Pressure-reducing valve, and aircraft fueling system incorporating the same
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United States of America Patent
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Feb 2, 1993
Grant Date -
N/A
app pub date -
Sep 30, 1991
filing date -
Sep 30, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There is disclosed a pilot operated pressure-reducing valve system incorporating a main valve and a pilot valve, the latter being either near or remote from the main valve. The pilot and main valves cooperate with each other in such manner that the main valve will close very rapidly, this being important in aircraft fueling systems for example. Two related poppets are provided in the pilot valve, one such poppet being adapted to permit high flow for achievement of the substantially instantaneous main valve closure.
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