产品参数

加工定制：否 品牌：REXROTH/力士乐 型号：DB6VPW2-1X/80V 标准：A 材料级别：A 材质：铸铁 产地：德国 阀体材料：铸铁 工作温度：高温 密封材料：塑胶 适用介质：油 用途：分流

溢流阀先导式DB 

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 先导式溢流阀的工作原理： 当压力油从入口流入时，压力作用在主阀芯下端平面上。阀体内部设计有阻尼孔，压力油通过后进入先导阀的右腔，并作用于先导溢流阀的阀芯上。先导溢流阀的阀芯受弹簧推力而处于常闭状态，通过外部的调节手柄，可对弹簧的预调压力做出调整。当液压压力小于弹簧预调压力时，先导阀芯始终处于封闭状态，此时主阀芯亦无相应动作。当液压系统压力上升，导致先导阀内部液压压力大于弹簧预调压力，先导阀开启，在阻尼孔的降压作用下，主阀芯上、下产生压力差，因此主阀芯上抬，原本密封的进油路以及出油路相通，压力油直接从进油口到出油口，实现卸荷。

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