| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve rod rotation type valve capable of reducing operating force without having effects on current valve seat sealability, form size, installation space, etc. SOLUTION: A valve rod is split above a packing 11, a contact surface and a groove part capable of coupling split parts of a lower valve rod 4 to an upper valve rod 5 are formed, and they are coupled with each other by a joint 6, to allow only the upper valve rod 5 to rotate, while keeping the lower valve rod 4 unrotatable. Valve opening and closing operation force can thus be reduced without changing outer diameter of a valve, to provide a globe valve of small bore easily modified at site.
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