Method of controlling a gas adsorption apparatus
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United States of America Patent
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Aug 8, 2006
Grant Date -
Jul 15, 2004
app pub date -
Dec 23, 2003
filing date -
Dec 24, 2002
priority date (Note) -
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Abstract
A method of controlling a gas adsorption apparatus including a sieve bed containing molecular sieve bed material, the bed being cyclically operable in a charge mode to adsorb non-product gas from an air supply thereby to increase the concentration of a product gas in a product gas supply which passes to a product gas line and in a vent mode to desorb the adsorbed non-product gas which passes to a non-product gas line, and there being a passage to permit a restricted amount only of the product gas supply to pass from the product gas supply line to the bed when operating in vent mode, and wherein the method includes operating a variable flow device to permit an increased amount of the product gas supply to pass to the bed when operating in vent mode, under predetermined conditions.
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