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US 8,864,106 B2Granted
Valve seat apparatus having positive retention for use with fluid control devices
AssigneeEmerson Process Management Regulator Technologies, Inc.
InventorsTony Alan Durant, Samuel Harold Larsen, Kenneth Roger Schimnowski
Life of this patent
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Abstract
Valve seat apparatus having positive retention for use with fluid control devices are described herein. An example valve seat apparatus includes a metallic ring and an elastomeric ring coupled to the metallic ring and having a sealing surface to sealingly engage a flow control member of the fluid control device. At least a portion of an outer surface of the elastomeric ring includes an annular lip to sealingly engage an annular recess of a body of the fluid control device.
Claims24
A fluid control device, comprising:
- a valve body comprising an aperture, the aperture having a shoulder defining a first groove of the valve body and a first angled surface between the shoulder and an end of the aperture;
- and
- a valve seat comprising a positive retention for use with the fluid control device, the valve seat comprising:
- a metallic ring comprising a first inner circumferential surface and a first outer circumferential surface, the first outer circumferential surface comprising a first protrusion and a second angled surface, the first and second angled surfaces being non-parallel and non-perpendicular relative to an axis extending through the valve seat;
- and
- an elastomeric ring comprising a sealing surface, a second inner circumferential surface, and a second outer inner circumferential surface, the second inner circumferential surface comprising a second groove and a third angled surface, the second outer circumferential surface comprising a second protrusion and a fourth angled surface, the third and fourth angled surfaces being non-parallel and non-perpendicular relative to the axis extending through the valve seat, the sealing surface to be sealingly engaged by a flow control member of the fluid control device, the metallic ring being attached to the elastomeric ring prior to positioning the metallic ring and the elastomeric ring in the valve body of the fluid control device, the third angled surface of the elastomeric ring to matably engage the second angled surface of the metallic ring, the metallic ring disposed in an opening of the elastomeric ring and configured so that the metallic ring is not to engage the flow control member, the sealing surface to be positioned between the metallic ring and the valve body of the fluid control device prior to engagement of the flow control member with the sealing surface and during engagement of the flow control member with the sealing surface, the metallic ring to exert a radial force to the elastomeric ring to urge the first protrusion into the second groove, the second protrusion into the first groove, and the fourth angled surface to matably engage the first angled surface.
3 more elements
A valve seat apparatus having a positive retention for use with a fluid regulator, comprising:
- a substantially rigid support ring coupled to a substantially resilient sealing ring, the rigid support ring comprising a first inner surface and a first outer surface, the first outer surface comprising a first protrusion, the resilient sealing ring comprising a second inner surface, a second outer surface, and a sealing surface, the second inner surface comprising a first recess, the second outer surface comprising a second protrusion and a chamfered portion, the chamfered portion adjacent the second outer surface and opposite the sealing surface, the sealing surface to be engaged by a valve plug of the fluid regulator, the sealing surface being substantially flush with an edge of the rigid support ring when the rigid support ring and the resilient sealing ring are positioned in a valve body of the fluid regulator, the first recess to receive the first protrusion to couple the rigid support ring and the resilient sealing ring, the chamfered portion to slidably engage a curved portion adjacent an opening of the valve body to facilitate the second protrusion being received within a second recess of the valve body, when the valve seat apparatus is positioned within the valve body, the rigid support ring to exert an outward radial force to the resilient sealing ring to urge the first protrusion into the first recess and the second protrusion into the second recess, wherein the second outer surface comprises a first angled surface non-parallel and non-perpendicular relative to an axis extending through the valve seat apparatus when the valve seat apparatus is positioned in the valve body, the first angled surface to matably engage a second angled surface of the valve body when the rigid support ring and the resilient sealing ring are positioned in the valve body.
A fluid regulator, comprising:
- a valve body comprising an inlet, an outlet, an aperture positioned between the inlet and the outlet, and a curved portion adjacent an opening of the aperture, the aperture comprising a shoulder to define a first groove;
- and
- a valve seat disposed within the aperture of the valve body, the valve seat comprising:
- a first ring-shaped portion comprising a first inner surface and a first outer surface, the first outer surface comprising a first protrusion;
- and
- a second ring-shaped portion that surrounds the first ring-shaped portion to be sealingly engaged by a movable valve plug, the second ring-shaped portion comprising a second inner surface, a second outer surface, a sealing surface, and a chamfered portion, the second outer surface comprising a second protrusion to engage the shoulder and to be received by the first groove to retain the valve seat relative to the valve body, the chamfered portion to slidably engage the curved portion adjacent the opening of the aperture to facilitate positioning the first and second ring-shaped portions within the valve body, the second inner surface comprising a second groove to receive the first protrusion of the first ring-shaped portion, the first ring-shaped portion being disposed in an opening of the second ring-shaped portion, the sealing surface to be sealingly engaged by the movable valve plug when the valve seat is retained relative to the valve body, the first ring-shaped portion to exert a radial outward force to the second ring-shaped portion to urge the first protrusion into the second groove and the second protrusion into the first groove, the second outer surface further comprises a first angled surface and the valve body comprises a second angled surface, the first and second angled surfaces being non-parallel and non-perpendicular relative to an axis extending through the valve seat, the first and second angled surfaces to matably engage when the valve seat is retained relative to the valve body.
3 more elements
Dependencies are inferred from the claim text.