Patent ID: 6199434
Filing Date: 2001-03-13
Classification: G01F

Abstract:
A compact variable-pressure gas metering device for metering a volume of gas flowing along a pipe, downstream from an expander-regulator, and comprising in succession: a flow straightener, a velocity-measuring flowmeter, and a silent flowrate limiter; wherein the straightener is disposed between a flange of an upstream pipe for coupling to the expander-regulator, and an upstream flange of the flowmeter, wherein the limiter is disposed between a downstream flange of the flowmeter, and a flange of a downstream pipe, wherein the straighter comprises a support ring in which there are mounted in order, from upstream to downstream, a spacer in the form of an annulus, a first porous plate and a first perforated plate perforated by holes co-operating with the first porous plate, and wherein the limiter comprises an upstream web defining a second perforated plate perforated by a defined number n of calibrated holes of total flow section that is much less than the flow section of the first perforated plate, a second porous plate, and a downstream web defining a third perforated plate perforated by holes of section that is greater than the section of the calibrated holes of the second perforated plate of the upstream web and of total flow section that is much greater than the total flow section of the second perforated plate of the upstream web.