Patent ID: 9347585
Filing Date: 2016-05-24
CPC Classification: F16K,Y10T

Claim Text:
1. A valve having a packing assembly, the valve comprising: a valve body assembly defining a flow passage and a body cavity perpendicular to the flow passage, the valve body assembly further defining a bore extending from an exterior of the valve body assembly into the body cavity, the bore having an upper bore portion with an enlarged diameter defined by an inner surface of the bore; a valve member moveable between an open position and a closed position, the valve member blocking the flow passage in the closed position, and allowing flow through the flow passage in the open position; a valve stem coupled to the valve member, the valve stem extending from the body cavity to an exterior of the valve body assembly through the bore for moving the valve member from the closed position to the open position, the valve stem having an axis; a first stem packing circumscribing a first portion of the valve stem, and located in the upper bore portion; a first packing retainer having a collar that limits axial movement of the first stem packing, and further having a first retainer body defining an inner cavity, and wherein the first stem packing floats separate from the first packing retainer so that the first stem packing is free of energization by the first packing retainer; a second stem packing circumscribing a second portion of the valve stem, and located in the inner cavity of the first packing retainer; a second packing retainer having a neck compressingly engaging the second stem packing, and further having a retainer shoulder engaging the first packing retainer; and a retaining assembly coupled with the valve body assembly for applying axial force to the second packing retainer.