Device for automatic circulation in a waste water pump station
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United States of America Patent
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-
May 15, 1990
Grant Date -
N/A
app pub date -
Jun 22, 1989
filing date -
Sep 13, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device is provided for obtaining automatic circulation in waste water pump stations. At the pressure side of the pump unit, there is a valve which opens during certain times to form a connection between the pump and the pump station to create a circulation. The valve is opened and closed by means of communicating bellows which are controlled by the pressure difference between two sections in the valve having different areas.
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