换向阀是具有两种以流动形式和两个以上油口的方向控制阀。是实现液压油流的沟通、切断和换向，以及压力卸载和顺序动作控制的阀门。
德国力士乐Rexroth电磁阀部分型号如下：
4WE6A70/HG24N9K4
4WE6B70/HG24N9K4
R901089245 4WE6C70/HG24N9K4
R901087088 4WE6D70/HG24N9K4
R901089243 4WE6Y70/HG24N9K4
R901130746 4WE6D70/OFHG24N9K4
R901087087 4WE6E70/HG24N9K4
R901130747 4WE6G70/HG24N9K4
R901130745 4WE6H70/HG24N9K4
R901089241 4WE6J70/HG24N9K4
R901108990 4WE6J70/HG24N9K4/B10
4WE6L70/HG24N9K4
4WE6M70/HG24N9K4
4WE6P70/HG24N9K4
4WE6Q70/HG24N9K4
4WE6R70/HG24N9K4
4WE6T70/HG24N9K4
R901421645 4WE6U70/HG24N9K4
4WE6V70/HG24N9K4
4WE6W70/HG24N9K4
4WE6A62/EG24N9K4
4WE6B62/EG24N9K4
R900561272 4WE6C62/EG24N9K4
R900561274 4WE6D62/EG24N9K4
R900564105 4WE6D62/EG24N9K4/V
R900561276 4WE6Y62/EG24N9K4
R900567512 4WE6D62/OFEG24N9K4
R900561278 4WE6E62/EG24N9K4
R900933648 4WE6F62/EG24N9K4
R900561282 4WE6G62/EG24N9K4
R900561286 4WE6H62/EG24N9K4
R900561286 4WE6HA62/EG24N9K4
R900561288 4WE6J62/EG24N9K4
R900548271 4WE6J62/EG24N9K4/B10
R900901751 4WE6L62/EG24N9K4
R900577475 4WE6M62/EG24N9K4
R900926629 4WE6P62/EG24N9K4
R900561292 4WE6Q62/EG24N9K4
R900571012 4WE6R62/EG24N9K4
R900934414 4WE6T62/EG24N9K4
R900572785 4WE6U62/EG24N9K4
R900933699 4WE6V62/EG24N9K4
R900568233 4WE6W62/EG24N9K4
