| 摘要 |
A composite seal face ring has an inner ring ( 60 ) made of material with good tribological properties, the inner ring ( 60 ) being pre-compressed by an outer ring ( 64 ) with a high tensile strength and a thermal coefficient of expansion substantially equal to that of the inner ring ( 60 ). The seal face ring is assembled by compressing the inner ring ( 60 ) and/or expanding the outer ring ( 64 ) by fluid under pressure, before inserting the inner ring ( 60 ) into the outer ring ( 64 ).
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