Multiple rate filter underdrain lateral gas metering plate
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United States of America Patent
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Feb 9, 2021
Grant Date -
Sep 8, 2016
app pub date -
Mar 4, 2016
filing date -
Mar 5, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A filtration system has at least one underdrain lateral, a flume, and at least one metering plate. The metering plate includes a plate member with at least one opening configured to receive liquid or gas therethrough at a first flow rate during a backwash function and is configured to receive liquid or gas therethrough at a second, lower flow rate during filtration. A method of metering gas into a filtration system with a metering plate is also disclosed. The metering plate allows gas to flow into each underdrain lateral at two very different flow rates.
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