초록 ▼

A stuffing box especially for a high pressure steam valve has a plurality of packing rings including at least one laminate ring flanking a coiled graphite pressed ring, the laminate ring consisting of a stack of pressed expanded graphite foil annular disks between which and flanking which stainless

A stuffing box especially for a high pressure steam valve has a plurality of packing rings including at least one laminate ring flanking a coiled graphite pressed ring, the laminate ring consisting of a stack of pressed expanded graphite foil annular disks between which and flanking which stainless steel metal foil layers can be provided.

대표청구항 ▼

A stuffing box seal assembly, comprising: a seal housing formed with a seal chamber opening at a surface of said housing and surrounding a spindle movable relative to said housing; a packing gland surrounding said spindle and tightenable against said housing; and a seal in said chamber under compres

A stuffing box seal assembly, comprising: a seal housing formed with a seal chamber opening at a surface of said housing and surrounding a spindle movable relative to said housing; a packing gland surrounding said spindle and tightenable against said housing; and a seal in said chamber under compression from said gland, said seal comprising: a coiled graphite pressed ring in said chamber and including a spirally coiled strip of expanded graphite having turns interleaved with a metal strip extending around said spindle and under axial compression, and at least one laminate ring on an axial side of said coiled graphite pressed ring, said laminate ring comprising a plurality of stacked annular disk layers of expanded graphite extending generally transversely to an axis 7 of said spindle and axially pressed toward each other and limiting adhesion of material from said coiled graphite pressed ring to said spindle upon movement thereof relative to said housing.