| abstract |
A spherical zone seal body (58), comprising a spherical zone shaped substrate (56) specified by a cylindrical inner surface (52), a partially projecting spherical surface (56), and end faces (54, 55), and an outer layer (57) formed integrally with the partially projecting spherical surface (53) of the spherical zone shaped substrate (56), the spherical zone shaped substrate (56) further comprising a reinforcing material (5) formed of a compressed metal net (4) and a heat resistant material including expanded graphite and organic phosphorous compound filling the meshes of the metal net (4) of the reinforcing material (5) and formed integrally with the reinforcing material (5), the outer layer (56) further comprising a heat resistant material formed of a heat resistant sheet material (6) including expanded graphite and organic phosphorous compound and the reinforcing material (5) formed of the metal net (4) formed integrally with the heat resistant material. |