| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a flow rate adjusting valve that can hold a needle valve in a lock release position without making a lock nut corotate together with the needle valve even if the needle valve is turn-operated by releasing a lock at flow rate adjustment, in the flow rate adjusting valve which is constituted so that the needle valve is locked by the lock nut. <P>SOLUTION: An annular ring member 5 is protrusively arranged at the upper side end of a valve body 1 which makes the needle valve 2 engaged therewith in the vertical direction and in a progressing/contacting manner so as to surround a valve rod portion protruded from the valve body 1. Alternatively, a protrusion 9 having internal/external peripheral walls 9a, 9b is formed at the lock nut 8 engaged with a valve rod 2a of the needle valve 2, an O-ring 10 attached to the lower end of the internal periphery of the outside peripheral wall 9a is slidably and tightly adhered to the external periphery of the annular ring member 5 which is inserted between the internal/external peripheral walls 9a, 9b, and the lock nut 8 is prevented from corotating together with the needle valve 2 due to a friction force generated by the slide contact of the O-ring 10. <P>COPYRIGHT: (C)2012,JPO&INPIT |
