...做升降运动的阀门 流阻小，启闭力小，开启时间长 按阀杆分：明杆闸阀(outside screw-and-yoke: OS&Y) 暗杆闸阀(non rising stem: NRS) 按闸板分：平板闸阀parallel gate（单平板single gate、双平板double-disc parallel gate） 楔式闸阀wedge gate（单闸板on...
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non-rising stem valve 不升杆式阀 ; 暗杆阀
Non-rising stem 非升杆式 ; 暗杆 ; 阀的暗杆
non-rising stem wedge sluice valve 暗杆楔式闸阀
non-rising stem wedge gate valve 暗杆楔式闸阀
Non Rising Stem Single 暗杆楔式单闸板闸阀
The extension includes handwheel, non-rising stem, fittings and extensions to allow remote operation normally from above.
加长件包括手轮，暗杆，连接件和加长件，允许在上方进行远程操作。
This arrangement combined with the feature of a non-rising stem assures a positive seal against either steam or water.
这种结构方式具有不上升阀杆的特点，保证了对蒸汽或水都能够达到很好的密封功能。
The Fig. 1710 Balancing valve is a non-rising stem design incorporating a parabolic (plug) shaped disc.
型号1710平衡阀为暗杆结构，配置抛物线（塞）形阀瓣。
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