Patent ID: 6807986
Filing Date: 2004-10-26
Classification: F16K

Abstract:
A device to reduce noise transmitted from a piping system, said device comprising:an inner central section comprising a plurality of apertures on an upstream side of the inner section and a plurality of apertures on a downstream side of the inner section; a surrounding outer section comprising a plurality of apertures on an upstream side of the outer section and a plurality of apertures on a downstream side of the outer section, the total cross-sectional area of the upstream apertures of the outer section being less than the total cross-sectional area of the upstream apertures of the inner section, the outer section reducing the velocity of a fluid flow relative to said inner section; and a fin downstream of the downstream apertures of the inner section and of the downstream apertures of the outer section and between the inner section and the outer section, the fin facilitating separation between fluid flow from the inner section and fluid flow from the outer section.