Relief valve
AssigneeCurtiss-Wright Flow Control Corporation
InventorsErwin R.S. Cortez, Nishit Dave, James E. Latshaw, II
Life of this patent
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Abstract
A pressure relief valve includes a nozzle defining a bore and an outlet at an end of the bore, the outlet having a central axis; and a disc assembly that is linearly movable along the central axis to selectively engage the nozzle. The disc assembly includes a disc and a holder defining a disc cavity that accommodates the disc. Moreover, the holder includes a holder surface extending outward from a perimeter of the disc cavity, substantially radial to the central axis, and a frustoconical skirt surface extending outward from an outer perimeter of the holder surface. A ratio of an outer diameter of the holder surface to a diameter of the outlet is from 1.10 to 1.30.
Claims20
A pressure relief valve comprising:
- a nozzle defining a bore and an outlet at an end of the bore, the outlet having a central axis;
- and
- a disc assembly that is linearly movable along the central axis to selectively engage the nozzle, the disc assembly comprising:
- a disc, and
- a holder defining a disc cavity that accommodates the disc, wherein the holder includes:
- a holder surface extending outward from a perimeter of the disc cavity, substantially radial to the central axis, and
- a frustoconical skirt surface extending outward from an outer perimeter of the holder surface,
- wherein the nozzle includes a nozzle surface that faces the holder surface and extends substantially radial to the central axis, and a frustoconical chamfer surface that extends outwardly from an outer perimeter of the nozzle surface, and
- wherein a ratio of an outer diameter of the holder surface to a diameter of the outlet is from 1.10 to 1.30.
A pressure relief valve comprising:
- a nozzle defining a bore and an outlet at an end of the bore, the outlet having a central axis;
- and
- a disc assembly that is linearly movable along the central axis to selectively engage the nozzle,
- wherein the bore comprises:
- a first portion adjacent to the outlet and having a first diameter,
- a second portion spaced from the outlet and having a second diameter that is smaller than the first diameter, wherein a ratio of the first diameter to the second diameter is less than or equal to 1.50, and
- a transition portion that extends from the first portion to the second portion, and
- wherein the nozzle has a frustoconical bore surface that defines the transition portion of the bore, wherein an angle of the frustoconical bore surface relative to the central axis is from 10° to 35°.
A pressure relief valve comprising:
- a nozzle defining a bore and an outlet at an end of the bore, the outlet having a central axis, wherein the nozzle includes a nozzle surface that extends substantially radial to the central axis;
- and
- a disc assembly that is linearly movable along the central axis to selectively engage the nozzle, the disc assembly comprising:
- a disc, and
- a holder defining a disc cavity that accommodates the disc, wherein the holder includes:
- a holder surface that extends outwardly from a perimeter of the disc cavity and faces the nozzle surface, the holder surface extending substantially radial to the central axis, and
- a frustoconical skirt surface extending outward from an outer perimeter of the holder surface,
- wherein the disc assembly is linearly movable between a first position in which the disc engages the nozzle and a second position in which the disc is spaced from the nozzle,
- wherein in the first position, the nozzle and disc assembly define an annular huddle chamber therebetween, the huddle chamber being radially bound by the disc and the outer perimeter of the holder surface, and axially bound by the holder surface and nozzle surface, and
- wherein the huddle chamber has a cross-section with an area that is 0.02 in2 or less.
Dependencies are inferred from the claim text.