Adjustable orifice plate seal
This patent describes an orifice fitting of the type having a body with a flow passage for connecting into a pipeline, an orifice plate seal seat located in a slot in the flow passage, a plate carrier which carries an orifice plate having a orifice for the passage of fluid, and gear means in the body for moving the plate carrier from an inactive position out of the flow passage to an active position in the slot in engagement with the seat and with the orifice plate in the flow passage, an improved mans for sealing the orifice plate against the seat. It comprises the plate carrier having a mounting hole therethrough which has an axis, the orifice plate locating in the mounting hole with the orifice concentric with the axis; an annular seal member located on a downstream side of the plate carrier and encircling the mounting hole, the seal member having a downstream face for engaging the seat; a retaining ring located in the mounting hole, sandwiching the orifice plate between the retaining ring and the seal member; mounting means for mounting the retaining ring to the plate carrier so that the retaining ring may protrude in an upstream direction from the plate carrier by an amount that may be adjusted to fit the axial width of the slot; and wherein the mounting means comprises: a set of threads on the perimeter of the retaining ring which engages the threads in the mounting hole, so that rotating the retaining ring relative to the plate carrier will provide a selected protrusion of the retaining ring from the plate carrier; and set screws located in threaded apertures spaced around the retaining ring and extending through the retaining ring into engagement with the orifice plate, so that rotating the set screws in one direction in the threaded.
- Assignee:
- NOV; NOV-92-028017; EDB-92-103793
- Patent Number(s):
- US 5094272; A
- Application Number:
- PPN: US 7-642071
- OSTI ID:
- 5326010
- Resource Relation:
- Patent File Date: 16 Jan 1991
- Country of Publication:
- United States
- Language:
- English
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