一、定义上的区别

1、 Differences in Definition

闸阀：闸阀也叫闸板阀，是一种常见的启闭闸，闸阀的闸板运动方向与流体方向是垂直的，闸阀只能作全开或者全关，不能作调节和节流，只能作截断介质流通使用。当闸阀处于全开状态时，阀体内流体阻力小于蝶阀。

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.

蝶阀：蝶阀是一种简单的调节阀，它的启闭开关是一个圆形的碟板，在阀体内绕自身的轴线旋转来实现阀门的开启与关闭。蝶阀在管道上既可以起到截断作用，又可以有节流作用。蝶阀全开到全关通常是小于90°，此时只有碟版的厚度是流体唯一的阻力，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、运动方式的区别

2、 Differences in exercise methods

闸阀：闸阀是一种直行程阀门，即阀杆带动阀板上下垂直移动，完成闸阀的开启和关闭，因此闸阀的流动阻力较小，但由于其开启高度较高，开启和关闭速度较慢。

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.

蝶阀：蝶阀属于角行程阀，即蝶阀的阀板绕阀轴旋转90，完成蝶阀的开启和关闭动作，所以蝶阀开启高度仅为通道直径的四分之一，所以蝶阀开启和关闭迅速快。

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.

从以上区别我们可以看出两者主要的区别是调节功能，蝶阀可以可调节流量，闸阀不能;闸阀压力可以做得很高而蝶阀不行;闸阀密封相对要比蝶阀要好。两种管道各有各的特点，选择的时候根据需求选择就行。

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.