Flow control valve
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United States of America Patent
Stats
-
Sep 22, 1987
Grant Date -
N/A
app pub date -
Oct 24, 1985
filing date -
Oct 24, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A direct acting flow control valve operative by an actuator responsive to fluid pressure from an external source. The actuator includes a pair of spaced apart pistons and associated rolling diaphragms which define an actuator chamber into which the fluid pressure is admitted, and a separate leakage chamber into which fluid will pass on leaking through a defective diaphragm, the leakage chamber being adapted for communication with an external indicator, shutoff valve or the like.
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Cited Art Landscape
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