Butterfly valve having a function for measuring a flow rate and method of measuring a flow rate with a butterfly valve
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United States of America Patent
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May 22, 1990
Grant Date -
N/A
app pub date -
May 5, 1989
filing date -
May 5, 1989
priority date (Note) -
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Abstract
A butterfly valve having a function for measuring a flow rate of a fluid flowing through the butterfly valve includes a main body, a valve shaft fixed rotatably to the main body, a valve member fixed to the valve shaft and mounted rotatably in the main body, a valve opening detection device for detecting a valve opening of the butterfly valve, and a torque detection device for detecting a dynamic torque applied to the valve member around the valve shaft by the fluid.
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