Patent ID: 11885438
Assignee: LANCASTER FLOW AUTOMATION LLC
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A choke valve, comprising:
a valve body having an internal cavity; and
an orifice plate disposed within the internal cavity of the valve body to control a flow of fluid though the choke valve;
the orifice plate including:
a center point and being rotatable about a center axis extending longitudinally through the center point; and
a first aperture extending through a face of the orifice plate, the first aperture defining a first equi-incremental phase region, the first aperture being spaced away from the center point of the orifice plate,

wherein:
rotation of the orifice plate with respect to the center point effects transitioning of the orifice plates among a plurality of open states, including:
rotation of the orifice plate in a first direction with respect to the center point effects an equal incremental increase in fluid flow per degree of rotation in an open area of the first equi-incremental phase region; and
rotation of the orifice plate in a second direction, the second direction opposite the first direction, effects an equal incremental decrease in fluid flow per degree of rotation in the open area of the first equi-incremental phase region;

wherein the first aperture further includes a semi-circular section extending from the first equi-incremental phase region and defining a second equi-incremental phase region.