Pressure loaded service regulator with pressure balanced trim
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United States of America Patent
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Aug 14, 2012
Grant Date -
Mar 25, 2010
app pub date -
Apr 21, 2009
filing date -
Apr 21, 2008
priority date (Note) -
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Abstract
A gas regulator includes an actuator, a regulator valve, and pressure loading device. The pressure loading device provides a pressure load to a surface of a diaphragm of the actuator to act against a downstream pressure being applied to the opposite surface of the diaphragm and being controlled by the regulator. As the downstream pressure varies and the diaphragm displaces to move a control element to regulate the downstream pressure, the pressure loading device maintains a specified load pressure. The regulator may further include a balanced trim applying a balancing force to offset a force of an upstream pressure on the control element.
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