Manufacturing valve trim to abate valve noise

A valve, comprising:

• a closure member;
• and
• a cage surrounding at least part of the closure member, the cage comprising a bore with an axis, the cage incorporating a flow pathway having a contiguous inner surface that extends between openings, one each found on an inside surface of the bore and an outside surface of the cage, the openings being offset along the axis so that the opening on the inside surface is in a first section of the cage that is within a maximum travel of the closure member and the opening on the outside surface is in a second section of the cage that is outside of the maximum travel of the closure member,
• wherein the openings are angularly offset from one another.

A valve, comprising,

• a closure member;
• and
• a cage surrounding at least part of the closure member, the cage comprising a bore with an axis, the cage incorporating a flow pathway having a contiguous inner surface that extends between openings, one each found on an inside surface of the bore and an outside surface of the cage, the openings being offset along the axis so that the opening on the inside surface is in a first section of the cage that is within a maximum travel of the closure member and the opening on the outside surface is in a second section of the cage that is outside of the maximum travel of the closure member,
• wherein the flow pathway is configured to direct flow through the cage in a helical direction relative to the axis of the bore.

A valve, comprising:

• a closure member;
• and
• a cage surrounding at least part of the closure member, the cage comprising a bore with an axis, the cage incorporating a flow pathway having a contiguous inner surface that extends between openings, one each found on an inside surface of the bore and an outside surface of the cage, the openings being offset along the axis so that the opening on the inside surface is in a first section of the cage that is within a maximum travel of the closure member and the opening on the outside surface is in a second section of the cage that is outside of the maximum travel of the closure member, and
• a through-hole in the cage having an axis perpendicular to the axis of the bore.

A valve, comprising:

• a closure member;
• and
• a cage surrounding at least part of the closure member, the cage comprising a bore with an axis, the cage incorporating a flow pathway having a contiguous inner surface that extends between openings, one each found on an inside surface of the bore and an outside surface of the cage, the openings being offset along the axis so that the opening on the inside surface is in a first section of the cage that is within a maximum travel of the closure member and the opening on the outside surface is in a second section of the cage that is outside of the maximum travel of the closure member, and
• a plurality of through-holes in the cage, each having an axis perpendicular to the axis of the bore.

A valve, comprising:

• a cage with a bore;
• a closure member moveable in the bore;
• and
• a seat stationary relative to the cage,
• wherein the cage comprises a body with a flow pathway that has an inlet, an outlet, and a contiguous inner surface that extends therebetween,
• wherein the body directs fluid internally along the bore from a first section that is below a maximum position for the closure member to a second section that is above the maximum position for the closure member,
• wherein one of the inlet or the outlet resides in the first section and one of the inlet or the outlet resides in the second section, and
• wherein the outlet is below the maximum position for the closure member.

A valve, comprising:

• a cage with a bore;
• a closure member moveable in the bore;
• and
• a seat stationary relative to the cage,
• wherein the cage comprises a body with a flow pathway that has an inlet, an outlet, and a contiguous inner surface that extends therebetween,
• wherein the body directs fluid internally along the bore from a first section that is below a maximum position for the closure member to a second section that is above the maximum position for the closure member,
• wherein one of the inlet or the outlet resides in the first section and one of the inlet or the outlet resides in the second section, and
• wherein the body is perforated with through-holes that are perpendicular to the bore.