BUTTERFLY VALVE COMPRISING AN ACTUATED SEAL
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United States of America Patent
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Issued Date -
Oct 29, 2020
app pub date -
Jan 17, 2019
filing date -
Jan 19, 2018
priority date (Note) -
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Abstract
A butterfly valve comprising a valve body and a rotatable obturator (3), the rotatable obturator mounted in the valve body for rotation about an axis, arranged to be rotated between a closed condition and an open condition, the rotatable obturator comprising an actuated seal (5) which is arranged to seal against a sealing surface (12a) of the valve body, and the actuated seal comprising a rearward surface (5e) arranged to be acted on by a pressurised fluid, and the seal mounted in the obturator for displacement outwardly from the obturator as the result of application of the pressurised fluid so as to seal against the sealing surface of the valve body in a substantially fluid-tight manner.
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