BALL VALVE SEAT ASSEMBLY HAVING A SWAGED SEAT RING TO RETAIN THE FACE SEAL

摘要

BALL VALVE SEAT ASSEMBLY HAVING A SWAGED SEAT RING TO RETAIN THE FACE SEAL James M. Fowler George A. Moran Houston, Texas A ball valve seat assembly includes a seat ring for mounting in a ball valve seat pocket and an annular face seal mounts on one end of the seat, ring. The resilient annular face seal member is mounted in a groove in the seat member with one end portion exposed to seal against a ball valve member. The annular seal member has an enlarged end portion located in the closed end of the annular groove. An inner wall portion of the seat ring is permanently deformed radially outwardly over the enlarged portion of the seal ring to anchor it in place in the seat ring. Deforming of the inner wall portion is done by swaging the seat ring.