截止阀是工业管道中另一类重要的截断阀，其启闭件为阀瓣（阀芯），阀瓣沿阀座中心线作直线运动，通过改变阀瓣与阀座之间的距离来控制流道的通断。与闸阀的“闸门式”启闭不同，截止阀更像一个上下移动的“塞子”——阀瓣下降压紧阀座时，管道被切断；阀瓣上升离开阀座时，管道被接通。

Globe valve is another important type of shut-off valve in industrial pipelines, with its opening and closing component being the valve disc (valve core). The valve disc moves in a straight line along the centerline of the valve seat, and controls the flow path by changing the distance between the valve disc and the valve seat. Unlike the "gate style" opening and closing of gate valves, globe valves are more like "plugs" that move up and down - when the valve disc is lowered and the valve seat is tightened, the pipeline is cut off; When the valve disc rises and leaves the valve seat, the pipeline is connected.

截止阀属于强制密封式阀门。在阀门关闭时，建议依靠外力（手轮扭矩或执行机构推力）向阀瓣施加足够的压力，强制密封面紧密贴合，才能保证不泄漏。这一特性决定了截止阀在关闭状态下具有非常可靠的密封性能。截止阀的另一个显著特点是阀座通口的变化与阀瓣行程成正比关系——阀瓣提升得越高，流通面积就越大。因此，截止阀不仅可以用于截断介质，在对调节精度要求不高的场合也可用于流量调节。

Globe valves belong to forced sealing valves. When the valve is closed, sufficient pressure must be applied to the valve disc by external force (handwheel torque or actuator thrust) to force the sealing surface to fit tightly and ensure no leakage. This characteristic determines that the shut-off valve has very reliable sealing performance in the closed state. Another significant feature of globe valves is that the change in valve seat opening is directly proportional to the stroke of the valve disc - the higher the valve disc is raised, the larger the flow area. Therefore, globe valves can not only be used to cut off media, but also for flow regulation in situations where precision is not required.

截止阀在结构上有一个重要的方向性要求。我国阀门标准规定，截止阀的介质流向一律采用“低进高出”——介质从阀瓣下方进入，从上方流出。这种流向设计有两个好处：一是关闭时介质压力有助于阀瓣压紧阀座，增强密封效果；二是开启时操作力较小。安装时若方向装反，不仅会增加操作力矩，还可能导致阀门无法严密关闭。因此，截止阀的阀体上通常铸有流向箭头标识。

Globe valves have an important directional requirement in their structure. According to the valve standards in our country, the flow direction of the medium for globe valves is uniformly "low in, high out" - the medium enters from below the valve disc and flows out from above. This flow design has two benefits: first, when closed, the medium pressure helps the valve disc to press the valve seat tightly, enhancing the sealing effect; The second reason is that the operating force is relatively small when opening. If the direction is reversed during installation, it will not only increase the operating torque, but may also cause the valve to fail to close tightly. Therefore, the valve body of the globe valve is usually cast with flow arrow markings.

在结构形式上，常见的截止阀有直通式、角式和直流式三种。直通式截止阀的进出口在同一轴线上，流道呈“S”形，流阻较大但结构紧凑；角式截止阀的进出口成90°角，适用于管道转弯处；直流式截止阀的流道接近直线，流阻较小。截止阀的阀杆直径通常设计得较大，这是因为关闭时需要克服介质压力产生的推力，阀杆过细容易发生顶弯故障。

In terms of structural form, there are three common types of globe valves: straight through, angle, and DC. The inlet and outlet of the straight through globe valve are on the same axis, and the flow channel is in an "S" shape, with high flow resistance but compact structure; The inlet and outlet of the angle type globe valve form a 90 ° angle and are suitable for pipeline bends; The flow channel of the DC globe valve is close to a straight line with low flow resistance. The diameter of the valve stem of a globe valve is usually designed to be larger because it needs to overcome the thrust generated by the medium pressure when closing, and a thin valve stem is prone to top bending failure.

良工阀门生产的截止阀产品线十分丰富。J41H、J41Y、J41W系列国标截止阀采用圆柱形阀瓣，密封面呈平面或锥面。J61Y型电站截止阀具有高温高压的特点，采用独特的自密封设计——压力越高，密封越可靠。良工截止阀的阀杆经调质及表面氮化处理，具有良好的抗腐蚀性、抗擦伤性和耐磨性。产品覆盖手动、电动、气动等多种驱动方式，可满足不同工况的使用需求。

Lianggong Valve has a very rich product line of globe valves. The J41H, J41Y, and J41W series national standard globe valves use cylindrical valve discs with a flat or conical sealing surface. The J61Y type power station globe valve has the characteristics of high temperature and high pressure, and adopts a unique self sealing design - the higher the pressure, the more reliable the seal. The valve stem of Lianggong globe valve has undergone quenching and surface nitriding treatment, and has good corrosion resistance, abrasion resistance, and wear resistance. The product covers various driving modes such as manual, electric, and pneumatic, which can meet the needs of different working conditions.

截止阀的主要优点是结构简单、制造和维修方便、密封可靠。缺点是流体阻力较大——由于流道在阀体内多次改变方向，截止阀的流阻系数远高于闸阀。此外，截止阀的体形和重量也相对较大。因此，截止阀更适用于对密封性要求高、但对流阻不敏感的小口径管道系统，一般口径在DN200以下使用较为普遍。

The main advantages of globe valves are simple structure, easy manufacturing and maintenance, and reliable sealing. The disadvantage is that the fluid resistance is relatively high - due to multiple changes in the direction of the flow channel inside the valve body, the flow resistance coefficient of the globe valve is much higher than that of the gate valve. In addition, the shape and weight of the globe valve are relatively large. Therefore, globe valves are more suitable for small-diameter pipeline systems that require high sealing but are not sensitive to flow resistance, and are generally used for diameters below DN200.

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