Emergency vent valves for storage tanks

Details Emergency vent valves for storage tanks Emergency vent valves for storage tanks

1991-09-30

1992-08-25

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

Fluid opened valve requiring reset

137521, 251297, F16K 1719

Patent

active

051410206

ABSTRACT:
An emergency vent valve for fuel storage tanks comprises a body member and a cover pivotally mounted thereon. The body member has a central passage which is sealed by cover in its closed position. The cover is held in this closed position by resetable latch means, which are responsive to a predetermined storage tank, vapor pressure to release the cover for displacement to an open position. In the open position, the cover is generally upright to provide an alert that the valve has been actuated. The latching means comprise a latch pin, mounted on the cover and a latch link, pivotal on the body member, having a cam surface, which is engaged by the latch pin to hold the cover in its closed position. A screw enables adjustment of the initial position of the latch link to vary the relative angle between the cam surface and the latch pin, to thus adjust the vapor pressure to which the valve is responsive.

REFERENCES:
patent: 889780 (1908-06-01), Gibney
patent: 2852037 (1958-09-01), Downing et al.
patent: 3687157 (1972-08-01), Whitmer
patent: 4109819 (1978-08-01), Kushman et al.
patent: 4788999 (1988-12-01), Dalpane

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