초록 ▼

Compact stuffing box packing assemblies of the present application include high density metal inserted braided end rings of graphite which have each been die formed to have angled facing surfaces and a plurality of center Preform rings is disclosed In one embodiment, three low density graphite Prefo

Compact stuffing box packing assemblies of the present application include high density metal inserted braided end rings of graphite which have each been die formed to have angled facing surfaces and a plurality of center Preform rings is disclosed In one embodiment, three low density graphite Preform rings having angled facing surfaces are contained between the high density braided end rings. The facing surfaces of the Preform rings extend at a different angle relative to the longitudinal axis of the packing assembly than do the facing surfaces of the braided end rings. The braided end rings provide a support function for the Preform rings as well as a stem wiping function. In another embodiment, additional Preform support rings made of the same material as the end rings are positioned between the low density Preform rings. A further embodiment disclosed includes replacing two of the three low density graphite Preform rings having angled facing surfaces with Preform support rings made of high density metal inserted braided end rings of graphite which have each been die formed to have angled facing surfaces. A still further embodiment includes having the end rings and the center rings made of high density metal inserted braided end rings of graphite which have each been die formed to have angled facing surfaces.

대표청구항 ▼

[ What is claimed is:] [1.] A packing for a stuffing box comprising:at least one center ring; andan end ring, responsive when axial compressive force is applied to the packing, for forcing the material adjacent one radial edge of a first end of one the at least one center ring to move axially and ra

[ What is claimed is:] [1.] A packing for a stuffing box comprising:at least one center ring; andan end ring, responsive when axial compressive force is applied to the packing, for forcing the material adjacent one radial edge of a first end of one the at least one center ring to move axially and radially in a direction away from the at least one center ring and for further compressing the material into an impervious and effective seal, the end ring comprising:braided graphite tape stock having a density of at least about 1.8 g/cc; andinserts, operatively dispersed throughout the braided graphite tape stock.