NON-RETURN VALVE FOR AN EXHAUST DUCT OF FLUE GASSES
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United States of America Patent
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N/A
Issued Date -
Sep 24, 2009
app pub date -
Mar 17, 2009
filing date -
Mar 19, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention regards a non-return valve for a exhaust duct of flue gases of a boiler, comprising a valve body in which a passage opening of flue gases is defined, to said valve body a obturator being associated which, in a determined operating condition, closes said opening, said obturator comprising a first swing element, hinged on said valve body at said passage opening of flue gases. Advantageously, said obturator comprises a second swing element, hinged on said valve body at said passage opening of flue gases, said first and second swing elements being hinged at or in proximity to a middle plane of said opening.
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