力士乐比例阀3DREE10P-7X/100YG24K31A1V*销售

经营产品：

阀类：电磁阀、换向阀、单向阀、溢流阀、减压阀、平衡

阀、插装阀、比例阀等

泵类：齿轮泵、柱塞泵、叶片泵等

承诺：保证原装*，假一赔十 量大价格好商量！！

武穴黎翔机电设备有限公司REXROTH力士乐销售部

询价：陈

广泛应用于钢铁、冶金、铝行业、石油化工、航天、船舶制造、煤炭、水泥、电力、汽车、工程机械、食品、药业、林业、纺织、皮革、造纸等行业领域

比例阀采用阀芯+阀体结构。伺服阀和伺服比例阀主要应用在闭环控制系统，比例阀的驱动装置是比例电磁铁。

伺服阀的驱动装置是力马达或力矩马达.阀体兼作阀套。

驱动装置不同.所以近些年出现了比例伺服阀。

比例阀一般zui高几十Hz，伺服阀中位没有死区，伺服阀对液压油液的要求更高.性能参数不同；否则容易堵塞，

用来控制流量和流向，比例阀要求低一些.比例阀有中位死区；

比例阀和伺服阀的区别主要体现在以下几点：

逐渐向伺服阀靠近，

比例换向阀属于比例阀的一种，滞环、中位死区、频宽、过滤精度等特性不同.阀的额定压降不同；比例换向阀具有与普通换向阀相似的中位机能，

而比例伺服阀性能介于伺服阀和比例阀之间，因此应用场合不同，伺服阀和伺服比例阀采用阀芯+阀套的结构。中位机能种类不同.其它结构的比例阀主要应用在开环控系统及闭环速度控制系统；因为比例阀的性能越来越好；2伺服阀的频响（响应频率）更高。阀芯结构及加工精度不同.伺服阀与比例阀之间的差别并没有严格的规定。

，可以高达200Hz左右，需要精过滤才行，而伺服阀中位机能只有O型（Rexroth产品的E型）。

博世力士乐rexroth管式单向阀 博世力士乐rexroth管式单向阀

力士乐rexroth管式液压阀 力士乐rexroth管式单向阀 力士乐流量阀

单向阀是流体只能沿进口流动，出口介质却无法回流的装置。

单向阀又称止回阀或逆止阀。用于液压系统中防止油流反向流动,或者用于气动系统中防止压缩空气逆向流动。

单向阀有直通式和直角式两种。直通式单向阀用螺纹连接安装在管路上。直角式单向阀有螺纹连接、板式连接和法兰连接三种形式。液控单向阀也称闭锁阀或保压阀，它与单向阀相同，用以防止油液反向流动。但在液压回路中需要油流反向流动时又可利用控制油压，打开单向阀，使油流在两个方向都可流动。液控单向阀采用锥形阀芯，因此密封性能好。在要求封闭油路时，可用此阀作为油路的单向锁紧而起保压作用。液控单向阀控制油的泄漏方式有内泄式和外泄式二种。在油流反向出口无背压的油路中可用内泄式；否则需用外泄式，以降低控制油压力。

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