A valve, comprising: a valve body having a valve plug disposed between an outlet and an inlet of the valve body, wherein the valve plug moves between an open position to allow fluid flow through the valve and a closed position to prevent fluid flow through the valve; a cage having a first opening to slidably receive at least a portion of the valve plug and a second opening to control the flow characteristics of fluid through the valve; and a seal assembly disposed adjacent an inner surface of the first opening of the cage and an outer surface of the valve plug to substantially prevent leakage of fluid between the cage and the valve plug when the valve plug is in the closed position; characterized in that the seal assembly comprises: a first seal and a second seal opposite the first seal, wherein the first and second seals (508, 510) are configured to sealingly engage the valve plug and the inner surface of the cage opposite the valve plug and each of the first seal and the second seal includes a spring (418a, 418b) disposed within a respective jacket (420a, 420b), the respective spring (418a, 418b) being configured to urge the respective jacket (420a, 420b) against the inner surface and the valve plug; and a spacer ring disposed between the first and second seals (508, 510) to prevent the first and second seals (508, 510) from contacting each other; wherein the spacer ring is sized to fit within outer surfaces (424a, 424b) of the jackets (420a, 420b) of the first and second seals (508, 510) so that the spacer ring does not contact the valve plug or the inner surface; the spacer ring has a radially facing first side and a radially facing second side opposite the first side; a first gap separates a first portion of the respective spring from the first side of the spacer ring and a second gap separates a second portion of the respective spring from the second side of the spacer ring; and the spacer ring includes an aperture therethrough to enable the flow of pressurized fluid between the first side and the second side of the spacer ring. a valve body having a valve plug disposed between an outlet and an inlet of the valve body, wherein the valve plug moves between an open position to allow fluid flow through the valve and a closed position to prevent fluid flow through the valve; a cage having a first opening to slidably receive at least a portion of the valve plug and a second opening to control the flow characteristics of fluid through the valve; and a seal assembly disposed adjacent an inner surface of the first opening of the cage and an outer surface of the valve plug to substantially prevent leakage of fluid between the cage and the valve plug when the valve plug is in the closed position; characterized in that the seal assembly comprises: a first seal and a second seal opposite the first seal, wherein the first and second seals (508, 510) are configured to sealingly engage the valve plug and the inner surface of the cage opposite the valve plug and each of the first seal and the second seal includes a spring (418a, 418b) disposed within a respective jacket (420a, 420b), the respective spring (418a, 418b) being configured to urge the respective jacket (420a, 420b) against the inner surface and the valve plug; and a spacer ring disposed between the first and second seals (508, 510) to prevent the first and second seals (508, 510) from contacting each other; wherein the spacer ring is sized to fit within outer surfaces (424a, 424b) of the jackets (420a, 420b) of the first and second seals (508, 510) so that the spacer ring does not contact the valve plug or the inner surface; the spacer ring has a radially facing first side and a radially facing second side opposite the first side; a first gap separates a first portion of the respective spring from the first side of the spacer ring and a second gap separates a second portion of the respective spring from the second side of the spacer ring; and the spacer ring includes an aperture therethrough to enable the flow of pressurized fluid between the first side and the second side of the spacer ring. a first seal and a second seal opposite the first seal, wherein the first and second seals (508, 510) are configured to sealingly engage the valve plug and the inner surface of the cage opposite the valve plug and each of the first seal and the second seal includes a spring (418a, 418b) disposed within a respective jacket (420a, 420b), the respective spring (418a, 418b) being configured to urge the respective jacket (420a, 420b) against the inner surface and the valve plug; and a spacer ring disposed between the first and second seals (508, 510) to prevent the first and second seals (508, 510) from contacting each other; wherein the spacer ring is sized to fit within outer surfaces (424a, 424b) of the jackets (420a, 420b) of the first and second seals (508, 510) so that the spacer ring does not contact the valve plug or the inner surface; the spacer ring has a radially facing first side and a radially facing second side opposite the first side; a first gap separates a first portion of the respective spring from the first side of the spacer ring and a second gap separates a second portion of the respective spring from the second side of the spacer ring; and the spacer ring includes an aperture therethrough to enable the flow of pressurized fluid between the first side and the second side of the spacer ring.