闸阀和截止阀是两种常见的工业管道设备，它们在控制流体流动方面发挥着重要作用，但它们在结构、工作原理、性能特点以及使用场合上存在显著差异。以下是它们的主要区别：

　　Gate valves and globe valves are two common industrial pipeline equipment that play an important role in controlling fluid flow, but they have significant differences in structure, working principle, performance characteristics, and usage scenarios. Here are their main differences:

　　结构差异

　　Structural differences

　　截止阀 ：

　　Globe valve:

　　包括阀体、阀瓣、阀杆和手轮。

　　Including valve body, valve disc, valve stem, and handwheel.

　　阀瓣通过阀杆的上下移动来控制开启和关闭，实现流体通断。

　　The valve disc is controlled to open and close by the up and down movement of the valve stem, achieving fluid flow control.

　　闸阀 ：

　　Gate valve:

　　包括阀体、闸板、阀杆和手轮。

　　Including valve body, gate, valve stem, and handwheel.

　　闸板通过上下移动来实现阀门启闭，开启时闸板脱离流体通道，关闭时紧密贴合阀座。

　　The gate valve is opened and closed by moving up and down. When opened, the gate valve disengages from the fluid channel, and when closed, it tightly fits the valve seat.

　　工作原理

　　working principle

　　截止阀 ：

　　Globe valve:

　　通过阀瓣的线性运动控制流体流动，改变流向，具有一定节流能力。

　　By controlling fluid flow through linear motion of the valve disc, changing the direction of flow, it has a certain throttling ability.

　　密封面通常是阀瓣与阀座之间的锥面接触，密封性能较好。

　　The sealing surface is usually the conical contact between the valve disc and the valve seat, which has good sealing performance.

　　闸阀 ：

　　Gate valve:

　　通过闸板的上下移动实现流体通断，流体流向不变，不适用于调节流量。

　　By moving the gate up and down to achieve fluid flow, the fluid direction remains unchanged and is not suitable for regulating flow rate.

　　密封面是闸板与阀座之间的平面接触，密封性能相对较低。

　　The sealing surface is the flat contact between the gate and the valve seat, and its sealing performance is relatively low.

　　应用场景

　　Application scenarios

　　截止阀 ：

　　Globe valve:

　　适合需要精确控制流量的场合，如频繁启闭或调节流量的管道系统。

　　Suitable for occasions that require precise flow control, such as pipeline systems that frequently open or close or regulate flow.

　　适用于高压、高温及腐蚀性介质。

　　Suitable for high pressure, high temperature, and corrosive media.

　　闸阀 ：

　　Gate valve:

　　适合需要全开或全关的场合，如不经常操作的管道系统。

　　Suitable for occasions that require full opening or full closing, such as pipeline systems that are not frequently operated.

　　流阻小，适用于大口径、大流量的管道系统。

　　Low flow resistance, suitable for large-diameter and high flow pipeline systems.

　　优缺点

　　Advantages and disadvantages

　　截止阀 ：

　　Globe valve:

　　优点：密封性好、调节性能强。

　　Advantages: Good sealing and strong adjustment performance.

　　缺点：流阻大，开启和关闭力矩较大。

　　Disadvantages: High flow resistance, large opening and closing torque.

　　闸阀 ：

　　Gate valve:

　　优点：流阻小，开启和关闭力矩较小。

　　Advantages: Low flow resistance, small opening and closing torque.

　　缺点：密封性相对较差，不适用于调节流量。

　　Disadvantages: Relatively poor sealing performance, not suitable for regulating flow rate.

　　流向

　　flow to

　　截止阀 ：

　　Globe valve:

　　介质可以从阀芯的下方或上方进入。

　　The medium can enter from below or above the valve core.

　　闸阀 ：

　　Gate valve:

　　介质流向在阀门内部不变。

　　The flow direction of the medium remains unchanged inside the valve.

　　维护流程

　　Maintenance process

　　截止阀 ：

　　Globe valve:

　　大部分截止阀阀座和阀瓣可以在线更换，不需要拆除整个阀门。

　　Most globe valve seats and discs can be replaced online without the need to dismantle the entire valve.

　　闸阀 ：

　　Gate valve:

　　维修不适合在现场管道上进行，通常需要将整个阀门从管线上拆下。

　　Repairs are not suitable for on-site pipelines and usually require the entire valve to be removed from the pipeline.

　　选择闸阀还是截止阀应根据具体的应用需求、工作条件以及所需的流量控制能力来决定。希望这些信息能帮助你更好地理解它们之间的区别

　　The choice between gate valve and globe valve should be determined based on specific application requirements, working conditions, and the required flow control capability. I hope this information can help you better understand the differences between them

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