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1. WO2020117747 - SIÈGES DE SOUPAPE, ENSEMBLES SOUPAPES ET PROCÉDÉS ASSOCIÉS

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

AMENDED CLAIMS

received by the International Bureau on 03 April 2020 (03.04.2020)

[Claim 1] A valve seat comprising:

an insert comprising a first polymer material, the insert configured to be positioned proximate and to contact a valve member and define a portion of a seal between the valve member and a valve body in which the valve member is positioned, the insert having a primary seating surface to define the portion of the seal with the valve member; and an outer housing comprising a second polymer material, at least a portion of the insert configured to be positioned within the outer housing, the outer housing configured to be positioned between the insert and the valve body to define another portion of the seal between the valve member and the valve body, the outer housing having a secondary seating surface to define the another portion of the seal with the valve member, wherein the second polymer material of the outer housing exhibit a hardness that is greater than a hardness of the first polymer material of the insert.

[Claim 2] The valve seat of claim 1, wherein an entirety of the insert comprises the first polymer material, and wherein an entirety of the outer housing comprises the second polymer material.

[Claim 3] The valve seat of claim 1, wherein the outer housing defines a recess, and wherein the insert is received in the recess.

[Claim 4] The valve seat of claim 3, wherein an entirety of an axial extent of the insert is received within an axial extent of a portion of the outer housing defining the recess.

[Claim 5] The valve seat of claim 1, wherein the first polymer material has a

Rockwell R scale hardness less than 100 and greater than 50.

[Claim 6] The valve seat of claim 5, wherein the second polymer material has a

Rockwell R scale hardness greater than 100 and less than 150.

[Claim 7] The valve seat of any one of claims 1 through 6, further comprising an outer body seal positioned at an outer lateral extent of the outer housing, the outer body seal configured to at least partially define another portion of the seal between the valve member and the valve body.

[Claim 8] The valve seat of claim 7, wherein the outer body seal and the insert comprise substantially similar materials configured to elastically deform at substantial the same level of force.

[Claim 9] The valve seat of claim 7, wherein the outer housing comprises an

annular groove configured to receive a portion of the outer body seal in the annular groove.

[Claim 10] A valve assembly comprising:

a valve body comprising at least one port;

a valve member positioned within the valve body and configured to se lectively enable fluid to pass through the at least one port in the valve body; and

at least one valve seat comprising:

a seat member comprising a polymer material, the seat member po sitioned adjacent and configured to seal against the valve member; and a support member comprising another polymer material, the support member positioned between the seat member and the valve body and configured to seal against the valve body, wherein an axial extent of the seat member is received within an axial extent of a recess defined by the support member.

[Claim 11] The valve assembly of claim 10, wherein the valve assembly comprises a ball valve and the valve member comprises a rotatable ball positioned in the valve body.

[Claim 12] The valve assembly of claim 10, wherein the another polymer material of the support member exhibits a hardness that is greater than a hardness of the polymer material of the seat member.

[Claim 13] The valve assembly of claim 12, wherein the seat member has a

Rockwell R scale hardness less than 70 and greater than 50.

[Claim 14] The valve assembly of claim 13, wherein:

the seat member comprises a material selected from the group consisting of tetrafluoroethylene, polytetrafluoroethylene, modified polytetrafluoroethylene, and reinforced polytetrafluoroethylene; and the support member comprises a material selected from the group consisting of nylon plastics, polyaryletherketone, polyoxymethylene, carbon filled PTFE, and polychlorotrifluoroethylene.

[Claim 15] The valve assembly of any one of claims 10 through 14, wherein the seat member is received within a portion of the support member.

[Claim 16] The valve assembly of claim 15, wherein the support member spaces and separates the seat member from the valve body.

[Claim 17] The valve assembly of any one of claims 10 through 14, wherein the support member comprises a separate body sealing member configured to contact and seal against the valve body.

[Claim 18] The valve assembly of claim 17, wherein the body sealing member

comprises a material having a hardness that is substantially similar to a hardness of the polymer material of the seat member.

[Claim 19] 19. The valve assembly of any one of claims 10 through 14, wherein the at least one valve seat comprises the valve seat of any one of claims 1 through 9.

[Claim 20] 20. A method of providing a seal in a ball valve, the method

comprising:

positioning a first section of a seat comprising a first polymer material adjacent a movable ball of the ball valve;

positioning a second section of the seat comprising a second polymer material adjacent a body of the ball valve;

forcing the movable ball into the seat to form a seal between the movable ball and the valve body with the seat; and

defining the seal between the movable ball and the valve body with the first section having a primary seating surface and with the second section having a secondary seating surface.

[Claim 21] 21. The method of claim 20, further comprising deforming a portion of the second section of the seat comprising a third polymer material into the valve body.