| 摘要 |
PROBLEM TO BE SOLVED: To restrain operating noise of a check valve by enlarging the section of passage to which area of a passage from an inlet passage to a valve chamber varies at end of inlet side of a valve body for the check valve. SOLUTION: The valve chamber 29 is formed between the inlet passage 28 and outlet 24 and a conical valve seat 29a is formed between the inlet passage 28 and the valve chamber 29. A contact face 35c of the valve body 35 opposite the valve seat 29a is configured as a semisphere. A conical part 35d, projecting from center of the contact face 35c on the valve body 35 to axis of center of the inlet passage 28, is formed to be integrated with the contact face 35c.
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