Diaphragm valve
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United States of America Patent
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Jun 14, 1988
Issued Date -
N/A
app pub date -
Apr 20, 1987
filing date -
May 16, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A diaphragm valve which uses a multiple layer annular metal diaphragm welded about its inner periphery to a valve operating stem. The diaphragm is sealingly clamped about its outer periphery to the valve body and is also clamped about its inner periphery at a location spaced outwardly of the weld to prevent the weld from being subjected to flexure stresses during valve actuation. The actuating assembly is arranged to produce non-rotary, reciprocatory movement of the operating stem through a bonnet mounted rotary actuator. An improved stem tip seal arrangement is also disclosed.
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