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减压阀按结构应该如何分类？

2020-12-10 00:00

减压阀有很多种，要注意什么场合用什么减压阀。我们会为大家整理三种蒸汽减压阀的分类，以及如何根据结构进行分类。

一、减压阀中的作用减压阀是一种与其他减压阀相比操作非常简单的阀，是一种带有平隔膜或波纹管的直接作用减压阀。因为是独立结构，不需要在下游安装外感线。

二、直动式减压阀由主阀、先导阀和截止阀组成。当调节弹簧处于自由状态时，主阀和先导阀处于关闭状态。拧上调节螺丝，用物质打开先导阀，进入主阀硫化橡塑膜室，使橡胶隔膜上升，主阀打开，物质流入进出口，进出口处的物质反馈到硫化橡塑膜上室和先导阀正下方的室。

活塞减压阀：这种减压阀集先导阀和主阀两种阀门于一体。先导阀的设计类似于直接作用减压阀。先导阀的排气压力作用在活塞上，导致活塞打开主阀。

如果主阀太大而不能直接打开，这种设计将使用入口压力来打开主阀。因此，在相同的管道尺寸下，昆山李新龙减压阀比直接作用减压阀具有更高的容量和精度。和直动式减压阀一样，减压阀内部的压力是感应压力的，所以不需要在外面安装感应线。

减压阀中的薄膜减压阀：在这种类型的蒸汽减压阀中，双隔膜代替了内导向减压阀中的活塞。这种增加的隔膜面积可以打开更大的主阀，并且在相同的管道尺寸下，其容量大于内部导向活塞减压阀的容量。此外，膜片对压力变化更加敏感。更高的精度是由于下游传感线的定位，那里有较少的气体或液体湍流。

 

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