An assembly for a hydraulic component, the assembly comprising: a seal retainer comprising: a radially inward facing surface extending about a longitudinal axis and extending along the longitudinal axis; an axially facing surface extending radially outward from the radially inward facing surface, the axially facing surface facing in a first direction along the longitudinal axis; and an axially facing concave portion formed in the axially facing surface, the axially facing concave portion facing in the first direction and configured to receive a convex face of a sealing member, wherein the axially facing concave portion extends along a curved axis, the curved axis being centred on and circumscribing the longitudinal axis; the assembly further comprising: the sealing member, wherein the convex face is seated in the axially facing concave portion, and wherein the convex face forms an axial end of the sealing member; wherein when the sealing member is pressurized, the sealing member is engaged with the axially facing concave portion of the axially facing surface of the seal retainer to prevent the sealing member from moving in a second direction opposite to the first direction; radially outer and radially inner portions of the sealing member expand radially, relative to the longitudinal axis; and the axially facing surface of the seal retainer partially limits the expansion to reduce stress of the sealing member and the axially facing surface of the seal retainer reinforces a curvature of the sealing member, thereby preventing flattening of the sealing member to improve sealing effectiveness of the sealing member; wherein the convex face faces opposite the axially facing concave portion to allow the convex face and the axially facing concave portion to engage one another; and wherein the convex face circumscribes the curved axis with a radius less than a corresponding radius of the axially facing concave portion to allow the convex face to expand radially outward from the curved axis after abutting a portion of the axially facing surface that defines the axially facing concave portion. a seal retainer comprising: a radially inward facing surface extending about a longitudinal axis and extending along the longitudinal axis; an axially facing surface extending radially outward from the radially inward facing surface, the axially facing surface facing in a first direction along the longitudinal axis; and an axially facing concave portion formed in the axially facing surface, the axially facing concave portion facing in the first direction and configured to receive a convex face of a sealing member, wherein the axially facing concave portion extends along a curved axis, the curved axis being centred on and circumscribing the longitudinal axis; a radially inward facing surface extending about a longitudinal axis and extending along the longitudinal axis; an axially facing surface extending radially outward from the radially inward facing surface, the axially facing surface facing in a first direction along the longitudinal axis; and an axially facing concave portion formed in the axially facing surface, the axially facing concave portion facing in the first direction and configured to receive a convex face of a sealing member, wherein the axially facing concave portion extends along a curved axis, the curved axis being centred on and circumscribing the longitudinal axis; the assembly further comprising: the sealing member, wherein the convex face is seated in the axially facing concave portion, and wherein the convex face forms an axial end of the sealing member; wherein when the sealing member is pressurized, the sealing member is engaged with the axially facing concave portion of the axially facing surface of the seal retainer to prevent the sealing member from moving in a second direction opposite to the first direction; radially outer and radially inner portions of the sealing member expand radially, relative to the longitudinal axis; and the axially facing surface of the seal retainer partially limits the expansion to reduce stress of the sealing member and the axially facing surface of the seal retainer reinforces a curvature of the sealing member, thereby preventing flattening of the sealing member to improve sealing effectiveness of the sealing member; the sealing member, wherein the convex face is seated in the axially facing concave portion, and wherein the convex face forms an axial end of the sealing member; wherein when the sealing member is pressurized, the sealing member is engaged with the axially facing concave portion of the axially facing surface of the seal retainer to prevent the sealing member from moving in a second direction opposite to the first direction; radially outer and radially inner portions of the sealing member expand radially, relative to the longitudinal axis; and the axially facing surface of the seal retainer partially limits the expansion to reduce stress of the sealing member and the axially facing surface of the seal retainer reinforces a curvature of the sealing member, thereby preventing flattening of the sealing member to improve sealing effectiveness of the sealing member; wherein the convex face faces opposite the axially facing concave portion to allow the convex face and the axially facing concave portion to engage one another; and wherein the convex face circumscribes the curved axis with a radius less than a corresponding radius of the axially facing concave portion to allow the convex face to expand radially outward from the curved axis after abutting a portion of the axially facing surface that defines the axially facing concave portion.