Multistage valve, particularly discharge valve for supplying air into aircraft cabin and process of controlling pressure in the aircraft cabin

摘要

The invention relates to a differential valve, specially a cabin air discharge valve in the cabin pressure regulation system of an aircraft, particularly an airplane. The differential valve has a smaller first step (20) and a larger second step (30) in addition to a drive gear mechanism (40). The first valve step (20) and the second valve step (20) are connected to the drive gear mechanism (40) in such a way that the first valve step (20) is actuated separately from the second valve step (30). The invention also relates to a method for regulating cabin pressure by means of said differential valve.