插装阀与我们所说的普通液压控制阀有所不同，它的通流量可达到1000L/min,通径可达200～250mm。阀芯结构简单，动作灵敏，密封性好。它的功能比较单一，主要实现液路的通或断，与普通液压控制阀组合使用时，才能实现对系统油液方向、压力和流量的控制。
插装阀基本组件
组件由阀芯、阀套、弹簧和密封圈组成。根据用途不同分为方向阀组件、压力阀组件和流量阀组件。同一通径的三种组件安装尺寸相同，但阀芯的结构形式和阀套座直径不同。三种组件均有两个主油口A 和B、一个控制口x 。
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