Anti-cavitation and noise reduction trim in rotary control valve

A method for obtaining a gradual pressure drop in a rotary control valve, comprising the steps of:

• providing a segmented ball;
• inserting a cartridge into a closely fitting internal cavity defined within the segmented ball;
• and
• wherein the cartridge comprises a plurality of linkages orthogonal to a flow direction of the rotary control valve in a fully opened position;
• wherein the plurality of linkages is arranged into a plurality of rows of linkages;
• wherein each of the plurality of row of linkages is offset from a downstream row of linkages;
• and
• inducing a pressure dropping stage between each of the plurality of rows of linkages.

A cartridge trim for closely fitting, removing, and replacing within a segmented ball of a rotary valve, having an upstream end and a downstream end, and a top half for connecting to a top stem, and a bottom half for connecting to a bottom stem, and configured for reducing and mitigating noise and cavitation of a fluid flow, comprising

• a first set of rows of linkages extending from the top half to the bottom half within the cartridge;
• wherein each subsequent downstream row of the first set of rows of linkages comprises linkages of decreasing size compared to each prior row of the first set of rows of linkages;
• and
• each subsequent downstream row of the first set of rows of linkages is offset from the prior row the first set of rows of linkages via displacement from a front of the cartridge.