原文：
          截止阀是关闭件（阀瓣）沿阀座中心线移动的阀门。 截止阀在管路中主要作切断用。截止阀截止阀有以下优点： 1． 在开闭过程中密封面的摩擦力比闸阀小，耐磨。 2． 开启高度小。 3． 通常只有一个密封面，制造工艺好，便于维修。 截止阀使用较为普遍，但由于开闭力矩较大，结构长度较长，一般公称通径都限制在DN≤200mm以下。截止阀的流体阻力损失较大。止回阀因而限制了截止阀更广泛的使用。 截止阀的种类很多， 电磁阀根据阀杆上螺纹的位置可分：

 一、上螺纹阀杆截止阀 截止阀阀杆的螺纹在阀体的外面。水力控制阀其优点是阀杆不受介质侵蚀，便于润滑，此种结构采用比较普遍。如图 2—8所示。

 二、下螺纹阀杆截止阀 截止阀阀杆的螺纹在阀体内。安全阀这种结构阀杆螺纹与介质直接接触，易受侵蚀，并无法润滑。此种结构用于小口径和温度不高的地方。 根据截止阀的通道方向，又可分为；直通式截止阀，角式截止阀和三通式截止阀，后两种截止阀通常做改变介质流向和分配介质用。

“Valve characteristics and classification ”是由中国截止阀网提供的阀门新闻，译文仅供参考。另外，中国截止阀网还提供相关产品搜索： 直通(流)式截止阀 波纹管截止阀、 更多截止阀产品、 气动管路截止阀(仪表截止阀)、 更多截止阀产品、 截止阀价格。

译文：
         Cut-off valve is closed parts (disc) moving along the centerline of the valve seat. Valve in the pipe used mainly for cutting.Filter Valve has the following advantages: 1. In the process of opening and closing the sealing surface of the friction smaller than the gate valve, wear. 2. Opening height small. 3. Usually only one sealingBellow Seal Valves surface, manufacturing process, and easy maintenance. More commonly used cut-off valve, but a larger opening and closing moments, the structure length is longer, generally nominal diameter DN ≤ 200mm are limited to the following. Valve's fluid resistance losses. Thus limiting the broader use of cut-off valve. Many different types of valves, accordingNeedle Valves to the location of the valve stem thread can be divided into: First, the threaded valve stem Valve stem threads outside of the body.Forged Steel Valves The advantage is that stem from media erosion, ease of lubrication, more common use of such structures. As shown in Figure 2-8. Second, under the valve stem thread Valve stem in the valve body Automatic Control Valvesthreads. This structure stem threads direct contact with the media, vulnerability to erosion, and can not be lubricated. Such structure for small caliber and high temperature areas. Cut-off valve according to the channel direction, can be divided into; straight-through valve, angle-type valve and three-type globe valve, globe valve is usually done after the two kinds of flow and distribution of media to change the medium used.

原文来源：http://www.1jiezhifa.com/

2010-09-01 08:09

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