Automatic flow control system and apparatus
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United States of America Patent
Stats
-
Mar 29, 2016
Grant Date -
Apr 30, 2015
app pub date -
Dec 31, 2013
filing date -
Oct 31, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A pilot valve assembly for use with a main valve apparatus coupled to a water pipe, includes a differential pilot valve, and first and second pilot valves. An inlet of the differential pilot valve is coupled to a junction and an outlet is coupled to the first pilot valve. The differential pilot valve is responsive to a pressure differential to open and close the differential pilot valve to control water flow therethrough to the first pilot. The first pilot valve is responsive to a first pressure to close the first pilot valve to reduce water flow therethrough. The second pilot valve is coupled to the junction to facilitate water flow through the second pilot valve when the differential valve member is open. The second pilot valve is responsive to a second pressure to close the second pilot valve to reduce water flow therethrough.
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