Relief device for a vacuum vessel

Details Relief device for a vacuum vessel Relief device for a vacuum vessel

1986-02-19

1987-04-28

Cohan, Alan

Fluid handling

Line condition change responsive valves

Direct response valves

137512, 1375276, 1375278, F16K 1503

Patent

active

046605991

ABSTRACT:
A pressure relief device 5 for a vessel having redundant pressure relief capabilities. An annular plate 12 overlies a surface 11 which has an aperature to the vessel. A seal is formed between the surface 11 and annular plate 12. A solid plate 13 overlies the annular plate 12. A seal is formed between the solid plate 13 and annular plate 12. The relief device 5 will open at a first predetermined pressure by lifting the solid plate 13. In the event the seal between solid plate 13 and annular plate 12 should stick the relief device 5 will open at a second slightly higher, predetermined pressure by lifting the annular plate 12 and solid plate 13 together. Hinging means 6 are provided to reclose the pressure relief device 5 when conditions return to normal.

REFERENCES:
patent: 157791 (1874-12-01), Cameron
patent: 2082543 (1937-06-01), Hillman
patent: 4281680 (1981-08-01), Ripert
patent: 4471812 (1984-09-01), Bertsch

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