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减压阀按结构应该如何分类？

2021-05-12 00:00

减压阀的话分为很多种，在什么场合使用什么减压阀也是有讲究的，为大家整理出三汽减压阀分类，按结构如何分类呢？

一、减压阀中的作用式减压阀，是一款相对于其他减压阀来算操作非常简单的一款阀门，直接作用式减压阀，带有平膜片或波纹管。因为它是独立结构，因此无需在下游安装外部传感线。它是三种减压阀中体积小、使用经济的一种，专为中低流量设计。

二、减压阀中的活塞式减压阀：该类型的减压阀集两种阀―导阀和主阀―于一体。导阀的设计与直接作用式减压阀类似。来自导阀的排气压力作用在活塞上，使活塞打开主阀。

如果主阀较大，无法直接打开时，这种设计就会利用入口压力打开主阀。因此，这种类型的昆山立信隆减压阀，与直接作用式减压阀相比，在相同的管道尺寸下，容量更高。与直接作用式减压阀相同的是，减压阀内部感知压力，无须外部安装传感线。

三、减压阀中的薄膜式减压阀：在这种类型的蒸汽减压阀中，双膜片代替了内导式减压阀中的活塞。这个膜片面积能够打开更大的主阀，并且在相同的管道尺寸下，其容量比内导式活塞减压阀更大。另外，膜片对压力变化更为敏感，准确度可达+/-1%。准确性更高是由于下游传感线的定位，其所在位置气体或液体动荡更少。

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