一、定義上的區別

1、 Differences in Definition

閘閥：閘閥也叫閘板閥，是一種常見的啟閉閘，閘閥的閘板運動方向與流體方向是垂直的，閘閥只能作全開或者全關，不能作調節和節流，只能作截斷介質流通使用。當閘閥處于全開狀態時，閥體內流體阻力小于蝶閥。

Gate valve: Gate valve, also known as gate valve, is a common type of opening and closing gate. The direction of the gate plate movement of the gate valve is perpendicular to the direction of the fluid. The gate valve can only be fully open or fully closed, cannot be adjusted or throttled, and can only be used to cut off the flow of the medium. When the gate valve is in the fully open state, the fluid resistance inside the valve body is smaller than that of the butterfly valve.

蝶閥：蝶閥是一種簡單的調節閥，它的啟閉開關是一個圓形的碟板，在閥體內繞自身的軸線旋轉來實現閥門的開啟與關閉。蝶閥在管道上既可以起到截斷作用，又可以有節流作用。蝶閥全開到全關通常是小于90°，此時只有碟版的厚度是流體唯一的阻力，所以流阻力很小。

Butterfly valve: A butterfly valve is a simple regulating valve whose opening and closing switch is a circular disc that rotates around its own axis inside the valve body to achieve the opening and closing of the valve. Butterfly valves can serve both cut-off and throttling functions on pipelines. The butterfly valve is usually less than 90 ° when fully opened to fully closed, and at this time, only the thickness of the disc is the only resistance of the fluid, so the flow resistance is very small.

二、運動方式的區別

2、 Differences in exercise methods

閘閥：閘閥是一種直行程閥門，即閥桿帶動閥板上下垂直移動，完成閘閥的開啟和關閉，因此閘閥的流動阻力較小，但由于其開啟高度較高，開啟和關閉速度較慢。

Gate valve: Gate valve is a type of straight stroke valve, in which the valve stem drives the valve plate to move vertically up and down, completing the opening and closing of the gate valve. Therefore, the flow resistance of the gate valve is small, but due to its high opening height, the opening and closing speed is slower.

蝶閥：蝶閥屬于角行程閥，即蝶閥的閥板繞閥軸旋轉90，完成蝶閥的開啟和關閉動作，所以蝶閥開啟高度僅為通道直徑的四分之一，所以蝶閥開啟和關閉迅速快。

Butterfly valve: Butterfly valve belongs to angle stroke valve, that is, the valve plate of the butterfly valve rotates 90 degrees around the valve shaft to complete the opening and closing action of the butterfly valve. Therefore, the opening height of the butterfly valve is only one fourth of the channel diameter, so the butterfly valve opens and closes quickly and quickly.

從以上區別我們可以看出兩者主要的區別是調節功能，蝶閥可以可調節流量，閘閥不能;閘閥壓力可以做得很高而蝶閥不行;閘閥密封相對要比蝶閥要好。兩種管道各有各的特點，選擇的時候根據需求選擇就行。

From the above differences, we can see that the main difference between the two is the adjustment function. Butterfly valves can adjust flow, while gate valves cannot; Gate valves can have high pressure while butterfly valves cannot; The sealing of gate valves is relatively better than that of butterfly valves. The two types of pipelines each have their own characteristics, so when choosing, it is enough to choose according to the needs.