Aperture plates for pressure-regulating valves

摘要

A valve assembly includes a sleeve 12 with an inlet 24 and an outlet 26. A spool 14 is slideably disposed within an interior of the sleeve and is movable along a spool movement axis defined by the sleeve between first and second positions such that a flow area between the inlet and outlet is greater when the spool is in the second position than when the spool is in the first position. An aperture plate 100 seats within the sleeve inlet and is axially adjacent to the spool. The aperture plate defines a core flow aperture (106, Fig. 3) and flow-directing apertures (108, Fig. 3) to centre and straighten a fluid flow entering the sleeve inlet.