Pilot operated gas regulator with diaphragm protection
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United States of America Patent
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Oct 25, 2016
Grant Date -
Dec 4, 2014
app pub date -
Apr 15, 2014
filing date -
Jun 3, 2013
priority date (Note) -
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Abstract
A method of controlling a regulator with a pilot device includes periodically detecting an outlet pressure at an outlet of the regulator with a feedback pressure sensor. The method also includes comparing each detected outlet pressure with a set-point control pressure. Additionally, the method includes opening an exhaust valve when a detected outlet pressure is greater than the set-point control pressure so that a loading gas, which is applied to a top surface of a diaphragm of the regulator, exhausts out through the exhaust valve to reduce loading on the diaphragm. The method further includes sensing a loading pressure in the outlet port with a loading pressure sensor after opening the exhaust valve and comparing the loading pressure to a predetermined minimum threshold pressure. When the loading pressure is equal to or less than the predetermined minimum threshold value, the method includes closing the exhaust valve.
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