US 2013/0075644 A1Published application

Valve seat body and valve device

AssigneeKawasaki Jukogyo Kabushiki Kaisha

InventorsYutaka Suzuki, Kaoru Nomichi, Makoto Ninomiya

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Abstract

A valve device includes a valve body and a valve seat body. The valve seat body has a thick cylindrical shape extending in an axis line direction. The valve seat body includes a seal groove on an outer periphery thereof, the seal groove extending in a circumferential direction. The valve seat body includes a large-diameter portion and a small-diameter portion on an inner periphery thereof, the large-diameter and small-diameter portions connected to each other in the axis line direction. The valve seat body includes a valve seat portion between the large-diameter and small-diameter portions, the valve body being seated on the valve seat portion. The position of the seal groove in the axis line direction coincides with the position of the valve seat portion in the axis line direction or is located on a high-pressure side of the position of the valve seat portion in the axis line direction.

Claims20

Dependent claims

A valve seat body having a thick cylindrical shape, comprising:

a valve seat portion on which a valve body is seated;
a first sealing member provided portion provided on an outer periphery of the valve seat body;
a large-diameter portion and a small-diameter portion provided on an inner periphery of the valve seat body;
and
a valve seat portion provided between the large-diameter portion and the small-diameter portion, wherein:
the large-diameter portion has an inner diameter larger than an outer diameter of the valve body configured to move into the large-diameter portion from an axis line direction;
the small-diameter portion has an inner diameter smaller than the outer diameter of the valve body;
and
a position of the first sealing member provided portion in the axis line direction overlaps a position of the valve seat portion in the axis line direction or is located on a high-pressure side of the position of the valve seat portion in the axis line direction.

6 more elements

Dependencies are inferred from the claim text.