EXROTH电磁球阀的工作原理是靠旋转阀恋来使阀门畅通或闭塞。电动球阀开关轻便，体积小，可以做成很大口径，密封可靠，结构 简单，维修方便，密封面与球面常在闭合状态，不易被介质冲蚀，在各行业得到广泛的应用。
电磁球阀和旋塞阀是同属一个类型的阀门，只有它的关闭件是个球体，球体绕阀体中心线作旋转来达到开启、关闭的一种阀门。
电磁球阀在管路中主要用来做切断、分配和改变介质的流动方向。球阀是近年来被广泛采用的一种新型阀门，它具有以下优点：
1． 流体阻力小，其阻力系数与同长度的管段相等。
2． 结构简单、体积小、重量轻。
3． 紧密可靠，目前球阀的密封面材料广泛使用塑料、密封性好，在真空系统中也已广泛使用。
4． 操作方便，开闭迅速，从全开到全关只要旋转90°，便于远距离的控制。
5． 维修方便，球阀结构简单，密封圈一般都是活动的，拆卸更换都比较方便。
6． 在全开或全闭时，球体和阀座的密封面与介质隔离，介质通过时，不会引起阀门密封面的侵蚀。
7． 适用范围广，通径从小到几毫米，大到几米，从高真空至高压力都可应用。
REXROTH电磁球阀的结构特点：
1.启闭无摩擦。这一功能完全解决了传统阀门因密封面之间相互摩擦而影响密封的问题。
2.上装式结构。对装在管道上的阀门可直接在线检查与维修，能有效减少装置停车，降低成本。
3.单阀座设计。消除了阀门中腔介质因异常升压而影响使用安全的问题。
4.低扭矩设计。特殊结构设计的阀杆，只需配一个小手把阀门就能轻松启闭。
5.楔形密封结构。阀门是靠阀杆提供的机械力，将球楔压在阀座上而密封，使阀门的密封性不受管线压差变化的影响，在各种工况下密封性能都有可靠保证。
6.密封面的自清洁结构。当球体倾离阀座时，管线中的流体沿球体密封，面成360°均匀通过，不仅消除了高速流体对阀座局部的冲刷，也冲走了密封面上的聚积物，达到自清洁的目的。
德国Rexroth力士乐电磁球阀型号如下：
R900207790 M-3SEW6U3X/420MG24N4K4
R900052621 M-3SED6UK1X/350CG24N9K4
R900052392 M-3SED6CK1X/350CG24N9K4
R900086685 M-3SED10CK1X/350CG24N9K4
R900051053 M-3SED10UK1X/350CG24N9K4
R900207790 M-3SEW6U3X/420MG24N4K4
R900052621 M-3SED6UK1X/350CG24N9K4
R900052392 M-3SED6CK1X/350CG24N9K4
R900051053 M-3SED10UK1X/350CG24N9K4
R900053910 M-3SED10CK1X/350CG96N9K4
R900207790 M-3SEW6U3X/420MG24N4K4
R900207722 M-3SEW10C1X/420MG96N9K4/B10
R900207615 M-3SEW6U3X/630MG26N9K4
R900207336 M-3SEW10C1X/420MG220N9K4/P
R900207279 M-3SEW6C3X/630MG24K4
R900206983 M-3SEW6U3X/420MG24K4QMAG24
R900206981 M-3SEW10C1X/420MG125N9K4/B10
R900206948 M-3SEW6C3X/630MG96N9K4/V
R900206773 M-3SEW6C3X/420MG96N9K4/V
R900206563 M-3SEW6U3X/420MG220N9K4
R900569890 M-3SEW6C3X/420MG24K4
R900569794 M-3SEW6U3X/420MG24K4
R900990705 M-3SEW6C3X/630MG125N9K4
R901026572 M-3SED6UK1X/350CG24N9K33L
R901020852 M-3SED10CK1X/350CG24N9XNZ4/V
R901020829 M-3SED6CK1X/350CG24N9XNZ4/B15V
R901020827 M-3SED6CK1X/350CG24N9XNZ4/V
R901018633 M-3SED6CK1X/350CG24N9K4K
R901015911 M-3SED6CK1X/350CG24N9Z2SO321
R901011799 M-3SED6CK1X/350CG24N9XEZ2
R901011038 M-3SED10UK1X/350CG24K33L
R901009514 M-3SED6UK1X/350CG24N9XEZ2
R900224618 M-3SED6UK1X/350CG24N9K4SO290
