Sealing system for a valve having biassed sealant under pressure

Details Sealing system for a valve having biassed sealant under pressure Sealing system for a valve having biassed sealant under pressure

1995-06-07

1997-03-04

Cummings, Scott

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 59, 277 72FM, 277188A, F16J 1520

Patent

active

056071655

ABSTRACT:
The sealing system seals a moving element in a valve. The sealing system includes an internal seal between the valve body and moving element proximate the lading and an external seal between the valve body and moving element proximate the free end of the moving element. A space for sealant is formed around the moving element between the internal and external seals. A load member is provided for pressurizing the sealant within the space to a pressure greater than the fluid pressure of the lading in the valve body cavity and the ambient pressure around the exterior of the valve. An indicator member is provided for detecting any leakage of the sealant past either the internal or external seals.

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