Oscillating pressure reducing valve for gaseous fluids, specially for high pressure oxygen.

摘要

The invention relates to an oscillating pressure-reducing valve for a gaseous fluid, comprising a housing with an internal pressure-reducing chamber permanently communicating with the outlet for the low-pressure fluid, and periodically with the inlet with the high-pressure fluid via an oscillating sealing system. According to the invention, the sealing system (108) essentially consists of a fixed ceramic part (109) and a movable ceramic part (110), these parts being permanently in sliding contact against each other and each comprising a through-opening (111,112) in order to establish or close the communication; the movable ceramic part (110) is furthermore connected to a drive system (118) which is itself coupled to a movable partition (113) of the pressure-reducing chamber (106). Application, in particular, to oscillating pressure-reducing valves for high-pressure oxygen, in particular in the field of aeronautics and welding.