电磁阀在液路系统中用来实现液路的通断或液流方向的改变，它一般具有一个可以在线圈电磁力驱动下滑动的阀芯，阀芯在不同的位置时，电磁阀的通路也就不同。阀芯的工作位置有几个，该电磁阀就叫几位电磁阀：阀体上的接口，也就是电磁阀的通路数，有几个通路口，该电磁阀就叫几通电磁阀。

电磁阀安装须知： 

1、安装前仔细阅读产品说明书，检查产品是否符合使用要求，记住安装要点，做好准备工作。

2、校对铭牌所标参数与所选用产品的参数是否一致，电源电压应满足额定电压电压波动范围：交流+10%~-15%，直流+10%~-10%，平时线圈组件不宜拆开。

3、电磁阀接管之前用0.3MPa的压力对管道冲洗，把管道中的金属粉末及密封材料残留物，锈垢等清除。

4、注意介质的洁净度，如果介质内混有尘垢，杂质等妨碍电磁阀的正常工作，管道中应装过滤阀滤网≥60目。

5、电磁阀不宜装在管道低凹处，装在容器的排出管道中，注意不可自容器底部引出，而应装在容器底部稍上位置。

6、如果介质会起水锤现象，那么应该选用具防水锤功能的电磁阀或采取相应的防范措施。 

7、蒸汽用电磁阀入口侧应装有疏水阀，该处接管应倾斜。 

8、电磁阀一般是定向的，不可装反，通常在阀体上用“→”指出介质流动方向，安装时要依照“→”指示的方向安装但是本公司可能有时在真空管路或特殊情况下会有提议反装除外。

9、安装姿势：一般电磁阀的电磁线圈部件应竖直向上，竖直安装在水平于地面的管道，如果受空间限制或工况要求必须按侧立如楼房下水道似的管路或倒立安装的，请在选型订货时提出。有些产品有特别规定，请按说明书安装。 
电磁阀的线圈是指电感器。是指导线一根一根绕起来，导线彼此互相*缘，而*缘管可以是空心的，也可以包含铁芯或磁粉芯，简称电感。电感又可分为固定电感和可变电感，固定电感线圈是由导线一圈靠一圈地绕在*缘管上，导线彼此互相*缘，而*缘管可以是空心的，也可以包含铁芯或磁粉芯，简称电感或线圈。用L表示，单位有亨利(H)、毫亨利(mH)、微亨利(uH)，1H=10^3mH=10^6uH。

德国博世Bosch力士乐Rexroth电磁换向阀4WE 6通经 "H"机能型优势订货型号

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