DA6VP2A5X/200FSM先导式压力截止阀 德国进口博世力士乐REXROTH压力阀 压力截止阀

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DA6VP2A5X/200FSM先导式压力截止阀

先导式压力截止阀

DA 6 V

规格 6

组件系列 5X

较大工作压力 350 bar

较大流量 40 l/min

DA 6 V 型压力阀是一种可无级调节切换压差的先导式压力截止阀。此类阀主要由拧入式插装阀的先导控制级和主级 (1)、单向阀 (2) 和壳体 (3) 组成。

通过油口 B 将 P 中的泵流量引入系统的蓄能器中。如果油口 B 中执行机构的压力超过设定顶部切换压力，则先导控制阀将打开并将通过油口 A (Y) 启动先导油排放。单向阀 (2) 将关闭油口 B 至 P 的连接，且泵流量将切换到卸压油路（从 P 到T）。

型号 DA 6 VP

将泵流量从 P 至 B（泵 → 执行机构）切换为 P 至 T（泵 → 油箱）。

泵通过单向阀 (2) 向液压系统（P 至 B）供油。通道 B 中的压力通过控制油路 (4) 和孔 (5) 作用于拧入式插装阀 (1) 的先导控制。同时，通道 P 中的压力通过孔 (7) 施加于主控制阀芯 (8) 的弹簧负载侧。当在拧入式插装阀 (1) 中通过调节主轴 (6) 设置的顶部截止压力到达液压系统（通道 B）时，拧入式插装阀 (1) 的先导控制将打开从主阀芯 (8) 的弹簧负载侧到控制油路 (9) 的连接和通过油口 A (Y) 进入油箱的外部连接。由于存在孔 (7)，在主阀芯 (8) 处产生了压降。主阀芯 (8) 将升离阀座，打开 P 至 T 的连接。单向阀 (2) 关闭 B 至 P 的连接，而拧入式插装阀 (1) 的先导控制在 B 中执行机构压力的作用下保持在打开位置。

切断阀是自动化系统中执行机构的一种，由多弹簧气动薄膜执行机构或浮动式活塞执行机构与调节阀组成，接收调节仪表的信号，控制工艺管道内流体的切断、接通或切换。具有结构简单，反应灵敏，动作可靠等特点。 可广泛地应用在石油、化工、冶金等工业生产部门。气动切断阀的气源要求经过滤的压缩空气，流经阀体内的介质应该是无杂质和无颗粒的液体和气体。根据允许压差情况、介质特点以及工艺管道要求，可选用单座、套筒、三通切断阀。

切断阀可装在容器接头或立管上。当阀连接在立管上时，接头尺寸至少为3/4英寸。当容器接头是法兰式管嘴并且切断阀直接安装在管嘴上时，接头较小尺寸为1英寸。当容器接头是管接头且切断阀安装在一个短节上时，接头的较小尺寸为3/4英寸，（除下述提到的例外情况外）。容器和切断阀之间的配件或管道要减至较低限度。

DA6VP2A5X/200FSM先导式压力截止阀型号

力士乐REXROTH先导式压力切断阀DA 6 V

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力士乐REXROTH先导式压力切断阀DA

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R901007242 DAC30-2-5X/50-10

R900763492 DAC30-2-5X/50-10Y

R900247867 DAC30-3-5X/100-17

R900557717 DAC30-3-5X/200-17V

R900958955 DAC30-3-5X/315-17

R900515856 DAC30-3-5X/50-17YV

R978868397 DAC-2-5X/100-17/12

R987156169 DAC-2-5X/315-17SO26-567

R987109281 DAC-2-5X/50-17/12

R901264745 DAC1-5X/100-10

R900597813 DAC1-5X/100-17Y

阀门的密封性能是指阀门各密封部位阻止介质泄漏的能力，它是阀门重要的技术性能指标。阀门的密封部位有三处：启闭件与阀座两密封面间的接触处；填料与阀杆和填料函的配合处；阀体与阀盖的连接处。其中前一处的泄漏叫做内漏，也就是通常所说的关不严，它将影响阀门截断介质的能力。对于截断阀类来说，内漏是不允许的。后两处的泄漏叫做外漏，即介质从阀内泄漏到阀外。外漏会造成物料损失，污染环境，严重时还会造成事故。