R900224616 M-3SED6UK1X/350CG24N9K4QMBG24
R900224614 M-3SED6UK1X/350CG24N9K4QMAG24
R900224613 M-3SED6UK1X/350CG24N9K4/PV
R900224611 M-3SED6UK1X/350CG24N9K4/B22
R900224609 M-3SED6UK1X/350CG24N9K4/B20
R900224607 M-3SED6UK1X/350CG24N9K4/B18
R900224606 M-3SED6UK1X/350CG24N9K4/B15
R900224605 M-3SED6UK1X/350CG24N9K4/B12V
R900224603 M-3SED6UK1X/350CG24N9K4/B10
R900224601 M-3SED6UK1X/350CG24N9K4/B07
R900224600 M-3SED6UK1X/350CG24N9K4/B00
R900224598 M-3SED6UK1X/350CG24K4QMAG24
R900224597 M-3SED6UK1X/350CG24K4/B15
R900224595 M-3SED6UK1X/350CG24K4/B12
R900224593 M-3SED6UK1X/350CG220N9K4/B12
R900224592 M-3SED6UK1X/350CG220N9K4
R900224589 M-3SED6UK1X/350CG205N9K4/PV
R900224588 M-3SED6UK1X/350CG205N9K4/V
R900224587 M-3SED6UK1X/350CG205N9K4/B12V
R900224586 M-3SED6UK1X/350CG205N9K4/B12
R900224585 M-3SED6UK1X/350CG205N9K4/B08
R900224582 M-3SED6UK1X/350CG205K4
R900224576 M-3SED6UK1X/350CG125N9K4
R900224567 M-3SED6UK1X/350CG110N9K4/B12
R900224566 M-3SED6UK1X/350CG110N9K4
R900224551 M-3SED6CK1X/350CG96N9K4/V
R901005188 M-3SED6UK1X/350CG125N9K4QMBG24/V
R901002375 M-3SED10CK1X/350CG24N9K4/PSO290
R900994831 M-3SED6UK1X/350CG24K4/V
R900993910
M-3SED6CK1X/350CG110N9EXZ2A/B15VSO827
R900992642 M-3SED6UK1X/350CG24K4QMBG24
R900992530 M-3SED10CK1X/350CG24N9K4/B30
R900991979 M-3SED10CK1X/350CG240N9K4
R900991800 M-3SED6CK1X/350CG24N9K4SO99
R901132414 M-3SED6CK1X/350CG24N9K4QMAG24/PV
R901130960 M-3SED6CK1X/350CG24N9XEZ2SO321
R901128993 M-3SED6UK1X/350CG24K4/B22V
R901128992 M-3SED6CK1X/350CG24K4/B22V
R901057718 M-3SED6UK1X/350CG96N9K4/B20V
R900618583 M-3SED10UK1X/350CG96K4
R900618582 M-3SED10CK1X/350CG24K4QMAG24
R901126385
M-3SED6UK1X/350CG24N9K4QMAG24/B12
R901121179 M-3SED6UK1X/350CG24N9XEZ2S0321
R901119288 M-3SED10CK1X/350CG24N9XNZ4
R901109401 M-3SED6UK1X/350CG24N9K4QMBG24/P
R901105673 M-3SED6UK1X/350CG110K4
R901103266 M-3SED6UK1X/350CG24N9XNZ4
R901098264 M-3SED6CK1X/350CG96K4QMAG24
R901097928 M-3SED10UK1X/350CG24N9K4/B25
R901096901 M-3SED6CK1X/350CG24N9K33L/P=AN
R901095848 M-3SED6CK1X/350CG24N9XNZ4
