| 摘要 |
There is provided a two-port valve in which a deviation of a degree of parallelization of a valve member and a valve seat can be corrected automatically, which has excellent airtightness, and in which assembly and replacement of the valve member are easy. For this purpose, a shoulder portion 51 and a small-diameter portion 52 are formed in a vicinity of an end portion of a shaft 15, a groove portion 55 into which a snap ring 54 is mounted is formed in a vicinity of a tip end portion of the small-diameter portion, a through hole into which the small-diameter portion 52 is inserted and an annular stepped portion formed by increasing a diameter of a portion of the through hole are provided to the valve member 25, a sealant 65 for providing sealing between the shaft and the valve member is mounted to the stepped portion, a plate 66 is provided between the valve member 25 and the snap ring 54, and the valve member 25 is locked while pressing the sealant 65 mounted to the stepped portion and while being pushed against the shoulder portion 51 by the snap ring 54 mounted into the groove portion 55 and the plate 66.
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