译文：
闸阀按阀杆的构造可分为: 1明杆闸阀：阀杆螺母在阀盖或支架上，开闭闸板时，用旋转阀杆螺母来实现阀杆的升降。这种结构对阀杆的润滑有利，开闭程度明显，因此被广泛采用。 2暗杆闸阀：阀杆螺母在阀体内，与介质直接接触。开闭闸板时，用旋转阀杆来实现。这种结构的优点是：闸阀的高度总保持不变，因此安装空间小，适用于大口径或对安装空间受限制的闸阀。此种结构要装有开闭指示器，以指示开闭程度。这种结构的缺点是：阀杆螺纹不仅无法润滑，而且直接接受介质侵蚀，容易损坏。 主要区别： 1.暗杆法兰闸阀的提升螺杆是只旋转而无上和下移动，外露的只是一根杆，其螺母是固定在闸板上，通过螺杆的旋转来提升闸板，没有可见的门架；明杆法兰闸阀的提升螺杆是外露的，螺母紧贴手轮且是固定的（不旋转也不轴向移动），通过旋转螺杆来提升闸板，螺杆与闸板只有相对的旋转运动而无相对的轴向位移，外观为有门形支架。 2暗杆阀门就是看不见丝杠，而明杆的就是能看见丝杆的。 3.暗杆阀门在开关时方向盘与阀杆是连接在一起相对不动的，它是通过阀杆在固定点转动来带动阀瓣向上提升和下闸来完成启闭的。明杆阀门则是通过阀杆与方向盘的螺纹传动来提升或者降下阀瓣。 说简单点就是明杆阀门是阀瓣连着阀杆一起做上下运动，方向盘始终在固定点。
“ Rising stem gate valves and rising stem gate valve of the difference ”是由提供的国际阀门新闻，译文仅供参考。另外，中国闸阀网还提供相关产品搜索：、、、、等。
原文：
Valve stem of the structure can be divided by: A clear shot valve: the valve stem nut cover, or bracket, the closing gate, the rotary valve stem nuts to achieve the valve stem down. This structure of the valve stem lubrication favorable, the closing level of obvious, so widely used. 2 dark rod valve: the valve stem nut body, direct contact with the media. Open and close gate when the rotary valve stem to achieve. This structure has the advantage of: the height of the total remains the same gate, so installation space, suitable for large diameter or restricted valve installation space. Such structure should be equipped with open and close indicator to indicate the degree of opening and closing. Disadvantage of this structure is: not only cannot stem thread lubrication, but also directly accept the medium erosion, easy to damage. Main differences: 1. Rising stem gate valve flange to enhance screw rotation only up and down without moving, only one pole exposed, the nut is fixed to the gate, through which the screw rotates to raise gate, no visible door frame; next upgrade valve rod flange is exposed screw, nut and hand wheel is fixed close to the (non-axial rotation does not move), to enhance the gate by turning the screw, screw and gate board only relative rotation without relative axial displacement, the appearance of a door-shaped scaffold for the. 2 screw rising stem valve is visible, while the next is to see the screw rod's. 3. Rising stem valve when the steering wheel in the switch is connected with the valve stem is relatively fixed, it is a fixed point in the rotation through the valve stem to drive up to upgrade and the next disc to complete the opening and closing the gate. Rising stem valve is threaded through the stem and the steering wheel to raise or lower drive disc. Simple point is that tomorrow is a disc attached rod valve stem up and down movement with the steering wheel has a fixed point.
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