Patent ID: 6505646
Filing Date: 2003-01-14
Classification: F16K,Y10T

Abstract:
A pressure reduction valve for a compressible fluid, the valve comprising an inlet (2) and outlet (3) separated by a pressure reduction member (4) having a plurality of nozzles (8), a diffuser, an attenuation chamber (10) intermediate the pressure reduction member and the diffuser (9), and a plug (6) that is movable to close one or more nozzles so as to control the amount of flow of the compressible fluid from the inlet (2) to the outlet (3) characterised in that the nozzles (8) are convergent-divergent nozzles in the direction of flow of the compressible fluid, and that the attenuation chamber (10) is disposed downstream of the plug (6), so that its volume is sufficient for attenuating the noise from the turbulence of jets of compressible fluid emergent from the nozzles (8) independently of the position of the plug (6).