Liquid filled pressure/vacuum valve for petroleum underground storage tanks
First Claim
1. A liquid filled pressure/vacuum valve for underground storage tanks comprising:
- a body having an inlet coupled to the underground storage tank and an outlet coupled to atmosphere;
a suction zone disposed in said body and fluidly coupled to said inlet;
a pressure zone disposed in said body and fluidly coupled to said outlet, said pressure zone in fluid communication with said suction zone;
a separator disposed in fluid communication with said outlet and said pressure zone; and
a fluid disposed in said body and configured to flow between said suction zone and said pressure zone, said flow of said fluid is determined by an increased force due to a pressure differential between said suction zone and said pressure zone.
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Accused Products
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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Citations
28 Claims
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1. A liquid filled pressure/vacuum valve for underground storage tanks comprising:
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a body having an inlet coupled to the underground storage tank and an outlet coupled to atmosphere; a suction zone disposed in said body and fluidly coupled to said inlet; a pressure zone disposed in said body and fluidly coupled to said outlet, said pressure zone in fluid communication with said suction zone; a separator disposed in fluid communication with said outlet and said pressure zone; and a fluid disposed in said body and configured to flow between said suction zone and said pressure zone, said flow of said fluid is determined by an increased force due to a pressure differential between said suction zone and said pressure zone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A liquid filled pressure/vacuum valve for underground storage tanks comprising:
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a body having an inlet coupled to the underground storage tank and an outlet coupled to atmosphere, said body having an interior opposite and exterior and a top opposite a bottom; a first baffle coupled to said body at a position above said inlet, said first baffle configured to create a first wide flow passage and a first narrow flow passage; a second flow direction shield physically coupled to said body at a position below said inlet, said second flow direction shield defining a portion of said first narrow flow passage; a second baffle physically coupled to said bottom of said body, said second baffle configured to create a second wide flow passage and a second narrow flow passage, said second narrow passage is defined by said first baffle and said second baffle; a first flow direction shield coupled to said body at a position above said first baffle, said first flow direction shield defining a portion of said second narrow flow passage; a fluid disposed in said bottom of said body, said fluid configured to flow between said first wide flow passage, said first narrow flow passage, said second wide flow passage, and said second narrow flow passage, said flow of said fluid is determined by an increased force due to a pressure differential between said first wide flow passage and said first narrow flow passage and said second wide flow passage and said second narrow flow passage; and a separator coupled to said body proximate said outlet, said separator configured prevent escape of said fluid to said atmosphere and to return said fluid to said second wide flow passage. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. A liquid filled pressure/vacuum valve for underground storage tanks comprising:
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a suction zone having an inlet fluidly coupled to the underground storage tank, said suction zone chamber including said inlet, an upper chamber and a suction zone chamber, said upper chamber is in fluid communication with said suction zone chamber; a pressure zone having an outlet fluidly coupled to atmosphere and including said outlet, a lower chamber, and a pressure zone chamber, said lower chamber is in fluid communication with said pressure zone chamber, and said pressure zone chamber is in fluid communication with said suction zone chamber; and a fluid disposed in and configured to flow between said suction zone and said pressure zone, said flow of said fluid is determined by an increased force due to a pressure differential between said suction zone and said pressure zone. - View Dependent Claims (25, 26, 27, 28)
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Specification