三通抗生素截止阀是关闭件（阀瓣）沿阀座中心线移动的阀门。
在管路中主要作切断用。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。

三通抗生素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。因而限制了截止阀更广泛的使用。

截止阀的种类很多，根据阀杆上螺纹的位置可分：

截止阀阀杆的螺纹在阀体的外面。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。

截止阀阀杆的螺纹在阀体内。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。

The three-way antibiotic stop valve is a valve in which the closing part (disc) moves along the center line of the valve seat.

The three-way antibiotic stop valve is mainly used for cutting off in the pipeline. The globe valve has the following advantages:

   1. In the process of opening and closing, the friction of the sealing surface is smaller than that of the gate valve, and it is wear-resistant.

   2. The opening height is small.

   3. Usually there is only one sealing surface, the manufacturing process is good, and the maintenance is easy.

The three-way antibiotic stop valve is commonly used, but due to the large opening and closing torque and the long structure length, the general nominal diameter is limited to DN≤200mm.

The fluid resistance loss of the shut-off valve is relatively large. This limits the wider use of the shut-off valve.

   There are many types of shut-off valves, which can be divided according to the position of the thread on the stem:

   1. Three-way antibiotic stop valve The thread of the stop valve stem is on the outside of the valve body. The advantage is that the valve stem is not corroded by the medium and is convenient for lubrication. This kind of structure is more common.

   2. Three-way antibiotic stop valve The thread of the valve stem of the stop valve is in the valve body. The stem thread of this structure is in direct contact with the medium, which is susceptible to corrosion and cannot be lubricated. This structure is used in places with small diameters and low temperatures.

   According to the channel direction of the stop valve, it can be divided into: straight-through stop valve, angle stop valve and three-way stop valve. The latter two stop valves are usually used to change the flow direction of the medium and distribute the medium.

产品图片：三通抗生素截止阀，不锈钢三通 截 止阀

安徽利勒洁净设备科技有限公司是国内专业生产制造洁净卫生级阀门管件，主要应用于食品机械行业、制药机械行业、乳制品行业、酿酒饮料行业以及精细化工等行业高精度卫生级流体设备的专业生产厂家，产品规格齐全；产品主要有：三通抗生素截止阀，不锈钢三通 截 止阀

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