LIQUID FILLED PRESSURE/VACUUM VALVE FOR PETROLEUM UNDERGROUND STORAGE TANKS
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United States of America Patent
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Issued Date -
Jun 14, 2012
app pub date -
Feb 21, 2012
filing date -
Aug 1, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A liquid filled pressure/vacuum valve for underground storage tanks has a body having an inlet coupled to the UST and an outlet coupled to atmosphere. The valve has a suction zone disposed in the body and fluidly coupled to the inlet. The valve has a pressure zone disposed in the body and fluidly coupled to the outlet, with the suction zone in fluid communication with the pressure zone. The valve has a separator disposed in fluid communication with the outlet and the pressure zone, and a fluid that flows between the suction zone and pressure zone. The flow of fluid is determined by an increased force due to a pressure differential between the suction zone and pressure zone.
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