Averaging orifice primary flow element

Details Averaging orifice primary flow element Averaging orifice primary flow element

2007-03-29

2008-08-05

Patel, Harshad (Department: 2855)

Measuring and testing

Volume or rate of flow

Using differential pressure

C073S861520

Reexamination Certificate

active

07406880

ABSTRACT:
A process flow device includes a self-averaging pitot tube type of primary flow element for measuring, by a differential pressure process, the volumetric rate of fluid flow at a point in a fluid carrying conduit where the velocity profile of the fluid is asymmetric with respect to the longitudinal axis of the conduit. The improved flow element comprises an annulus having a central opening and a pitot tube type flow-impeding device disposed transversely across the central opening and perpendicular to the longitudinal axis of the conduit. The pitot tube type flow-impeding device includes a plurality of total pressure ports in an upstream facing surface, a plurality of static pressure ports in a downstream facing surface, and total and static pressure plenums connected in fluid communication respectively to the total and static pressure ports.

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Supplementary European Search Report issued in EP 03709290.5 on Mar. 29, 2007.

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