Relieving valve with surge control for fluid storage tank

Details Relieving valve with surge control for fluid storage tank Relieving valve with surge control for fluid storage tank

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F16K 31/12 (2006.01) B65D 90/34 (2006.01) F16K 17/04 (2006.01) F16K 17/36 (2006.01)

Patent

CA 1264141

ABSTRACT OF THE DISCLOSURE A relieving valve for a fluid or liquid storage tank to permit release of pressure from inside the tank as necessary. A piston is movable within the valve to open the same to atmos- phere as pressure builds up slowly therewithin. Upon occurrence of a sudden or rapid pressure rise in the tank, such as when the fluid therein surges against the valve, a snubber assembly in the valve is moved by said pressure rise to a partially closed position to impede the rate at which pressure can build within the valve and thus increase the time before which the valve opens to atmosphere.

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