Centrifugal pump device
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United States of America Patent
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Sep 5, 2023
Grant Date -
N/A
app pub date -
Jun 21, 2021
filing date -
Jun 22, 2020
priority date (Note) -
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Abstract
A centrifugal pump device has at least one impeller (16), a circulation connection between a delivery side (22) of the at least one impeller (16) and a suction side (20) of the at least one impeller (16), and a valve arrangement (30, 46) in said circulation connection (44, 54). The valve arrangement (30, 46) has a first valve mode providing a pressure dependent shut-off valve (46) in the circulation connection. The valve arrangement (30, 46) allows a change between the first valve mode and at least one further valve mode. The at least one further valve mode provides at least one fixed closing degree of the circulation connection (44, 54).
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