Patent ID: 8714560
Filing Date: 2014-05-06
Classification: F16J,F16K,Y10T

Abstract:
1. A seal assembly for use with fluid valves comprising: a first seal having a first cavity and first end portions that project toward an opening of the first cavity, the first end portions configured to retain a first spring in the first cavity; a second seal having a second cavity and second end portions that project toward an opening of the second cavity, the second end portions configured to retain a second spring in the second cavity, the second seal to be positioned opposite the first seal, the first and second seals to sealingly engage a closure member of a valve and a sealing surface opposite the closure member; a spacer ring at least partially disposed within the cavities of the first and second seals to prevent the first and second seals from contacting each other, the spacer ring fixed in position relative to the first and second seals along a longitudinal axis of the closure member, wherein a maximum thickness of the spacer ring is less than respective widths of the first and second cavities; a back-up ring adjacent the first spring-loaded seal or the second spring-loaded seal; and a piston ring adjacent the back-up ring, the back-up ring and the piston ring to maintain the position of the first and second seals relative to the valve plug.