delivery pressure of the pump and to adapt its pumping capacity selectively for adjusting the proportions of gases in mixture of the enclosure. An independent claim is also included for the controlling method of low pressure gas mixture in vacuum enclosure.