Diaphragm valve
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United States of America Patent
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-
Apr 10, 1990
Grant Date -
N/A
app pub date -
Sep 26, 1988
filing date -
Sep 26, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A diaphragm valve includes a valve body adapted to receive a replaceable diaphragm subassembly. The subassembly includes a sleeve closely received in the valve body. An actuating stem extends through the sleeve and includes a composite diaphragm welded at one end. An intermediate portion of the stem is threadedly received in a closure ring. The closure ring defines a radial gap with a closing gap to permit adjustment of the stem relative to a valve seat. A peripheral portion of the composite diaphragm is clampingly engaged between the valve body and sleeve. The composite diaphragm includes a metal layer having an elastomer bonded to one face to provide superior sealing and strength properties.
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