VENT AND RELIEF VALVE
First Claim
1. A vent and relief valve comprising:
- a valve body in fluid communication with the interior of a tank containing a fluid comprising;
a vent valve, the vent valve being capable of being configured into an open position to vent fluid from the interior of the tank;
a relief valve, the relief valve being capable of configured into an open position to relieve pressure within the tank when the pressure within the tank exceeds a predetermined pressure, the relief valve also being capable of engaging the vent valve to form a seal to substantially prevent fluid from flowing from the tank;
the vent valve and relief valve arranged and disposed in a coaxial configuration within the valve body; and
the valve body, including a valve seat, having a first surface and a second surface, the first surface releasably engaging the vent valve when the vent valve is in a closed position; and
the second surface releasably engaging the relief valve when the relief valve is in a closed position.
1 Assignment
0 Petitions
Accused Products
Abstract
A vent and relief valve having a valve body that is in fluid communication with the interior of a tank containing a fluid. A vent valve and relief valve are positioned within the valve body. The vent valve is capable of being configured into an open position to vent fluid from the interior of the tank. The relief valve is capable of being configured into an open position to relieve pressure within a tank. The relief valve is also capable of engaging the vent valve to form a seal to substantially prevent fluid from flowing from the tank. The valve body also includes a valve seat having a first surface that releasably engages the vent valve when the vent valve is in a closed position and a second surface that releasably engages the relief valve when the relief valve is in a closed position.
17 Citations
20 Claims
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1. A vent and relief valve comprising:
a valve body in fluid communication with the interior of a tank containing a fluid comprising;
a vent valve, the vent valve being capable of being configured into an open position to vent fluid from the interior of the tank;
a relief valve, the relief valve being capable of configured into an open position to relieve pressure within the tank when the pressure within the tank exceeds a predetermined pressure, the relief valve also being capable of engaging the vent valve to form a seal to substantially prevent fluid from flowing from the tank;
the vent valve and relief valve arranged and disposed in a coaxial configuration within the valve body; and
the valve body, including a valve seat, having a first surface and a second surface, the first surface releasably engaging the vent valve when the vent valve is in a closed position; and
the second surface releasably engaging the relief valve when the relief valve is in a closed position.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for venting or relieving pressure on a tank comprising:
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providing a tank for storage of cryogenic liquefied gases;
providing a vent and relief valve in communication with the interior of the tank having a vent valve and a relief valve arranged and disposed in a coaxial configuration;
sensing a pressure in the interior of the tank;
configuring the relief valve into an open position in response to a sensed predetermined pressure in the interior of the tank;
configuring the relief valve into a closed position in contact with a valve seat when the pressure in the interior of the tank is less than the sensed predetermined pressure;
configuring the vent valve into an open position when venting of cryogenic liquefied gases from the interior of the tank is desired; and
configuring the vent valve into a closed position when no venting of cryogenic liquefied gases from the interior of the tank is desired. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification