SPHERICAL ANNULAR SEAL MEMBER

摘要

Disclosed is a sphered-band sealing object (34) which comprises: a sphered-band base (32) defined by a cylindrical inner surface (28), a partly protrudent spherical surface (29), and annular edge surfaces (30, 31); and an outer layer (33) integrated with the partly protrudent spherical surface (29). The sphered-band base (32) comprises: a reinforcement (5) constituted of a wire gauze (4); and a heat-resistant material (6) which comprises expanded graphite and a phosphate and which has been intermingled and integrated with the reinforcement (5). The outer layer comprises: a heat-resistant material (6) comprising expanded graphite and a phosphate; and a reinforcement (5) which is constituted of a wire gauze (4) and which has been intermingled and integrated with the heat-resistant material (6). The expanded graphite contained in the heat-resistant material (6) has an ash content of 0.1 mass% or lower and a graphite content of 99.7 mass% or higher.