Vacuum valve for use in an emergency system for reducing the ris

Details Vacuum valve for use in an emergency system for reducing the ris Vacuum valve for use in an emergency system for reducing the ris

1991-03-06

1993-05-25

Schwadron, Martin P.

Fluid handling

Destructible or deformable element controlled

Destructible element

137495, 137526, F16K 1732, F16K 1740

Patent

active

052131270

ABSTRACT:
A vacuum valve for use in a tanker is constructed with means for releasing a supplemental force on the valve body if the pressure drop across the vacuum valve rises substantially above a value designated for the vacuum valve. Such an extraordinary rise of the pressure drop will occur by escape from an injury under the water-line caused by grounding, and the supplemental closing froce will therefore close the valve very fast and will thereby contribute to maintaing a high vacuum in the tank, counteracting continued escape.

REFERENCES:
patent: 2732856 (1956-01-01), Jurs et al.
patent: 4518014 (1985-05-01), McAlpine
patent: 4844113 (1989-07-01), Jones
PCT No. WO90/10168 dated Sep. 1990, Denmark by Sorenson.

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