上海韦米机电设备有限公司

比例控制阀4WRTE27W8-500L-4X/6EG24K31/F1V 德国博世力士乐REXROTH比例阀 比例控制阀 原装供应

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比例控制阀4WRTE27W8-500L-4X/6EG24K31/F1V

阀对流量的控制可以分为两种：

一种是开关控制：要么全开、要么全关，流量要么大、要么小，没有中间状态，如普通的电磁直通阀、电磁换向阀、电液换向阀。

另一种是连续控制：阀口可以根据需要打开任意一个开度，由此控制通过流量的大小，这类阀有手动控制的，如节流阀，也有电控的，如比例阀、伺服阀。

所以使用比例阀或伺服阀的目的就是：以电控方式实现对流量的节流控制（当然经过结构上的改动也可实现压力控制等），既然是节流控制，就必然有能量损失，伺服阀和其它阀不同的是，它的能量损失更大一些，因为它需要一定的流量来维持前置级控制油路的工作。

比例阀也分为压力阀、流量阀和方向阀几大类。近来又出现了功能复合化的趋势。

比例阀用于模拟控制，是介于普通开关控制与伺服控制之间的控制方式，它也特别适合于

设备的革新或改造。使设备自动化控制水平大为提高。其在现代液雌系统中占比例很大口

与普通液压阀相比.比例阀的优点是:①能简单地实现远距离控制:②能连续地、按比例地控制液压系统的压力和流量。从而实现对执行机构的位置、速度和力的连续控制，并能防止或减小压力、速度变换时的冲击;③油路简化，元件数量少。

比例阀适用于既要求能连续控制胀力、流量.和方向.而又不需要很I的控制精度的场合。

比例控制阀4WRTE27W8-500L-4X/6EG24K31/F1V

4WRTE型阀门是带电位置反馈，集成电子元件（OBE）和可选阀芯位置监控的先导式方向控制阀。

设置

该阀主要由3个主要组件组成：

带有主级控制阀芯（2）和可选阀芯位置监控（13）的壳体（1）

集成电子设备（可选带电子保护膜（14））和主级感应位置传感器（3）

先导控制阀（4），带控制阀芯/阀座单元（5），感应式位置传感器（6）和压力反馈，用于主级控制阀芯（2）的中心位置

功能

在比例电磁阀（7; 8）失电的情况下，由于定心弹簧（9）和压力反馈，主级控制阀芯（2）的中心位置

通过先导控制阀（4）控制主级控制阀芯（2）→主级控制阀芯（2）以可调节的方式定位

通过改变比例电磁阀（7; 8）的电磁力来控制先导控制阀（4）的控制阀芯

集成电子设备中命令和实际值的连接

先导油从内部通过油口P或从外部通过X口供应给先导控制阀先导油从内部通过油口T或从外部通过Y返回到油箱

电子设备以0 V的指令值将中央控制阀芯（2）控制在中央位置

阀芯位置监控

主级控制阀芯（2）的阀芯位置由感应式位置开关（13）检测，并通过两个带有预设逻辑的开关输出显示。如果超出了固定设置的开关点，则会在控制阀芯重叠内监控从零位置的偏离（请参见“附件”）。

开关信号可用于监控功能的高等控制中。电气连接通过一个4极连接器M12x1单独实现，该连接器具有两个用于信号输出的引脚和两个用于电压供应的引脚。

应用领域

该阀可用于与安全相关的两通道应用（根据EN 13849-1的类别3，PL d和类别4，PL e），作为一个通道的关闭元件。该阀门符合EN 60204规定的安全启动舒缓器的要求，停止类别为0。

如果需要安全要求，则必须根据以下要求安全地断开阀门的电源电压：

要求的安全等级（PL类）。

根据EN 13849-1的应用和特定于工作设备的标准的要求，用户必须提供符合要求的适当监控/合理性检查

诊断覆盖率DCavg使用上级控件。

比例控制阀4WRTE27W8-500L-4X/6EG24K31/F1V

力士乐REXROTH三位四通高响应换向阀、先导式、电气位置反馈和集成电子放大版（OBE）4WRTE

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R901313717 4WRTE16E200R-4X/6EG24TK31/A5M=LB

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R901322335 4WRTE25W8-350L-4X/6EG24ETK31/A5M=LB

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R901116120 4WRTE35V1000P-4X/6EG24K31/A1M-280

R901294422 4WRTE35V1000P-4X=6EG24TK31/A1V-956

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R901146839 4WRTE35W9-1000L-4X/6EG24K31/A1M

力士乐REXROTH高响应方向阀，先导，带集成电控装置（OBE）和电气位置反馈4WRDE -5X

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R900936057 4WRDE16E200P-5X/6L24K9/MR-636

R900522817 4WRDE16E200P-5X/6L24TZ9/MR-280

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R900574991 4WRDE16E200P-5X/6L24Z9/MR

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R900518970 4WRDE16Q2-125P-5X/6L24Z9/WG043VR

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R900574707 4WRDE16V000S-5X/6L24Z9/WG021M-489

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R900510540 4WRDE16V125L-5X/6L24ETZ9/MR

R900577641 4WRDE16V125L-5X/6L24Z9/MR-280

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压力开关是通过高精度仪表放大器放大压力信号，通过高速MCU采集并处理数据，内置准确传感器进行补偿，是检测压力、液位信号，实现压力、液位监测和控制的高精度设备。广泛使用在化工、机械、水文、电力、环保等测量气体、液体压力的自动化系统中。因为调节方便灵活，安装简单，可以替代大部分使用液位开关的场合。