| 摘要 |
A valve device includes: a valve stem 4 vertically movably inserted in a staffing box 1; a gland packing 2 interposed between the staffing box 1 and the valve stem 4; a packing flange 9 disposed above the gland packing 2 through a packing follower 3; a spring case 6 that accommodates or holds Belleville springs 5, further abuts the packing flange 9 on its top face, and has groove portions 12 on its peripheral wall; and stud bolts 7 that press the gland packing 2 through the packing flange 9 and the spring case 6.
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