<p>A valve is disclosed which comprises, a body flow passages, a chamber and a valve closure element. Stem back seating means are provided on a bonnet in response to axial movement of the stem as well as a fusible ring above which a first bearing surrounding the stem is arranged. This bearing cooperates with the ring and the bonnet to prevent axial movement of the stem. A radial flange is arranged between the first bearing and the fusible ring.</p>
申请公布号
EP0247275(A2)
申请公布日期
1987.12.02
申请号
EP19870101034
申请日期
1984.03.06
申请人
FMC CORPORATION
发明人
REGITZ, ALFRED PAUL;KEENE, KENDALL EUGENE;RIESS, RONALD LOUIS;BARRETT, STEPHEN PHILLIP;KOLEILAT, BASHIR MOHAMMAD;WILLIAMS, MICHAEL RAYE;JENNINGS, CHARLES EDWARD;MCINTYRE, JOHN NOLAN