Patent ID: 9500300
Filing Date: 2016-11-22
CPC Classification: F16J,F16K,Y10T

Claim Text:
1. A method for repairing a valve intended to control the flow of fluid, the valve including a valve body having ports, a stem for actuating the valve, a yoke tube connected to the valve body including a first packing chamber containing packing materials that circumscribe and engage with the stem to prevent fluid leakage about the stem and a handle; including the steps of: separating the yoke tube and first packing chamber from the valve body; attaching a second packing chamber containing packing materials that circumscribe and engage the stem to the valve body; attaching a body having a thermal release opening to the second packing chamber and, reattaching the yoke tube having the first packing chamber to the body, thereby creating two separate and distinct packing chambers circumscribing and engaging with the stem to prevent fluid leakage about the stem; wherein the second packing chamber creates a primary packing seal against fluid leakage and the first packing chamber creates a secondary packing seal to prevent fluid leakage, wherein upon failure of the primary packing seal the fluid is prevented by the secondary packing seal from escaping to the environment and instead escapes through the thermal release opening.