R901088606 M-3SED6UK1X/350CG24K4/B08
R901083219 M-3SED6CK1X/350CW110RN9XEZ2
R901082346 M-3SED6UK1X/350CW230RN9XEZ2
R901080736 M-3SED10CK1X/350CG240N9K4/V
R901080062 M-3SED6UK1X/350CG205N9K4/B20
R901079034
M-3SED6CK1X/350CG24N9K4QMBG24/B12
R901072879 M-3SED6UK1X/350CW110RN9XEZ2
R901072773 M-3SED6CK1X/350CG48N9XEZ2
R901072262 M-3SED10CK1X/350CG110N9K4/PSO290
R901068391 M-3SED6CK1X/350CG24N9XEZ2/B12
R901065634 M-3SED10CK1X/350CG140N9K4
R901064531 M-3SED10CK1X/350CG220N9K4/B15
R900224548 M-3SED6CK1X/350CG96N9K4/B12
R900224544 M-3SED6CK1X/350CG60N9K4
R900224542 M-3SED6CK1X/350CG48N9K4/V
R900224537 M-3SED6CK1X/350CG28N9K4
R900224536 M-3SED6CK1X/350CG240N9K4/B10
R900224535 M-3SED6CK1X/350CG240N9K4
R900224533 M-3SED6CK1X/350CG24N9Z2SO589
R900224531 M-3SED6CK1X/350CG24N9K4SO290
R900224529 M-3SED6CK1X/350CG24N9K4QMBG24
R900224526 M-3SED6CK1X/350CG24N9K4/V
R900224524 M-3SED6CK1X/350CG24N9K4/B22SO290
R900224522 M-3SED6CK1X/350CG24N9K4/B22
R900224520 M-3SED6CK1X/350CG24N9K4/B20
R900224517 M-3SED6CK1X/350CG24N9K4/B18
R900224516 M-3SED6CK1X/350CG24N9K4/B15V
R900224515 M-3SED6CK1X/350CG24N9K4/B15
R900224514 M-3SED6CK1X/350CG24N9K4/B12V
R900224512 M-3SED6CK1X/350CG24N9K4/B10
R900224510 M-3SED6CK1X/350CG24N9K4/B08
R900224505 M-3SED6CK1X/350CG24K4/P
R900224502 M-3SED6CK1X/350CG24K4/B12
R900224494 M-3SED6CK1X/350CG205K4
R900224344 M-3SED6CK1X/350CG205N9Z2SO321
R900224343 M-3SED6CK1X/350CG205N9K4/V
R900224342 M-3SED6CK1X/350CG205N9K4/P
R900224340 M-3SED6CK1X/350CG205N9K4/B18V
R900224339 M-3SED6CK1X/350CG205N9K4/B18
R900224337 M-3SED6CK1X/350CG205N9K4/B12
R900224336 M-3SED6CK1X/350CG205N9K4/B10
R900224329 M-3SED6CK1X/350CG125N9K4/B12
R900224328 M-3SED6CK1X/350CG125N9K4
R900224325 M-3SED6CK1X/350CG12N9K4
R900224322 M-3SED6CK1X/350CG110N9K4QMAG24
R900224320 M-3SED6CK1X/350CG110N9K4/B12
R900224294 M-3SED10UK1X/350CG24N9K4/B18
R900223904 M-3SED6CK1X/350CG110N9K4/V
R900223893 M-3SED6UK1X/350CG110N9K4/V
R900223879 M-3SED10CK1X/350CG96N9K4/P
R900223878 M-3SED10CK1X/350CG24N9K4/P
R900223871 M-3SED6UK1X/350CG96N9K4/P