Pressure vessel safety valve
AssigneeThe Commonwealth Industrial Gases Limited
InventorsHector O. M. Boccardo, Thomas W. Jolly
Life of this patent
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Abstract
To vent the contents of a pressure vessel upon failure of the vessel due to overheating or to abnormal pressure increase therein, a safety valve defines two passages through it both leading from the vessel interior to atmosphere. One passage is normally obstructed by a fusible member; the other is normally obstructed by a rupturable disc or like member.
Claims3
A safety valve for a pressure vessel having an exterior and an interior, said safety valve comprising a plug assembly having a first end and a second end and adapted to be mounted on a vessel in an opening with the plug assembly first end on the vessel interior and the plug assembly second end on the vessel exterior;
- means defining a first port and a second port in said plug assembly, said first port being in fluid communication with said plug assembly first end and said second port being in fluid communication with said plug assembly second end;
- means defining a first passage providing fluid communication between said first port and said second port;
- a first member positioned in said first passage to normally obstruct fluid flow therethrough and rupturable in response to a selected pressure arising inside the vessel to permit fluid flow through said plug assembly via said first passage;
- means defining a second passage providing fluid communication between said first port and said second port;
- and a second member positioned in said second passage to normally obstruct fluid flow therethrough and fusible in response to a selected temperature to permit fluid flow through said plug assembly via said second passage.
Dependencies are inferred from the claim text.