力士乐比例阀R900954076 4WRAE6W07-2X/G24K31/A1V

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我司主要经销气动，液压，工控自动化流体控制设备备品备件

主营品牌：博世力士乐BOSCH-REXROTH、安沃驰AVENTICS、迪普马DUPLOMATIC、爱尔泰克AIRTEC、本特利Bently、贝加莱B&R、世格ASCO、阿托斯ATOS。

主要涵盖产品：电磁阀、比例阀、单向阀、溢流阀、压力继电器、压力传感器、叶片泵、柱塞泵、齿轮泵、蓄能器、气动阀、气缸、气源处理单元、探头、前置器、延伸电缆、监测模块、校验仪、伺服驱动器、PLC模块、I/O模块、伺服电机、触摸屏等。

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，流量要么较好、要么最小，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。

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力士乐REXROTH比例方向阀，直控式4WRA ...XE

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力士乐REXROTH二位四通和三位四通比例方向阀直控式，阀芯带位移电反馈，不带集成式放大版（OBE）4WRE

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