Fire resistant valve
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United States of America Patent
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-
Feb 18, 1986
Grant Date -
N/A
app pub date -
Nov 1, 1983
filing date -
Nov 1, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A normally non-rising stem valve with a stem backseat (67,70) normally maintained in unseated position by a eutectic element (62). A spring (76) urges the backseat into seating position and is placed inwardly of a replaceable stem packing (34) so that upon melting of the eutectic (62) and positive seating of the backseat (67,70), the packing (34) can be replaced.
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