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US 5,520,209 AGranted
Fluid relief device
AssigneeThe Dow Chemical Company
InventorsJames R. Goins, John W. Ogle, James R. Ogle
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AssigneeThe Dow Chemical Company
InventorsJames R. Goins, John W. Ogle, James R. Ogle
Estimating the term…
The present invention discloses a fluid relief device for relieving pressure of a fluid stored in a container or tank, or fluid used in a piece of equipment. In one aspect such a device has a body member with a primary channel therethrough in communication with a container of a contained fluid under pressure. When the pressure of the contained fluid under pressure exceeds a predetermined level, the pressure of the contained fluid moves a cover which is sealingly in place to close off the primary channel. During normal conditions the force of the contained fluid is insufficient to move the cover and leakage of the contained fluid past the cover is inhibited by the provision of a barrier fluid supplied into a barrier fluid chamber to oppose the contained fluid, the barrier fluid at a pressure greater than the normal pressure of the contained fluid. Seals may be provided on one or two sides of the barrier fluid chamber--a first seal to seal the primary channel-chamber interface and a second seal to seal the chamber-exterior interface. Fluid under pressure supplied to the chamber may leak past the first seal into the container. In one aspect an inert barrier fluid, e.g. nitrogen is used. Devices according to this invention may be used with pressure relief devices and vacuum relief devices.
A fluid pressure relief device for a container adapted to contain fluid at a normal fluid pressure, the fluid pressure relief device openable in response to a predetermined pressure level of fluid in an interior space within the container, the fluid pressure relief device comprising
The fluid pressure relief device of claim 48 wherein the control monitor apparatus includes alarm apparatus for presenting an alarm when the barrier fluid pressure changes a set amount from a pre-set baseline pressure.
A sealing system for sealing an interface between a fluid pressure relief device's movable cover and a body with a primary channel therethrough for escape of contained fluid from a container on which the fluid relief device is mounted, the fluid pressure relief device openable in response to a predetermined pressure level of contained fluid in an interior space of the container, the contained fluid initially at a normal fluid pressure, the cover movable apart from the body and away from the primary channel by the force of fluid within the interior space of the container that attains a pressure greater than the normal pressure, thereby permitting escape of contained fluid from the interior space of the container through the primary channel, the sealing system comprising
A fluid pressure relief device for a container adapted to contain fluid at a normal fluid pressure, the device comprising
A fluid pressure relief device for a container adapted to contain fluid at a normal fluid pressure, the device comprising
A fluid pressure relief device for a container adapted to contain fluid at a normal fluid pressure, the device comprising
Dependencies are inferred from the claim text.