Method of determining filter pluggage by measuring pressures
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United States of America Patent
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Jun 14, 1994
Grant Date -
N/A
app pub date -
Dec 7, 1992
filing date -
Dec 7, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method to determine differential filter pressure caused by filter pluggage in a high pressure liquid system operated by a computer-operated control valve without the need for a pressure sensor coupled to the filter by corerlating the percent the control valve is open with the differential pressure of the filter. A signal is provided when the percentage of time the control valve is open exceeds a predetermined time and the filter is replaced in response to the signal.
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