Valve cage having zero dead band between noise abatement and high capacity flow sections

摘要

A valve cage for a fluid flow control device includes a hollow cylindrical body, a noise abatement section, a high capacity flow section, and a transition section. The noise abatement section has a plurality of inlet openings, a plurality of outlet openings, and a plurality of tortuous flow paths extending between the inlet and outlet openings. The high capacity flow section is disposed axially adjacent to the noise abatement section and includes a first axial end, a second axial end, and a plurality of primary flow openings. The transition section is defined at an interface between the noise abatement section and the second axial end of the high capacity flow section and includes a plurality of transition openings. The transition section provides a valve cage with zero dead band between the noise abatement and high capacity flow sections when implemented into a fluid flow control device.

主权项

1. A valve cage for a fluid flow control device, the cage comprising:
a hollow cylindrical body having at least one inner cylindrical surface and at least one outer cylindrical surface; a noise abatement section of the hollow cylindrical body, the noise abatement section comprising a plurality of stacked discs collectively defining a plurality of inlet openings formed in the inner cylindrical surface or the outer cylindrical surface, a plurality of outlet openings formed in the other of the inner cylindrical surface and the outer cylindrical surface, and a plurality of tortuous flow paths extending between the inlet and outlet openings; a high capacity flow section of the hollow cylindrical body removably connected and disposed axially adjacent to the noise abatement section, the high capacity flow section comprising a one-piece cylindrical form having a first axial end, a second axial end, and a plurality of primary flow openings spaced circumferentially about the high capacity flow section and between the first and second axial ends; and a transition section of the hollow cylindrical body defined at an interface between the noise abatement section and the second axial end of the high capacity flow section, the transition section including a plurality of transition openings extending radially between the outer cylindrical surface and the inner cylindrical surface, each transition opening including a recess in the second axial end of the high capacity flow section such that the transition section provides a valve cage with zero dead band between the noise abatement and high capacity flow sections when implemented into a fluid flow control device.