Overfill protecting arrangement for a liquid storage tank

Details Overfill protecting arrangement for a liquid storage tank Overfill protecting arrangement for a liquid storage tank

1990-08-07

1991-09-24

Rivell, John

Fluid handling

Systems

System with plural openings, one a gas vent or access opening

137583, 137529, 251 82, 114 74R, B63B 2508

Patent

active

050506390

ABSTRACT:
An overfill protecting arrangement for a liquid storage tank comprises in combination a venting valve and a spill valve. The arrangement is designed for a maximum permissible loading rate, and the venting valve is so dimensioned that at this loading rate the tank pressure will assume an equivalent value substantially lower than a safety limit value prescribed by the authorities. The spill valve is a quick-opening valve, preferably a magnetic value, which has an opening pressure distinctly higher than said equivalent value of the tank pressure and lower than said safety limit value. The drops of pressure caused by a flow of liquid at the loading rate into the venting valve system and out of the fully open spill valve are so co-ordinated that flow of gas out of the spill valve and flow of liquid out of the venting valve cannot occur at any circumstances.

REFERENCES:
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patent: 4144829 (1979-03-01), Conway
patent: 4233922 (1980-11-01), Conway
patent: 4292909 (1981-10-01), Conway
patent: 4482017 (1984-11-01), Morris

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