| 摘要 |
PROBLEM TO BE SOLVED: To provide a reciprocating valve capable of accurately measuring the wear amount of a seal of a valve element which is a very small amount by not only simply linking a gauge pin to the reciprocating movement of a stem but also accurately reflecting the reciprocating movement of the stem on the gauge pin while having simple structure. SOLUTION: The reciprocating valve is equipped with the stem 2 connected to a piston 1, the valve element 3 mounted on a tip end of the stem 2, a guide hole 5 formed to penetrate a yoke 41 connected to a valve body 4 from a yoke inner part to a yoke outer part, and the gauge pin 6 that reciprocates by being linked to the reciprocating motion of the stem 2. The gauge pin 6 is inserted in the guide hole 5 in a state of its tip end face 60 projected to the yoke outer part to allow a change of the projection amount to be checked from the guide hole 5. A base end face 61 of the gauge pin 6 is constantly pressed and made to abut on a pin receiving member 1 by biasing force of a spring 62. COPYRIGHT: (C)2009,JPO&INPIT
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