Device and method for changing the flow resistance of a fluid flow control device
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United States of America Patent
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-
Dec 9, 1997
Grant Date -
N/A
app pub date -
Jul 19, 1995
filing date -
Feb 25, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus and method for variably controlling fluid flow in a closed flow line, especially the flow of a pulp suspension through a headbox of a paper-making machine, includes guiding fluid through a cavity of a conduit having at least two different cross-sectional profiles. Fluid flow resistance is adjusted by changing the contour of an edge defined by the conduit and a transition step connecting the two cross-sections.
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