Control valve
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United States of America Patent
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Jan 31, 2017
Grant Date -
Mar 26, 2015
app pub date -
Sep 10, 2014
filing date -
Sep 25, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A valve element has a packing material, whose one side surface touches and leaves a valve seat as a sealing surface, and a support member, which is driven in opening and closing directions of a valve section by actuating an actuator. The support member includes a supporting surface, which is in contact with a side surface of the packing material opposite to the sealing surface of the packing material, and an engagement part, which supports a peripheral edge part of the packing material in a manner such that the engagement part is engaged with the peripheral edge part. A ring-shaped fluid flow passage is formed between the supporting surface of the support member and the packing material, and this fluid flow passage communicates with an upstream passage.
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