Apparatus for selectively sampling filter backwash fluid
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United States of America Patent
Stats
-
Mar 12, 1996
Grant Date -
N/A
app pub date -
Dec 7, 1993
filing date -
Jun 18, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention relates to monitoring apparatus and, in particular, but not exclusively to such apparatus for use in association with mains water supply facilities. A water works 10 has a water main 12, in which is located a filtration unit 13 having a filter 17. A pressure transducer 17a monitors the pressure drop across the filter 17 to initiate backwash. The conditions of backwash are monitored by a control unit 20 which operates valves 21 to 24 so that when abnormal conditions are detected a sample of the backwash fluid can be captured in reservoirs 25 to 27 in accordance with the degree of abnormality.
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Family
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Cited Art Landscape
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